{"title":"All Products - Zesto Audio","description":"","products":[{"product_id":"zesto-audio-leto-1-5-vacuum-tube-preamplifier","title":"Zesto Audio Leto 1.5 Vacuum Tube Preamplifier","description":"\u003ch2\u003eZesto Audio Leto 1.5 Vacuum Tube Preamplifier\u003c\/h2\u003e\n\u003ch4\u003eBasics Rule\u003c\/h4\u003e\n\u003cp\u003eMy design philosophy is to focus only on the important components and add nothing that could compromise the signal path. The only active components are the vacuum tubes that create a warm musical sound.\u003c\/p\u003e\n\u003ch4\u003eBalanced Means Lower Noise\u003c\/h4\u003e\n\u003cp\u003eAs a longtime audio engineer and producer, I ve worked with a lot of professional equipment. I always preferred true floating balanced inputs and outputs because of their foolproof ability to isolate one piece of gear from the next.\u003cbr\u003eAnd that means lower noise for a strong, clean and quiet signal.\u003c\/p\u003e\n\u003ch4\u003eEasy to Use\u003c\/h4\u003e\n\u003cp\u003eThe Leto preamp will compliment most systems: tube, solid state or digital. It will work with single-ended and balanced input source or power amplifier combinations.\u003c\/p\u003e\n\u003ch4\u003eFocus on the Music\u003c\/h4\u003e\n\u003cp\u003eWith the Leto in your system it will allow the sonic detail to come through, so you focus is on the music and the hardware will seem to disappear.\u003c\/p\u003e\n\u003ch4\u003eWhat is Leto\u003c\/h4\u003e\n\u003cp\u003eIn Greek mythology, Leto is the mother of Apollo.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNEW\u003c\/strong\u003e now with built in headphone amplifier you can connect your favorite headphones to the Leto without any additional equipment.\u003c\/li\u003e\n\u003cli\u003eSetting the volume control to Theater you can now use your 2 channel system as part of your surround sound eliminating the extra equipment.\u003c\/li\u003e\n\u003cli\u003ePlenty of volume to handle all your source material .\u003c\/li\u003e\n\u003cli\u003eThe input selection uses only electromechanical switching to provide the most musical detail.\u003c\/li\u003e\n\u003cli\u003eThe wide frequency response allows you to hear the finest passages in your music.\u003c\/li\u003e\n\u003cli\u003eTrue floating transformer balanced Inputs and Outputs have lower noise and isolate one piece of gear to the next.\u003c\/li\u003e\n\u003cli\u003eLeft and Right ground switches allows you to control the grounding of the single ended outputs.\u003c\/li\u003e\n\u003cli\u003eThe output transformers provide a strong and clean signal to your power amplifier.\u003c\/li\u003e\n\u003cli\u003eRecessed RCA and XLR connectors are high quality, Gold plated, with an isolated ground.\u003c\/li\u003e\n\u003cli\u003eAll connectors are durable and will hold up to the typical Audiophile who loves to change their configuration.\u003c\/li\u003e\n\u003cli\u003eNo pops when the unit is turned on or off.\u003c\/li\u003e\n\u003cli\u003eAutomatically goes to mute when turned on or off.\u003c\/li\u003e\n\u003cli\u003eRemote control Volume, Mute and Mono\u003c\/li\u003e\n\u003cli\u003eThe remote Mono helps you to trouble shoot your system.\u003c\/li\u003e\n\u003cli\u003eRemote bypass switch overrides the mute in case the remote is misplaced.\u003c\/li\u003e\n\u003cli\u003e50 hour factory burn in on all circuits and vacuum tubes.\u003c\/li\u003e\n\u003cli\u003eElegantly designed 16 gauge zinc plated steel enclosure to help isolate the electronic chatter from nearby equipment.\u003c\/li\u003e\n\u003cli\u003eOn\/Off power switch conveniently mounted on front side panel.\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built Made in the USA .\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecs\u003c\/h5\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003ch4\u003eInputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e5 Inputs\u003c\/li\u003e\n\u003cli\u003e3 sets of Single Ended inputs with an impedance of 100K Ohms\u003c\/li\u003e\n\u003cli\u003e2 sets of true Balanced transformer inputs (pin 2 hot) with an impedance of 10K Ohms\u003c\/li\u003e\n\u003cli\u003eMaximum peak input level of 5 Volts RMS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOutputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNEW\u003c\/strong\u003e 1\/4 TRS inch headphone jack\u003c\/li\u003e\n\u003cli\u003e4 Line outputs\u003c\/li\u003e\n\u003cli\u003e2 sets of true Balanced transformer outputs (pin 2 hot) with an impedance 150 Ohms\u003c\/li\u003e\n\u003cli\u003e2 sets of Single Ended outputs with an impedance 150 Ohms\u003c\/li\u003e\n\u003cli\u003eMaximum peak output level of 10Volts RMS +20dB\u003c\/li\u003e\n\u003cli\u003eIndependent ground lift switches on the left and right Single Ended outputs\u003c\/li\u003e\n\u003cli\u003e1 set of Single Ended Cinema bypass outputs from input #1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDetailed Specifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNEW\u003c\/strong\u003e unity gain volume indicator for home theater surround sound integration.\u003c\/li\u003e\n\u003cli\u003eFrequency response 10Hz to 50Khz ~ 1dB\u003c\/li\u003e\n\u003cli\u003eDistortion ~ 0.02% at 1V RMS input\u003c\/li\u003e\n\u003cli\u003eGain 12dB\u003c\/li\u003e\n\u003cli\u003eSignal to noise ~ 100dB below operating level\u003c\/li\u003e\n\u003cli\u003eNon inverting output polarity\u003c\/li\u003e\n\u003cli\u003eCross talk \u0026gt;90dB\u003c\/li\u003e\n\u003cli\u003eFront panel adjustable balance control\u003c\/li\u003e\n\u003cli\u003eRemote control volume, mute and mono\u003c\/li\u003e\n\u003cli\u003eRemote bypass switch on rear panel (just in case the remote is misplaced)\u003c\/li\u003e\n\u003cli\u003e1% metal film resisters throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003ePower consumption 27W, 0 drain when off\u003c\/li\u003e\n\u003cli\u003eVoltage 110\/120V AC 60Hz\u003c\/li\u003e\n\u003cli\u003eOptional factory installed 220V or 230\/240V AC 50\/60Hz\u003c\/li\u003e\n\u003cli\u003eStandard 3 pin IEC power connector\u003c\/li\u003e\n\u003cli\u003eON\/OFF power switch conveniently located on the side panel\u003c\/li\u003e\n\u003cli\u003eTwo internal high quality linear regulated power supplies, 250V and 12V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eVacuum Tubes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC83S\/12AX7\u003c\/li\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC82\/12AU7\u003c\/li\u003e\n\u003cli\u003eHigh quality gold pin ceramic sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOther Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003eEach unit is hand made in the USA\u003c\/li\u003e\n\u003cli\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eDimensions 17 W X 12 D X 5 H\u003c\/li\u003e\n\u003cli\u003eWeight 23 lbs.\u003c\/li\u003e\n\u003cli\u003e16 gauge zinc plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eTwo year limited warranty\u003c\/li\u003e\n\u003cli\u003eSix months warranty on Vacuum Tubes\u003c\/li\u003e\n\u003cli\u003eRecessed RCA and XLR connectors are Gold plated with an isolated ground.\u003c\/li\u003e\n\u003cli\u003eAll switches and knobs are easily accessible, nothing hidden inside to adjust.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":19548167864374,"sku":"Leto1.5Preamplifier","price":7500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0140\/4859\/1926\/products\/Leto1.5.jpg?v=1743096621"},{"product_id":"zesto-audio-andros-deluxe-phonostage","title":"Zesto Audio Andros Deluxe Phonostage","description":"\u003cp\u003e\u003cstrong\u003e\u003cb\u003eDesign Philosophy\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe Andros Deluxe Phonostage is created from taking the very best attributes from both the Andros 1.2 Phonostage and the Andros Tessera Phonostage while maintaining its own unique sonic personality. We wanted the same footprint as the Andros 1.2 and many of the internal features of the Tessera.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cb\u003eWhat s Unique \u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eA unique feature of the Andros Deluxe is the use of the 12DW7 tubes in the output circuit. The 12DW7 tube is half a 12AX7 and half a 12AU7. We use the 12AU7 half to drive the output transformers because it is high current and low noise, thus allowing for the most frequently requested feature, a true floating ground balanced output.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cb\u003eIt s Quiet, Really!\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe extensive grounding scheme, the circuit design and steel enclosure all play a significant role in the noise reduction of the phonostage, so you can hear the quietest passages in your music.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cb\u003eCircuit Topography\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe heart of the design is the new main circuit incorporating the same large beefy MC step-up transformers as the Tessera, as well as an entirely new output circuit to drive the balanced output transformers. The Andros Deluxe is built with a passion for Analog, designed with 100% tube circuitry and no solid state devices anywhere in the signal path.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-weight: 400;\"\u003e\u003cb\u003eWhy Andros \u003c\/b\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eAndros is a Greek island and the home of George s grandmother s family. Andros is now the name of the Zesto phonostage family.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe high quality built in MC step-up transformers are designed for better phase linearity. They are also large enough to accommodate all the extra windings and the Mu-metal shielding that reduces noise. This translates to better stereo imaging.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eIndependent ground switches affect both the MC-XLR and the MC-RCA inputs and reduce or eliminate hum by breaking those pesky ground loops.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eBalanced transformers reduce noise in two ways, by providing a true differential signal and allowing the ground to float, making the noise level very low.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe MM-RCA connectors are always grounded to reduce noise from your cartridge.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe dedicated output transformers are driven by the 12DW7 output tubes providing an accurate balanced signal to your preamp.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe output RCA connectors have a floating ground and the XLR are grounded to reduce ground loops.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe tube compliment is a pair of gold pin, high gain, low noise 12AX7 s and a pair of gold pin, high current, low noise 12DW7 s.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eDual mono circuit which creates better stereo separation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA low Noise level of -80 dBv below maximum output allows the quietest passages of you music to be heard.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e10 position MC load 1000, 800, 700, 600, 500, 400, 300, 200, 100, 50 Ohms so you can dial in the best match for your cartridge.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eEasily adjustable MC Load on the fly without klicks or pops so you can hear the change.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe gain switch applies to both MC and MM inputs, to better match your cartridges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e100% Analog tube circuitry without any solid state devices in the signal path, because tubes are inherently more musical.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eAll the RCA and XLR connectors are Gold plated for better conductance and lower corrosion.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eRecessed RCA connectors are durable and will hold up to the typical Audiophile who loves to change their configuration.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eAll switches and knobs are easily accessible, nothing hidden inside to adjust.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eEach unit is hand built Made in the USA \u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eElegantly designed 16 gauge steel enclosure to help isolate the electronic chatter from nearby equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecs\u003c\/h5\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo inputs, one MM and one MC\u003c\/li\u003e\n\u003cli\u003eMM Single Ended RCA input\u003c\/li\u003e\n\u003cli\u003eMM impedance 47K Ohms\u003c\/li\u003e\n\u003cli\u003eMM capacitance 220pf\u003c\/li\u003e\n\u003cli\u003eMC transformer Balanced XLR input\u003c\/li\u003e\n\u003cli\u003eMC transformer Single Ended RCA input. Only one MC input can be used at a time\u003c\/li\u003e\n\u003cli\u003e2 independent MC ground lift switches\u003c\/li\u003e\n\u003cli\u003eAll input connectors are gold plated\u003c\/li\u003e\n\u003cli\u003e10 position MC load impedance:1000, 800, 700, 600, 500, 400, 300, 200, 100, 50 Ohms\u003c\/li\u003e\n\u003cli\u003e2 Superior quality MC Internal step up transformers\u003c\/li\u003e\n\u003cli\u003e2 position gain switch for High \u0026amp; Low output cartridges\u003c\/li\u003e\n\u003cli\u003eOne ground binding post\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOutputs per channel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh quality output transformers driven by dedicated 12DW7\/ECC832 output tubes\u003c\/li\u003e\n\u003cli\u003eTrue floating ground, transformer Balanced XLR gold plated outputs\u003c\/li\u003e\n\u003cli\u003eSingle Ended gold plated RCA output, with isolated ground\u003c\/li\u003e\n\u003cli\u003eImpedance 150 Ohms\u003c\/li\u003e\n\u003cli\u003e+7 V max output level\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eActive Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC83S\/12AX7 vacuum tubes with high quality gold pin ceramic sockets\u003c\/li\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC832\/12DW7 vacuum tubes with high quality gold pin ceramic sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2 internal linear regulated power supplies, 1 high voltage 250V and 1 low voltage 12V\u003c\/li\u003e\n\u003cli\u003ePower on red LED\u003c\/li\u003e\n\u003cli\u003eON\/OFF switch on left side of unit\u003c\/li\u003e\n\u003cli\u003ePower consumption 28 Watts\u003c\/li\u003e\n\u003cli\u003eStandard 3 pin 15A IEC power connector\u003c\/li\u003e\n\u003cli\u003eVoltage 110\/120V AC 60Hz\u003c\/li\u003e\n\u003cli\u003eOptional factory installed 220V or 230\/240V AC 50\/60Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2 position Gain switch\u003c\/li\u003e\n\u003cli\u003eGain MC input 63 dB and 68 dB\u003c\/li\u003e\n\u003cli\u003eGain MM input 45 dB and 50 dB\u003c\/li\u003e\n\u003cli\u003eNoise 80 dBv below max output level\u003c\/li\u003e\n\u003cli\u003eFrequency response complies with the original RIAA curve within +or- 0.5 dB\u003c\/li\u003e\n\u003cli\u003eRIAA curve is achieved using a passive filter\u003c\/li\u003e\n\u003cli\u003eNo negative feedback\u003c\/li\u003e\n\u003cli\u003e1% metal film resisters throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003cli\u003eAll analog tube circuitry with no solid state devices in the signal path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOther Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eControls on the rear\u003c\/li\u003e\n\u003cli\u003eMade in the USA using US and imported parts\u003c\/li\u003e\n\u003cli\u003eEach unit is built by hand\u003c\/li\u003e\n\u003cli\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eDimensions main chassis 17\" W X 12\" D X 5\" H (43cm X 30.4cm X 12.7cm)\u003c\/li\u003e\n\u003cli\u003eWeight 21 lbs (9.53 Kg)\u003c\/li\u003e\n\u003cli\u003eShipping weight 24 lbs (10.89 Kg), box 21\" X 21\" X 11\" (53cm X 53cm X 28cm)\u003c\/li\u003e\n\u003cli\u003e16 gauge zinc plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eTwo year limited warranty\u003c\/li\u003e\n\u003cli\u003eSix months warranty on Vacuum Tubes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":19727363276854,"sku":"AndrosDeluxePhonostage","price":6900.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0140\/4859\/1926\/products\/AndrosDeluxe.jpg?v=1743096461"},{"product_id":"zesto-audio-andros-tessera-reference-phonostage","title":"Zesto Audio Andros Tessera Reference Phonostage","description":"\u003cp\u003e\u003cstrong\u003eKey Features \u003c\/strong\u003e\u003cstrong\u003eFor A Quieter and More Musical Phonostage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompletely new 100% tube analog circuit design with optimized components.\u003c\/li\u003e\n\u003cli\u003eDynamic range increased from 108dBV to 116dBV, so the quietest parts are quieter, louder parts are louder.\u003c\/li\u003e\n\u003cli\u003eLoading on the secondary of the MC transformer to capture the most detail from the cartridge.\u003c\/li\u003e\n\u003cli\u003e12 position MC load per channel with more finessed adjustable options like 1000, 800, 700, 500, 400, 350, 300, 250, 200, 150, 100, 50 Ohms\u003c\/li\u003e\n\u003cli\u003eTwo completely independent dual mono channels, with LED indicators for A and B\u003c\/li\u003e\n\u003cli\u003eGain is improved up to 7dB, which increases the output volume to better match your cartridge to your system.\u003c\/li\u003e\n\u003cli\u003eThe voltage increases from 250V to 300V for more headroom.\u003c\/li\u003e\n\u003cli\u003eThe power increases from 52W to 60W to provide more energy needed to reproduce the highs and lows of music accurately.\u003c\/li\u003e\n\u003cli\u003eThe amps increase from 3.4 A to 8 A to provide more current to the tubes.\u003c\/li\u003e\n\u003cli\u003eMaximum output improved from 8V RMS to 12V RMS increases the headroom to allow more musical peaks like trumpet and drums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuieter Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNew 12DW7 tubes improves the amplification to better drive the output tubes which gives you lower noise, more headroom and lower distortion.\u003c\/li\u003e\n\u003cli\u003eDual chassis external power supply\u003c\/li\u003e\n\u003cli\u003eNew Toroid design ESP Supply replaces the linear regulated power supply which generates significantly less noise by concentrating the magnetic fields.\u003c\/li\u003e\n\u003cli\u003eThe dark black noise levels went from -90dB to -95dB.\u003c\/li\u003e\n\u003cli\u003eNew PCB layout with significantly more grounding for lower noise.\u003c\/li\u003e\n\u003cli\u003eDual chassis with 3-meter RFI filtered umbilical cable to eliminate external noise.\u003c\/li\u003e\n\u003cli\u003eDedicated output tubes driving high quality output transformers to create a true differential low impedance output for lower noise and ideal transfer of power to the preamp.\u003c\/li\u003e\n\u003cli\u003eTrue floating ground, transformer balanced XLR inputs and outputs\u003c\/li\u003e\n\u003cli\u003eNew grounding throughout to further reduce the internal and external noise.\u003c\/li\u003e\n\u003cli\u003eSwitching on relays so there’s no digital chatter.\u003c\/li\u003e\n\u003cli\u003eEasily adjustable MC “Load on the fly” without klicks or pops so you can hear the change\u003c\/li\u003e\n\u003cli\u003eElegantly designed 16-gauge steel enclosure to help isolate the electronic “chatter” from nearby equipment\u003c\/li\u003e\n\u003cli\u003eGround lift switches on the MC inputs on each channel to prevent noisy ground loops\u003c\/li\u003e\n\u003cli\u003eAll the RCA and XLR connectors are Gold plated for better conductance and lower corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOther Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAccommodates 4 tonearms, 1 MM and 1 MC per channel\u003c\/li\u003e\n\u003cli\u003eAll settings are saved when you switch between channels\u003c\/li\u003e\n\u003cli\u003eMore energy efficient Standby power that reduces the drain from 7w to 0.5W.\u003c\/li\u003e\n\u003cli\u003eAll switches and knobs are easily accessible, nothing hidden inside to adjust\u003c\/li\u003e\n\u003cli\u003eRecessed RCA connectors are durable and will hold up to the typical Audiophile who loves to change their configuration\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built “Made in the USA”\u003c\/li\u003e\n\u003cli\u003e50-hour factory burn in on all circuits and vacuum tubes before final testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"display: block;\" class=\"tabpanelcontent clearfix TabbedPanelsContentVisible\"\u003e\n\u003cp\u003e\u003cstrong\u003eInputs per Channel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo completely independent dual mono channels, A and B with LED indicator\u003c\/li\u003e\n\u003cli\u003eAccommodates 4 tonearms, 2 per channel\u003c\/li\u003e\n\u003cli\u003eSeparate MM and MC inputs per channel\u003c\/li\u003e\n\u003cli\u003eEach channel has independent controls and all selections are saved when you switch between channels\u003c\/li\u003e\n\u003cli\u003eSelection switch for MC and 2 position MM 47K and MM 68K\u003c\/li\u003e\n\u003cli\u003eMM impedance switch 47K or 68K Ohms\u003c\/li\u003e\n\u003cli\u003eMM capacitance 220pf\u003c\/li\u003e\n\u003cli\u003eMC transformer Balanced gold plated XLR input\u003c\/li\u003e\n\u003cli\u003eMM and MC Single Ended RCA input, gold plated with isolated ground\u003c\/li\u003e\n\u003cli\u003e4 MC ground on\/off switch\u003c\/li\u003e\n\u003cli\u003e12 position MC load impedance:1000, 800, 700, 500, 400, 350, 300, 250, 200, 150, 100, 50 Ohms\u003c\/li\u003e\n\u003cli\u003e4 Superior quality MC Internal step up transformers\u003c\/li\u003e\n\u003cli\u003e3 position MC gain switch for High, Medium \u0026amp; Low output cartridges\u003c\/li\u003e\n\u003cli\u003eTwo ground binding posts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOutputs per channel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh quality output transformers driven by dedicated 12AU7\/ECC82 output tubes\u003c\/li\u003e\n\u003cli\u003eTrue floating ground, transformer Balanced XLR gold plated outputs\u003c\/li\u003e\n\u003cli\u003eSingle Ended gold plated RCA output, with isolated ground\u003c\/li\u003e\n\u003cli\u003eImpedance 600 Ohms\u003c\/li\u003e\n\u003cli\u003e+12V max output level\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eActive Components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC83S\/12AX7 vacuum tubes with high quality gold pin ceramic sockets\u003c\/li\u003e\n\u003cli\u003eTwo (2) JJ ECC832\/12DW7 vacuum tubes with high quality gold pin ceramic sockets\u003c\/li\u003e\n\u003cli\u003eTwo (2) Gold pin JJ ECC82\/12AU7 vacuum tubes with high quality gold pin ceramic sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDual chassis\u003c\/li\u003e\n\u003cli\u003ePower supply with 3 meter DC umbilical cable incorporating special RFI suppression\u003c\/li\u003e\n\u003cli\u003eLocking bayonet connector rated for higher voltage and higher current\u003c\/li\u003e\n\u003cli\u003eNew ESP Supply with 3 Toroid. 1 high voltage 300V and 1 low voltage 12V low power and 1 low voltage 12V high power, housed in the external unit.\u003c\/li\u003e\n\u003cli\u003ePower supply dual color LED, yellow for standby and red for ON\u003c\/li\u003e\n\u003cli\u003eMain unit push ON\/OFF front power switch illuminates a red LED on Channel A or B\u003c\/li\u003e\n\u003cli\u003ePower supply standby switch on the front\u003c\/li\u003e\n\u003cli\u003ePower supply standby power rating 0.5 Watts\u003c\/li\u003e\n\u003cli\u003ePower consumption 60 Watts\u003c\/li\u003e\n\u003cli\u003eStandard 3 pin 15A IEC power connector on power supply\u003c\/li\u003e\n\u003cli\u003eVoltage 110V – 120V AC 60Hz\u003c\/li\u003e\n\u003cli\u003eOptional factory installed 220V – 240V AC 50\/60Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3 position Gain switch\u003c\/li\u003e\n\u003cli\u003eMC input 65dB, 70dB and 75dB or MM input 47dB, 51dB and 55dB\u003c\/li\u003e\n\u003cli\u003eNoise  95 dBV below max output level\u003c\/li\u003e\n\u003cli\u003eDynamic range 116 dBV\u003c\/li\u003e\n\u003cli\u003eFrequency response complies with the original RIAA curve within +or- 0.5 dB\u003c\/li\u003e\n\u003cli\u003eRIAA curve is achieved using a passive filter\u003c\/li\u003e\n\u003cli\u003e1% metal film resisters throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003cli\u003eAll analog 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(12.25 Kg), Power supply 18 lbs. (8.16 Kg)\u003c\/li\u003e\n\u003cli\u003eShipping weight 55 lbs.(24.9 Kg), box 20″ X 20″ X 16″\u003c\/li\u003e\n\u003cli\u003e16 gauge zinc plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eTwo year limited warranty\u003c\/li\u003e\n\u003cli\u003eSix months warranty on Vacuum Tubes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":41076130676847,"sku":"AndrosTesseraReferencePhonostage","price":19900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0140\/4859\/1926\/files\/T-REF-front-web-1-1024x486.jpg?v=1743012549"},{"product_id":"zesto-audio-allasso-step-up-transformer","title":"Zesto Audio Andros Allasso Step Up Transformer","description":"\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003e3 Reasons You May Want a Step up Transformer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou own a very low or very high output MC cartridge.\u003c\/li\u003e\n\u003cli\u003eYour cartridge Loading\/Gain is difficult to match on your current system.\u003c\/li\u003e\n\u003cli\u003eYou own more MC cartridges than MM and don’t want to buy another phonostage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWhy You Need a Phonostage with a Step up Transformer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA step up transformer does not have the RIAA curve equalizer. It doesn’t have power either. It goes between your turntable and your phono preamp.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy a Phonostage is So Important\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen a vinyl record is made the volume of the bass is reduced and the treble is increased. Otherwise, the bass would cut a groove too big for a stylus to read or for the music to fit the record. The phonostage reverses the process by taking the delicate signal from your cartridge and adjusting it so that the bass and treble are restored to their original volume. This common standard is known as the RIAA curve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWorks on Any Phonostage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Allasso is extremely versatile. It will work with any standard phonostage with a 47K MM input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Does a Step up Transformer do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt amplifies the delicate signal from your MC cartridge. An MM cartridge has a higher output than MC, so a MC needs to have a different step up ratios\/gain to reach the same output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eYou Have Lots of Choices\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou now have 40 options in Stereo and 40 options in Mono. It has enough adjustments to tailor it specifically to your cartridge or your next one. It’s just you and your ears, no math skills required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWhat is Allasso?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAllasso in Greek means to change or transform one thing to another.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAllasso in Greek means to change or transform one thing to another.\u003c\/li\u003e\n\u003cli\u003eIt’s very versatile! Will accommodate the widest range of cartridges with 40 adjustments in Mono and 40 adjustments in Stereo.\u003c\/li\u003e\n\u003cli\u003eIt’s flexible to allow you to control the 4 step up ratios\/gain settings, each having 10 load positions.\u003c\/li\u003e\n\u003cli\u003eDesigned with the highest quality MC transformers. They are quiet, with extra shielding and large enough with the multiple windings to handle even your high output cartridges.\u003c\/li\u003e\n\u003cli\u003eIt’s easy to use as all the adjustments are on the front, nothing is hidden inside.\u003c\/li\u003e\n\u003cli\u003eAll adjustments can be done on the “fly” without clicks or pops.\u003c\/li\u003e\n\u003cli\u003eNo math skills are required; it’s just you and your ears.\u003c\/li\u003e\n\u003cli\u003eEnough adjustments to tailor it specifically to your cartridge or your next one.\u003c\/li\u003e\n\u003cli\u003eWorks with any standard MM input on any phonostage.\u003c\/li\u003e\n\u003cli\u003eDesigned to reduce “Hum” with 2 ground lift switches and 2 ground binding posts.\u003c\/li\u003e\n\u003cli\u003eThe Mono switch is specifically designed to reduce “Hum” in your Mono cartridge.\u003c\/li\u003e\n\u003cli\u003eA unique feature of the Mono switch is it takes a single input and sends to both outputs.\u003c\/li\u003e\n\u003cli\u003eIt’s quiet, with extensive grounding in the circuit design and enclosure.\u003c\/li\u003e\n\u003cli\u003eRCA connectors are high quality, Gold plated, recessed with an isolated ground.\u003c\/li\u003e\n\u003cli\u003eRecessed RCA connectors are durable and will hold up to the typical Audiophile who loves to change their configuration.\u003c\/li\u003e\n\u003cli\u003eElegantly designed 18 gauge steel enclosure to help isolate the electronic “chatter” from nearby equipment.\u003c\/li\u003e\n\u003cli\u003eEasy to read large type on back panel.\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built “Made in the USA”.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecs\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency response -3dB at 0.4Hz to 100 KHz\u003c\/li\u003e\n\u003cli\u003ePhase deviation 1° typical at 20Hz\u003c\/li\u003e\n\u003cli\u003eTransformer noise 2 dB @ 20 ?, 1.8 dB @ 12 ?\u003c\/li\u003e\n\u003cli\u003eHum rejection                 125 dB @ 60 Hz\u003c\/li\u003e\n\u003cli\u003eVoltage gain                 12dB, 16dB, 18dB and 22dB\u003c\/li\u003e\n\u003cli\u003eStep up ratios                  1:4,    1:6,    1:8 and 1:12\u003c\/li\u003e\n\u003cli\u003eMC load 40 positions in Mono, 40 positions in Stereo\u003c\/li\u003e\n\u003cli\u003eRecommended output load 47K? @ 200pF (MM input)\u003c\/li\u003e\n\u003cli\u003eInputs Balanced and Single Ended MC\u003c\/li\u003e\n\u003cli\u003eOutputs Single Ended\u003c\/li\u003e\n\u003cli\u003eGrounds Independent input ground-lift switches\u003c\/li\u003e\n\u003cli\u003eGrounds Two ground binding posts\u003c\/li\u003e\n\u003cli\u003eMono Takes one input and sends it to both outputs\u003c\/li\u003e\n\u003cli\u003eDimensions 4”H X 6”W X 8”L (101.6mm X 152.4mm X 203.2mm)\u003c\/li\u003e\n\u003cli\u003eWeight 5lb (2.27Kg)\u003c\/li\u003e\n\u003cli\u003eShipping weight 8lb (3.63Kg)\u003c\/li\u003e\n\u003cli\u003eBox dimensions 7”H X 9”W X 13”L (177.9mm X 228.6g X 330.2g)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":52214593683823,"sku":"ZestoAndrosAllasso","price":3600.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0140\/4859\/1926\/files\/Allassob-wfront2.webp?v=1757677272"},{"product_id":"zesto-audio-bia-120-stereo-tube-power-amplifier","title":"Zesto Audio Bia 120 Stereo Tube Power Amplifier","description":"\u003cp\u003e\u003cstrong\u003eClass A Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCircuit Topology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eI choose a Class A Ultra-linear, Push-Pull circuit design to deliver the most precise, enjoyable and faithful reproduction possible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnsung Hero\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unsung hero of a power amp is its power supply. That’s why my design incorporates a custom Toroid power transformer and a choke-based, dual-mono power supply to deliver all the “slam” you can handle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy to use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith Auto Bias, you need no adjustments. 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16 Ohm taps gives you options for your speaker preference\u003c\/li\u003e\n\u003cli\u003eDual Mono gives you less cross talk and better stereo imaging\u003c\/li\u003e\n\u003cli\u003eChoice of high quality gold plated Single Ended RCA or Balanced XLR connectors to suit your needs or cable preferences\u003c\/li\u003e\n\u003cli\u003eTrue transformer differential balanced XLR inputs for the best noise rejection\u003c\/li\u003e\n\u003cli\u003eIndependent Left and Right ground switches on the XLR balanced inputs to eliminate ground loops and hums\u003c\/li\u003e\n\u003cli\u003eNo Negative Feedback design does not modify or compress the musical signal\u003c\/li\u003e\n\u003cli\u003eLarge custom Toroid is higher voltage for increased performance and lower noise\u003c\/li\u003e\n\u003cli\u003eGlobal mains power supply can work all over the world\u003c\/li\u003e\n\u003cli\u003eProvides plenty of gain for your system\u003c\/li\u003e\n\u003cli\u003ePush-Pull\/Ultra Linear circuit design provides lower distortion, more power, and a better performance out of your tubes\u003c\/li\u003e\n\u003cli\u003eLow noise levels allow really dark black quiet musical passages\u003c\/li\u003e\n\u003cli\u003eNon-inverting polarity retains the same phase as the input (so your trumpets blow and don’t suck)\u003c\/li\u003e\n\u003cli\u003eGold pin sockets are more reliable because gold doesn’t oxidize when it heat cycles\u003c\/li\u003e\n\u003cli\u003eMatched quad KT150 output tubes retain the stereo balance and lower noise\u003c\/li\u003e\n\u003cli\u003eElegantly designed, heavy duty 14 \u0026amp;16 gauge zinc plated steel enclosure to accommodate the extensive grounding scheme\u003c\/li\u003e\n\u003cli\u003eThe optimized frequency response provides the best musical range to benefit the natural harmonic structure of the instruments\u003c\/li\u003e\n\u003cli\u003eAll fuses are easily accessible\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built “Made in the USA”\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":52214601580911,"sku":"ZestoBia200","price":15900.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0140\/4859\/1926\/files\/Bia200A.png?v=1757678545"}],"url":"https:\/\/www.safeandsoundhq.com\/collections\/all-products-zesto-audio.oembed","provider":"Safe and Sound HQ","version":"1.0","type":"link"}