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Classe Delta Stereo Power Amplifier

by Classe
UPC: 883795004800
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Classe Delta Stereo Power Amplifier

The Delta STEREO distills all of Class 's innovation and knowledge into a compact high-performance stereo amplifier.

In situations where dual mono amplifiers can't be accommodated, Delta STEREO offers uncompromising performance in a single component.


The first 12.5W of power output are pure Class A, and with a total of 250W per channel at its command (over 350W/Ch @ 2 ), this compact, powerful amplifier drives loudspeakers with utmost confidence.

Up to 12.5W per Channel delivered in pure Class A operation
250W per Channel total
Massive, high-quality power supply
Custom toroidal transformer


Delta STEREO delivers exceptional clarity. Every effort has been made to preserve complete separation between channels, delivering the natural, expansive sound that Class is legendary for.

Hand-laid circuit boards
6-layer circuit boards provide for shortened signal and power pathways with lowest noise
22 4-pole Mundorf capacitors
Custom-made Navcom feet to absorb vibrations
Furutech rhodium-plated RCA and torque-guard speaker connectors


Delta STEREO has presence. It s capabilities are expressed through design and it looks fantastic in any room or installation.

Superb material finishes and a pair of custom-designed illuminated VU meters display power output for both channels beautifully.

Delta Series design concept is to create a monument to sound. This amplifier looks every bit has capable as it sounds.



17.50 in (444 mm)
19.37 in (492 mm)
8.74 in (222 mm)


Gross Weight
116.4 lbs (52.8 kg)
Net Weight
102.3 lbs (46.4 kg)


Frequency Response
(-3dB, 50 source impedance)
1Hz 650kHz
Continuous Output Power
(at 1kHz, 0.1% THD+N)
12.5W / 8 delivered in pure class A operation
250W / 8
500W / 4 (with AC line held constant)
350W / 2 (with AC line held constant)
Harmonic Distortion
(measurement bandwidth:
500kHz, 25Vrms in 4 or 8 )
<0.0016% at 1kHz
<0.002% at 10kHz
<0.003% at 20kHz
Harmonic Distortion
(measurement bandwidth:
90kHz, 25Vrms in 4 or 8 )
<0.0007% at 1kHz
<0.001% at 10kHz
<0.0025% at 20kHz
Peak Output Voltage
(nominal AC line)
129Vp-p into 8
138Vp-p no load
Input Impedance
(at 1kHz, BAL / SE)
Voltage Gain
(at 1kHz, BAL / SE)
Intermodulation Distortion
(SMPTE 4:1) (8 or 4 , BAL / SE)
Intermodulation Distortion
(CCIF) (8 or 4 , BAL / SE)
Signal-to-Noise Ratio
(A wtd in parenthesis) (22kHz BW)
118dB (120dBA)
(one channel driven to 250W / 8 )
124dB (100Hz), 107dB (1kHz),

90dB (10kHz)
Slew Rate
75V / s
Output Impedance
0.009 (100Hz), 0.009 (1kHz),

0.012 (10kHz)
Damping Factor
(at 1kHz, ref 8 )