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Accuphase DF-65 Digital Frequency Dividing Network


SKU AccuphaseDF-65

Accuphase DF-65 Digital Frequency Dividing Network

The Digital Frequency Dividing Network DF-65 harnesses the very best of digital technology in every aspect, including a high-speed 40-bit floating point DSP. The standard unit configuration supports signal processing for up to four-way systems. Highly accurate digital filters offer a choice of 59 cutoff frequency points and up to 96 dB/octave attenuation. Integrated time alignment function adjustable in 0.5-cm steps, and delay compensator for automatically offsetting any filter circuit delays. Monophonic output mode provides high versatility for various configurations.

  • High-speed DSP realizes fully digital signal processing in channel divider units
  • Standard configuration allows 4-channel (4-way) system setup
  • 59 selectable cutoff frequency points
  • Highly accurate 96 dB/oct attenuation slope
  • Time alignment function allows delay time setting in 0.5-cm steps
  • Delay compensator offsets signal delays in filter circuitry
  • Further refined MDS++ D/A converter
  • Selectable monophonic output mode for further enhanced specifications

Slope characteristics Six types: 6 dB, 12 dB, 18 dB, 24 dB, 48 dB, 96 dB / octave
Delay setting range (converted into distance) –3,000 to +3,000 cm (0.5-cm steps)
Delay compensator ON: Automatic compensation OFF: Manual compensation
Level setting range –40 dB to +12 dB (0.1 dB steps)
Phase Left/Right: Normal/Reverse, 4 patterns
Memory (Save/Recall) For 4 channels together, 5 types
Character display 8 characters (preset names or select from 97 characters)

Analog input Line/balanced input, one each A/D converter: 24-bit/176.4 kHz
Analog output Each channel: Line/balanced input, one each
D/A converter Stereo operation : 32-bit, 4 MDS++ Mono operation : 32-bit, 8 MDS++
Sampling frequencies
OPTICAL: 32 kHz - 96 kHz COAXIAL: 32 kHz - 192 kHz HS-LINK: 32 kHz - 192 kHz (Ver. 1)
32 kHz - 384 kHz (Ver. 2)
Digital output HS-LINK, for 5-way and higher configurations
Frequency response 2.0 to 50,000 Hz, +0, –3 dB

THD + Noise 0.0007% (20 - 20,000 Hz)
Channel separation 108 dB
S/N ratio Digital input : 121 dB Analog input : 116 dB
Output voltage, output impedance LINE/BALANCED: 2.5 V, 50 ohms
Number of channels 4-way (unused channels can be set to OFF)
Maximum dimensions 465 (W) × 151 (H) × 396 (D) mm (18-5/16" × 5-15/16" × 15-9/16")
Mass 15.1 kg