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Accuphase DF-65 - Digital Frequency Dividing Network

Original price Rs. 1,599,999.00 - Original price Rs. 1,599,999.00
Original price Rs. 1,599,999.00
Rs. 1,599,999.00
Rs. 1,599,999.00 - Rs. 1,599,999.00
Current price Rs. 1,599,999.00

Country of Origin:

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.


1-year manufacturer's warranty


  • High-speed DSP realizes fully digital signal processing in channel divider units
  • The standard configuration allows 4-channel (4-way) system setup
  • 59 selectable cutoff frequency points
  • Highly accurate 96 dB/oct attenuation slope
  • The 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

Video Review:

High-speed, high-precision DSP implements fully digital signal processing. Designed to serve as the core component of a multi-amp system, the channel divider DF-65 features high-speed digital signal processing with amazing power. The latest digital circuit topology and advanced technology come together in a floating-point DSP that has a 32-bit mantissa and 8-bit exponent section, serving as a digital filter. The division into mantissa and exponent prevents errors even when handling very small values. This results in dramatically improved dynamic range and superior precision, allowing very steep cut-off slope settings of 48 dB or 96 dB per octave. All other functions including phase, delay, and level control are also implemented in the digital domain. The result is ultra-precise filtering free from the adverse effects of temperature changes or aging.


59 selectable cut-off frequency points. Filter frequency points can be set over the range from 31.5 Hz to 22.4 kHz in 1/6-octave intervals. In addition, 10, 20, and 290 Hz points are also provided, resulting in a total of 59 points. Each divider unit is fully flexible and allows independent selection of lower and upper cut-off frequency.

Six filter slope characteristics with up to 96 dB attenuation per octave. The filter attenuation characteristics can be set to 6 dB, 12 dB, 18 dB, 24 dB, 48 dB, or 96 dB per octave. The 96 dB/octave setting in particular allows the driver unit to reproduce only its intended frequency without being affected by adjacent frequency bands. This makes it possible to create a multi-amp system that takes musical accuracy to a wholly new level.

Technical Specifications:

Digital Inputs


Format: IEC 60958/AES3 compliant

Sampling frequencies 32 kHz to 192 kHz (16 to 24 bits, 2-channel PCM)


Format: JEITA CP-1212

Sampling frequencies 32 kHz to 96 kHz (16 to 24 bits, 2-channel PCM)

HS-LINK Connector: RJ-45, HS-LINK cable

Ver. 1 Sampling frequencies 32 kHz to 192 kHz (24 bits, 2-channel PCM)

Ver. 2 Sampling frequencies 32 kHz to 384 kHz (32 bits, 2-channel PCM)

(352.8 kHz and 384 kHz are converted to 176.4 kHz and 192 kHz respectively.)

Analog Input

Maximum Input Level 3.7 V (1 kHz, 2.5 V output) Input Impedance BALANCED: 40 kilohms LINE: 20 kilohms

A/D converter Principle 1-bit delta sigma modulation Sample Frequency 176.4kHz Quantization 24bitz

Digital Output

HS-LINK Connector: RJ-45, dedicated HS-LINK cable

Frequency Response

2.0 to 50,000 Hz +0 –3 dB

D/A Converter


32 bits

STEREO Operation

4MDS++ type

MONO Operation

8MDS++ type


0.0007% (20 to 20,000 Hz)

S/N Ratio

STEREO Operation MONO Operation COAXIAL / OPTICAL 121 dB 123 dB HS-LINK 121 dB 123 dB Analog Input 116 dB 117 dB

Dynamic Range

118 dB

Channel Separation

108 dB (20 to 20,000 Hz)

Slope Characteristics

6 dB/octave, 12 dB/octave, 18 dB/octave

24 dB/octave, 48 dB/octave, 96 dB/octave

*When cutoff frequency is 10 Hz: 48 dB/octave, 96 dB/octave not available

20 Hz: 96 dB/octave not available

Delay (converted into distance)

0 to ±3,000 cm (0.5-cm steps)

* Independent settings for left and right possible.

* Delay value range limit (absolute value) for all channels is 3,000 cm

Level Adjustment Range

"Analog ATT" OFF: –40 to + 12.0 dB (0.1-dB steps) "Analog ATT" ON: –50 to + 2.0 dB (0.1-dB steps)

*Independent settings for left and right possible.



Output Impedance


2.5 V, 50 ohms, balanced XLR connector LINE:

2.5 V, 50 ohms, RCA-type phono connector

Minimum Load Impedance


Power Requirements

120/220/230 V AC, 50/60 Hz

Power Consumption

31 watts

Maximum Dimensions

Width 465 mm (18.31˝)

Height 151 mm (15.95˝)

Depth 396 mm (15.59˝)


15.1 kg (33.3 lbs) net

21.0 kg (46.3 lbs) in shipping carton