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DF-65 Digital Frequency Dividing Network

Vendor: Accuphase
DF-65 Digital Frequency Dividing Network - Trimira
DF-65 Digital Frequency Dividing Network



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




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)


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
THD 0.0007% (20 to 20,000 Hz)
S/N Ratio
  STEREO Operation MONO Operation
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
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

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Our refund policy operates in a 30-day window - after this time we are unable to accept the product and cannot issue a refund. Don't worry, our products are hand picked from thousands of luxury brands to ensure you are only offered the best of the best so we doubt you'll need to consider this policy at all. If you are concerned about making the wrong decision when it comes to your purchase, please feel free to talk with our team of experts who can advise you on equipment based on your personal music taste, aesthetics, and the layout of your listening room. Still not convinced? Discuss the possibility of a loan (trial period) with our experts and hear the difference yourself.

Our refund policy can be viewed here.

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