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Optical digital input with 24 Bit / 96 kHz
for VIOLECTRIC headphone amps

With this circuit it is possible to provide an optical digital input for Violectric headphone amps.

The optical digital input can be used to connect a digital device with an optical digital
output (often called "Tos-Link") like CD/DVD-Players or computers.
PCM coded 2-channel digital data with sampling rates from 28 ... 108 kHz are supported
The characteristics meets the Tos-Link standard EIAJ RC-5720 while the incoming data may be "professional" or "consumer" coded. 

The built-in digital receiver forwards the data to a separate D/A converter offering 110 dB dynamic range and –100 dB THD+N.

The converted digital data has priority over all other analog inputs and will mute these when valid data is received.

In case of ordering a headphone amp and the OPTO input at the same time,
the headphone amp will be delivered with the OPTO option installed in place. 

Delivered afterwards, retrofitting is easily done and consists of pluging and screwing.

The installation manual can be mailed in advance on request.

OPTO 24/96 for HPA (discontinued)

  • Technical Data

Technical Data

Digital Inputs: 1, Tos-Link optical conncetor,
  according to EIAJ RC-5720
Input data format: AES, S/P-DIF, 24 bit / 96 kHz
Sample Rate:
28 ... 110 kHz
Frequency Range:
10 Hz ... 20 kHz (-0,05 dB)
  10 Hz ... 40 kHz (-0,2 dB)
THD+N < -100 dB
Dynamic Range: > 110 dB
Analog Output: unbalanced
Power Supply: +/- 15 ... 18 V from Headphone Amp
Dimensions: 116 x 60 mm (W x D)

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