DIP Combo Instructions

Caution | Instructions | Back Diagram | Functional Diagram | Functions Explained | Hook-Up Configurations

Caution

The front panel handles of the toggle switches are prone to damage by mishandling.
Please handle box with care.

Instructions

1. Lock light – It will come on when valid digital data is received. The Combo does not function unless the Lock light is illuminated. No Lock light means there is a  problem in the incoming signal.
2. Input selector – Opto for optical input. Line is reserved for either coaxial RCA or balanced AES/EBU input. When Line is chosen, only a coaxial or balanced input can be connected. The Combo would not function when both Line inputs are hooked up at the same time.
3. LED – The LED will light up when the Combo’s sampling frequency is set at 44.1kHz. A precision “Red Book” 44.1Khz clock is generated at the output.
4. LED – The LED will light up when the Combo’s sampling frequency is set at 96kHz. An accurate clock at 96KHz is generated at the output.
5. Sampling – This selector sets the sampling frequencies at 44.1kHz or 96kHz.

For D/A converters that cannot be operated at the 96kHz sampling frequency, the Combo’s sampling frequency at 44.1kHz will promote higher accuracy for the partnering D/A converter. As a result, better sonic performance can be attained.

For 24/96 D/A converters, selecting the 96kHz sampling frequency will result in better resolution. Conventional CDs will be up-sampled to the 96kHz sampling frequency instead of 44.1kHz. This is especially beneficial in pulse response.

(Please see separate graph comparing pulse response  between 48 and 96Khz. Improved pulse response will enhance percussion music reproduction.)

Top

Back Diagram

Notes:

1. Use either RCA or Balanced cable one at a time. DO NOT connect both at the same time.
2. Both Opto and RCA (or Balanced) can be connected to the DSP at the same time. Use the Input selector on front panel for switching between Opto or RCA (or Balanced) input.

Top

 Functional Diagram

DIP Functions Explained

First, please note that the DIP Combo offers the following features in both the Classic(44.1K) and Upsampled(96K) modes:

1: boosted signal strength(to 5 times higher) this mitigates the deficiency in many digital cables
2: signal conditioning(jitter reduction)
3: ground isolation(from hum and noise)
4: format change(from Opto to RCA; from Co-axial to Balanced, etc)
5: precision clocks (at 44.1 and 96Khz)

Then, please note that the precision clocks offer very important functions:

1: it allows the DAC to operate at higher accuracy. Hence better sound. (The incoming clock from the transport is actually discarded)
2: it allows the user to choose, sometimes by listening, to see which
    sampling rate gives him better sound.

While Upsampling has many advantages(especially in the way of pulse response,  please see attached to see the difference between 48 and 96K),   often some recordings seem to sound better in its "Native" sampling rate(44.1K).  The toggle switch on the front panel therefore becomes very important in offering the user an instant selection between the two formats. Users should have fun determining which format gives him better sound on a given disc.

Top

DIP Hook-Up Configurations

Top

Top