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WEEE-Reg.-Nr. DE 85504828

Audio Intense - DIY electronic kits


PHILIPS VAU1254/31 CD-PRO2LF CD-Pro2 DIY High-End professional complete CD-Player kits, and individual components approximately around the topics CD-Player, DA-Converter and amplifier.

DA-Converter for CD-Pro2LF and other CD and DVD Player


Technical Data:

  • Dynamik >100 dB
  • THD 0,001 %
  • IMD 0,0035%
  • channel separation 115dB
  • Sampl. Frequenz 32...96 kHz
  • special power supply with filtering
  • digital input
    • I2S (optional)
    • s/pdif
  • analog outputstage
    • asymmetric, chinch
    • symmetric out by xlr, optional
  • measurement: 436x345x85 mm
  • weight: 7 kg

The DAC-Pre is DA converter and preamplifier in one device. It offers a high -end converting by Texas Instruments PCM1704 IC and 3. order Filter. It can be connected by coaxial input stage. This device is to be settled by the employment of high-quality parts sounding on highest level. The condensers in the filter are selected by hand. As operation amplifiers OPA604AP or OPA627AP for filtering and audio output are used. The OPA627 operational amplifier reproduces the sound more natural as the OPA604 and offers the best precision and so the best equality between the two channels. The device can work with frequences from 32 to 96 kHz. By the sampling frequency of 96kHz this equipment ideally been suitable to bring DVD- Player to a better performance. - it is worthwhile itself! Straight DVD audio appears in new gloss. The output filters (3.Ordnung) are doubly present. Per one for the frequencies 32-48 kHz and one for 88 and/or. 96 kHz. Thus HF portions are filtered in the best way out. Optional symmetric output stage can be implemented. It works with the famous SSM2141.

By the complex circuit of converting and filtering the sound is very  warm and calm. Details are precisely worked out. The lower frequencies wins at outline. The higher frequencies losses in opposite to other DAC´s the sharpness. With a good cable  connection between transport and DAC it changes sovereign each digital information into an alive spraying sound.

The volume control (optional) works with two stages. Between them the ALPS poti is to be settled. It can be controlled by remote. 

Here you see the complexe power supply and filtering for the DAC. It is the same as for our CD-Player kits.



The DSAC itself work with two PCM1704 for each channel one and filtering of the output stage work with OPA604 or OPA 627 and high end MKP and FKP condensers. (hand selected)

The electrolytic are the sam FC as we use for other sections.

The two channels are separated with a metal shield in the middle.


The receiver works with the CS8414 for s/pdif input.

Alternative one can use the I2S input section.