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Thread Tools | Search this Thread |
16th April 2004, 06:53 PM
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#1 |
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diyAudio Member
Join Date: Apr 2002
Location: Munich
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coyote ugly
A Philips CDD 461 CD rom, this is a kind of cd player for PC with audio out and data I/O.
DAC is TDA1543. Transport is CDM4. It sounds like a tape recorder copy of a tape recording of a record. Low & compressed dynamics, rich harmonics, very nice for electric guitars, I always liked that 20 years ago  I do not believe the TDA is faulty... Now see what you hear  :
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16th April 2004, 06:59 PM
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#2 |
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diyAudio Member
Join Date: Apr 2002
Location: Munich
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Anybody mentioned that channels sound different ?
K3 left -46,7dB, right - 39,3dB.
Very strong noise floor. Left channel: Strong harmonic @ 21 kHz -25dB Right channel: Strong odd order harmonics up to 45kHz. The worst I have ever seen so far. Stacking could help a lot 
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16th April 2004, 07:29 PM
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#3 |
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diyAudio Moderator Emeritus
Join Date: Sep 2002
Location: Germany
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CDROM ! Sound was a feature then, quality was not important. Only 5V and 12V supplies for servos, spindle motor and everything ? Switched PS ? It seems TDA1543 is your worst enemy as you seem to want to prove it's our worst nightmare.
I wonder when you will hook up your analyzer to your fridge with TDAxxxx chip in it.
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It's only audio |
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16th April 2004, 07:45 PM
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#5 |
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diyAudio Moderator Emeritus
Join Date: Sep 2002
Location: Germany
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Every other Philips has more than 2 regulators and several secondary windings on the transformers for symmetric ( +/- ) supplies. Besides that cdplayers are specifically designed for audio, cdrom players aren't.
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