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Got everything set up..well sort of...tried the cd player/dac combo using tube out and the bass is really bloated...tried the ss out and it was much better...thoughts?? Its a Grand Fidelity Tube DAC09. Also noticed that when changing tracks but pressing the button on the CDB650 there is a snap sound heard through the speakers..again..thoughts??
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Agree with Palustris - most CD players with "tube output" are just adding a tube buffer to an already complete solid state output.
Kind of a warmer-upper / distortion-adder. Not a very flattering use of tube technology.
More interesting would be a CD player that uses tubes to actually amplify the output of the DAC. Audio Note does this. If anybody knows of others, I'd be curious.
Older equipment may have leaky power supply caps. The Magnavox may need some love and bench time. Have you tried other sources?
I had the same Magnavox CD player my mom bought me in 1987 and in 1992 it developed a high pitched squeal that damaged my brand new (literally the same evening I brought it home from Audiotronics) Adcom GFP-545 amplifier protection circuit. Causing the yellow IM distortion light on one channel to stay on.
I would let it roll and start to swap equipment and cables.
The bitterness of poor quality remains long after the sweetness of low price is forgotten
The 6N11 tube that comes with the DAC is garbage. Get a real 6DJ8 and the tube section should be better.
The Magnavox obviously is outputting a voltage spike on the digital out when you press a button. The easy solution is to not press a button as you are not going to fix it. If it did not pop with other DACs, this one does not have any filtering on its S/PDIF input.
"The 6N11 tube that comes with the DAC is garbage. Get a real 6DJ8 and the tube section should be better. "
Ditto this. This DAC is a very nice one for the price but the stock 6N11 tube is as cheap as it gets. It helped to get the price down. Roll in a nice NOS 6DJ8/ECC88 and be amazed!
using a single dual triode for stereo operation isn't exactly ideal.
Playing with I/C and power cables may help in such cases.
"...tried the cd player/dac combo using tube out and the bass is really bloated..."
I can't speak specifically about this product but sometimes a tube stage is added to a perfectly good CD player or DAC to improve sales. The added tube can be biased to make it sound "tooby" with second harmonic distortion adding the alleged "tooby" sound.
A Magnavox CDB650? Wow. It should be in a museum. I had a CDB465.
LOL....I'm still using a Magnavox CDB460, that I purchased in late 1988.
NO problem with bloated base, as it plugs directly into a homebrew 6N1P/EL34 SEUL integrated amplifier.
Steve
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