Removing output mute transistors on a CD player - diyAudio
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Old 1st April 2005, 11:35 AM   #1
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Default Removing output mute transistors on a CD player

I have read in several pots and on decibel dungeon about people removing Cd player output mute transistor to improve sound quailty. However i cannot find and live links on exactly what the process is.
I read somewhere that it was just a case of cutting them out, is this true or do i need to jumper two of the connections after.

Sorry i am new too this and any help would be apprieciated.

Phil Holder
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Old 1st April 2005, 12:41 PM   #2
m127 is offline m127  Hungary
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Just remove them. I wouldn't cut the legs but solder them out.
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Old 1st April 2005, 01:05 PM   #3
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Ok thanks a lot,

I was thinking to de-solder them in case in does anything weird and i need to stick them back in.

Cheera mate,

Fil
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Old 1st April 2005, 01:35 PM   #4
m127 is offline m127  Hungary
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I also said to de-solder them!

And do not let holes remain on the board, fill them with soldering.
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Old 1st April 2005, 01:45 PM   #5
tubenut is offline tubenut  South Africa
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They pull the signal to ground I think when muting, they are not in the signal path as such so you need not bridge anything.
I have not found removing them to make a big difference to my ears. You may get noises on switching the player on and off. I never do because DACs sound best warmed up. btw, i think that on the arcam the dac stays powered up as long as the player is plugged into the mains. irrespective of the power switch.

Also, solder a 75 ohm resistor (or there abouts 82 ohm is also fine) across an RCA plug and stick it into the digital output of the player... sinks the unused digital signal (noise) to ground. Bigger difference from this then muting transistors..
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Old 1st April 2005, 02:31 PM   #6
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Hey Tubenut,

You again thanks again. Ill give that resistor trick a go. Never use SPDIF anyway so its worth a try.

Cheers.

Fil
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Old 1st April 2005, 02:44 PM   #7
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I wouldn't bother filling the unused pads with solder. I can't see what it would achieve and you run the risk of lifting the pads either at that time or if you ever want to add the part back in.
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