Question Turntable Outputting to Only One Speaker

Aug 1, 2019
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I have a Project Debut Carbon which is set up to an amp with a preamp. A few days ago a problem presented itself as only one of the speakers is loud enough, the other one being very quiet. If I disconnect the TT from the preamp and connect it to an aux by itself, both speakers work fine (except of course being both quieter than normal because a preamp is not present.) Can anyone please help me solve this? I resothered each colored cable near the RCA jacks but it didn't solve anything.
 
The problem is in either the phone preamp or the cable connecting it to the amp (if it's an external one.)
If you have a preamp - power amp system and the phone preamp is built in to the preamplifier then the phono section in that can be bad without affecting any of the other inputs.
By the way a phone preamp does more than just amplify the output of the cartridge. It applies the required RIAA EQ that is needed to listen to all records.
 
Aug 1, 2019
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I changed the cable and it did nothing. Can you please what are the thin black cables coming from the same place as the thin colored cables that connect to the RCA jacks?
 
Aug 1, 2019
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It’s a Phono Box E. Got it from the store as a gift with the turntable. Tried resoldering the wires again and did nothing.
 

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