Volume imbalance

Volume controls are the single most unreliable component in the audio chain, for reliability and differences in sound.
In what pre does this dual volume control reside in, and what is the make/value of the volume pot as well???

Cheers George

Hi George, thanks for responding. It is an Alps Japan 89141 100kax2. They are in a vintage Quicksilver Full Function preamp. It is the later version with a single tube(5ar4)rectifier. I have gone for long periods of time listening through the tape outs without any volume control but with 39db of gain from the phono and 4.8mv output from the cart it is a bit much for me as Iike listening at less than realistic levels a lot of the time and the other times my other half gets annoyed when I tell her that I cannot turn it down. I don't think she believes me. So, I sacrifice to keep the peace and the sound is good enough but hey if there is a win win I'm all ears. 

Have you tried using a SPL Meter?

I would say no because it's the one on my iphone5 that I imagine is kinda hoaky. What difference would it make if I did though? I know it's off. I don't mean to sound curt. Thank you.