Radial MC3 [Junk]

I've been using this for 5 years, but recently I've noticed some issues, so I'm putting it up for sale.
・There is static noise when adjusting the volume.
・There is a difference in volume between the right and left channels.
・There are no other problems, and all knobs and switches have been tested and are working.
I believe it can still be used for a long time by someone who can clean and repair it. Therefore, this item is:

★★★Being sold as a junk item.★★★

Features:
Speaker A/B
There is one input and two outputs. Each output has an ON/OFF switch, making it easy to compare speaker pairs A/B.

Subwoofer
There is an output for a subwoofer. This also has a dedicated ON/OFF switch. There is also a phase switching switch.

MONO
When the MONO switch is engaged, you can confirm the mono sound.

DIM
Engaging the DIM switch significantly lowers the volume. The cut level of the volume can be adjusted to your preference. The volume for Speaker A/B and the subwoofer can also be adjusted individually.

New units are quite expensive, so I think this will be a great deal for someone who can repair it.