Hi all, I’m trying to refurbish a Telefunken Studio 1M , only one issue on the cassette deck is that the left channel seems to have a complete lack of bass , the left VU meter also confirms this , I am however hearing the mods and treble from the left channel , the right channel is fine , radio works fine on both channels , I there anything I can check , also when I press record the VU meters on both channels work fine not sure if this helps pinpoint the issue , thanks for any advice
