Hello everybody, and thanks in advance for your help.

I have a F900BT installed in a BMW E90 amplifier that brings high-installed home. The problem is that it appears to turn on the radio, if the volume is low (between 0-17 or so), the left front channel is the volume below the other channels. At the volume up, the problem is corrected, and it works fine even at low volume. What could be happening? Do you miss someone? Not always the case, and not always be solved with the same volume level. Is the radio or the amp's home car.

Thanks for your answers.

I might be totally on the wrong track here but...

Have you installed custom speakers? if so it could be they are wired wrong or may be touching something. I had a similar problem with my Astra and found where i had sound proofing round the speakers the terminals were touching the metal and causing sound issues.

Also im not sure if you meant you have a built in seperate amplifier if so have you tried wiring the speakers straight to the Head Unit instead of through the built in amplifier, i also had a similar problem with my Escort cabriolet which had a seperate built in amplifier i took it out and wired the speakers directly to the head unit and it worked fine.

I dont think it has anything to do with the F900BT let me know if im wrong

The speakers are not connected directly. Connect the speakers directly is complicated, we should dismantle the connector that goes to the amplifier. With radios that I had before, never happened.

I have suggested to check the membrane of the speaker, as it can be damaged.

If all agree on something that I asked is that the radio does not seem to have any problem, it should be the amplifier or speakers, which reassured me a lot.

Thank you very much for your reply, I will continue investigating.

No probs let us know the outcome, hope u get it sorted

its defintly either the amp, speakers or a bad connection. also make sure the balance and fade is even

The fade and balance are correct, I did the checks. Now that time has a curiously does not fail, I think there is something in the speaker. I look. Thank you very much for your reply.

no problem