Rear speaker issue

[AS-A4Cab]

Hello!

I recently installed an aftermarket head unit, as my Audi original kept getting the CDs stuck (surprise surprise!).

Initially I couldnt get sound out of the tears, until I realised I needed to wire in the amp switch - now I have sound.

The issue I'm having is that in order to get the fronts and rears balanced, I have to set the rears at +10 (from a range of -15 to +15). For obvious reasons, the speakers dont sound amazing - even compared to using stock HU.

Any ideas?

I've got bog standard speakers (no Bose, rear amped only) and a fairly cheap pioneer HU (hand me down from my mate - had a nice one before and it got nicked, so I've given up on having nice stereos!).

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[NHN]

Fact they're outputting sound suggests the lines are connected ok, did you try swapping the lines over to fronts, assuming it has front lines aswell as direct speaker connections to see if the rears improve.