I have an Onkyo TX-SR503 tuner/amplifier, the unit is relatively new (purchased within the last year) and I just discovered that when I try to adjust the treble and bass nothing happens. In other words no adjustments are made to the sound.??
Any help would be appreciated,
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Re: treble and bass function
In looking through the service manual for this model, I see a Tone Switch that allows you to bypass the tone circuits, and it may be the one all the way to the left of your front panel. If that's not it, I would get out the owners manual and see what they suggest. I doubt that you actually have an electronic malfunction with your unit.
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I ran into the same issue and was stumped at first. Then I noticed somehow I had changed the sound processing to "Direct" which meant the signal coming from the source was bypassing all of the control in the receiver. All I had to do is select another option (press stereo for example on the remote) and kick it out of the direct mode.
I suspect that the speaker levels need to be set. You connected everything right - many people would not have connected the sats via the bass section (which has their high pass crossover and overload protection). But I am betting the HSU is turned up a bit on the high side.
Try this. Set all speakers to small, set all levels to 0. Play the receiver in stereo all mode. If the bass is strong, you need to turn the HSU down closer to a natural sound. Then use the speaker setup tone and adjust as needed.