"I would think both side should generate similar heat and would be colored in the same manner??"
You would think so but maybe the previous owner wasn't running the amp equally in both channels at high levels for years. Or the heat sinks were from different batches.
Put a test CD (ie. stereophile, etc.) in and using a multimeter on the amp's speaker terminals measure if both channels are the same. Check DC offset while you're there.
You can't evaluate the sound using FM tuner as a source.
How do the Alons sound with your Luxman receiver using CDs? If still bad, don't rule out your speakers and their positioning in the room.
You would think so but maybe the previous owner wasn't running the amp equally in both channels at high levels for years. Or the heat sinks were from different batches.
Put a test CD (ie. stereophile, etc.) in and using a multimeter on the amp's speaker terminals measure if both channels are the same. Check DC offset while you're there.
You can't evaluate the sound using FM tuner as a source.
How do the Alons sound with your Luxman receiver using CDs? If still bad, don't rule out your speakers and their positioning in the room.