Review: Onkyo M-508 Amplifier

Great sounding power amplifier. I had 2 504's bi-amped after selling my 508. I replaced it with the new sunfire signature 7-channel amp, which allows me to now incorporate home theater. If you can find one, I highly recommend buying this piece. Mine were purchased overseas and was dual-voltage.

I wonder how much of the treble problem isn't a room issue more than an amp issue. I doubt that Onkyo would design a flaw like that into their amp.

I got mine Grand Integra M-508 twenty years ago on the tropical island of Guam for $550(while in the Air Force). It's been hauled all over the world with me and used at least twice a week(for hours on end). The only problem I've had is one of the green lamps on the right power meter burned out-- other than that it has been bullet proof. It has no problem with the treble-it has always had a deep,smooth,rich,luxurious sound--sort of like a 70's vintage high end Marantz. However, I am worried that the eight huge 10,000uF capacitors are going to go bad in a few years(just due to old age), and to get them replaced would cost about $500 for parts and labor.