I owned an Onkyo T-15 tuner and A-25 integrated amp (40 w/ch) since 1981. Never a problem. A few times I squirted cleaner in the volume pot on the amp. I sold it recently as it didn't have enough inputs for all I wanted to plug in.
I replaced that pair with an Onkyo P-3200 preamp, T-4000 tuner, and M5140 power amp (105 w/ch). These are c.1989-91 era. And I have a DX-C340 CD changer plugged into it, as well as VCR, DVD player. It's nice being able to jumper all of the Onkyo equipment and run off one remote.
(Update- sold the T-4000 and replaced it with an Onkyo Integra T-4500 tuner. Moved the DX-C340 CD changer to the shop. Now have a DX-C370 CD changer)
Didn't have the original remote for the P-3200, but picked up an Onkyo RC-329s remote, which is for the TX-8511. It works everything well, except it won't switch CD's on the changer. 20 yr old Speakerlab towers with this, soon to be replaced.
In the bedroom I have an Onkyo TX-850 receiver (c.1989) and another DX-C340 CD changer. For only 68 w/ch this receiver performs like a much more powerful receiver. I have an Onkyo dual well cassette deck with that setup, and an Onkyo RC-296s remote works all of that well, again, except for changing CD's on the changer.
(Update- The TX-850 is now pushing some KEF Coda III's in my grand daughter's bedroom. I replaced it with a TX-866 receiver, 80 w/ch)
Out in the shop I have a TX-901, 45 w/ch. (Update, gave this to my brother, he likes!) And a Pioneer changer (now also at my granddaughter's). The shop and bedroom systems are hooked up to Optimus Pro-X55AV speakers. These are the same size as the Minimus 77's, 5" woofer and 1" dome. These do well for what I am using them for.
Surprisingly, the TX-901 has the best FM reception, and is inside a metal shop building with only a 5' piece of wire for an antenna. Tried some other antennas, but the 5' pc of wire worked best. Go figure. :scratch2:
(Update- Now have a TX-906 out in the shop, replacing the TX-901. The TX-906 is 80 w/ch)
(Update- the other receivers have now had filter mods, and perform very well)