plugging a Cdplayer to Vintage sx-880 Pioneer

No you will not damage the SX-880 if you don’t crank up the volume control knob to high causing the amplifier to start to distort. If you turn the volume control up to high that will drive the amp into clipping, then you could fry your speakers.

If you read any of the links I provided the common thread is not to turn the volume control up too high which would overload the amplifier and cause it to distort and further increase in the volume clipping.

You can drive any amp into distortion/clipping if you crank the volume up high enough. (Depending on the connected source)

If Al, (almarg), by chance has seen your thread maybe he will take the time to chime in. Al will be able to explain in technical terms in a way the layman can easily understand.
.

I've run many 70's Pioneer and Yamaha receivers and integrateds with various CD players, never a problem...currently a Pioneer SX-737 (refurbished) with Onkyo C-7030 CD  sounds great...Yamaha CA-810 with same CD,  also great ...

After your knowledge and learned understanding cdp & vintage receiver now i m receiving advises for a good matching cdp for my SX-880 Thanks guys

i have Pioneer CDL D504 (old laser disc ) as a cd player opinions about this old good player is good sounding piece?
do i need to overhaul or some maintenance ?
i only clean the laser with a Cd lens cleaner
Thanks