small red lights flash on my Nakamichi PA-7

Wolf, I'm not disagreeing with your experience, as I too, have had experience with the Nak amp, and 200 watt Adcom amps with this type of LED indicator. It will be very easy for these LED's to blink when using speakers with an 85-86db sensitivity in a larger room, playing music with a wide dynamic range moderately loud. I'm sure you realize the amp/speaker relationship is logarithmic, and not linear. A very slight increase in a dynamic peak will require quite a bit more amplifier power.

Here is an article about this amp using different speakers. Check out the next to last paragraph.

http://www.tonepublications.com/old-school/nakamichi-pa-7-amplifier/

Joe, download the manual for GFA-5500 here, and read the section "Instantaneous Distortion Alert LED's". This is basically what a manual for the PA-7 would say.

http://www.adcom.com/manual/cat_view/68-manual/44-stereo-amplifier.html

No sweat Swamp , if you dish it out need to take it too. Life is hard.Wolf really is buried in Vienna right next to Brahms who is
buried right next to Schubert

Just a comment Wolf, didn't think you were.

THANKS TO EVERYONE, some very interesting info for me to use. The speakers are Vienna Acoustics' Baby Grands, my brother-in-law didn't use and sold them to me.
Any ideas on where/how to find operating manuals for the Nakamichi PA-7 and CA-5.
I was playing very loud Highlands Cathedral, a combination of brass, bagpipes and organ.
Again thanks to everyone.
Joe

What's that sound? We're all decomposing.

Out of gas?