Long story short: My NAD 2600 blew up from static electricity. A friend
who is not an audiophile has offered me an Adcom 555 Mk 2 really cheap
for $150.

The rest of my system is: Teac Esoteric P-10 transport to PS Audio sl3
D/A by Illumanati cable. McCormick Line Drive Deluxe passive pre. NHT
2.5I speakers bi-wired. All analog wiring is Tara. Also have analog
components & a Pioneer universal SACD player. Listening comments below
are with the digital front end.

I just plugged the Adcom in (I'm told it hadn't been used much lately) &
have 3 concerns. With all 3 concerns, my question is, "Is this normal
behavior for an Adcom amp?"

1. The heatsinks are quite hot from playing 4 songs at normal volume & the amp also runs really hot just idling.

2. There is some light hiss in both channels, even with the input muted.
One channel has more hiss then the other

3. The amp is quite a bit brighter then the NAD. It may need to warm up
for awhile (though again, the heat sinks are almost too hot to touch)

i've been using an adcom amp and pre-amp for a while now (can't remember the numbers, sorry) and i have zero problems with them. in fact the work wonderfully and never get very hot at all, no matter how long they are on.

i did have a small buzzing sound when i first got them but it weas because the connections were not tight enough and had nothing to do with equipment.

if the one you are talking about gets that hot that fast i would stay away, no matter the price.

renny

Adcom just wrote me that they believe the heat is a bias problem that a tech could fix. Since that costs money................