I got the Altec 9446 from the PE tent sale back in 2013, the rest from eBay over the past year or so.
I currently have:
1 Altec 9442A
3 Altec 9444B's
1 Altec 9446A
4 EV AP2600A's (EV rebadge of 9444B's)
The 9442, two of the 9444's and a 2600 I purchased as parts/repair for very little, shipping was as much or more then the cost of the amp. Only the 9444's had any issues one was a fairly easy inexpensive fix. The other was more difficult to diagnose, a channel would randomly go into protect, finally found the thermistor used for the over temp cutoff on that channel had a cold solder joint. The other amps the sellers could not test to verify working condition which is why they sold them for parts/repair.
In all the amps I am using except the 9446 I replaced the original fan which had become pretty noisy with some new ball baring ones. The fans (both original and the replacements) are 120v AC which makes it easy to mod to slow them down, I just placed a small 1.8uf cap in front of them which cuts the AC voltage without sucking up any power. They have a thermal switch on the heat sink so that will trigger and bypass the cap (and original low speed resistor) if that gets too warm.
Last edited by mtg90; 09-24-2014 at 10:50 AM.