I have two ATI amps up for sale. They're rock solid, built in the USA amps which I'm only selling because I'm moving toward an amp in a single chassis.
The AT2004 is a 4 channel, fully balanced in and out and is not just balanced connections jumpered to the RCA's. The amp is rated for 200 watts/8 ohms and 300 watts/4 ohm. Great sounding amp with plenty of power to boot. The amp drove my Revel Ultimas perfectly and blew away the XPA-200 I compared it to which I use in my computer setup. Absolutely no contest, night and day difference. The amp was purchased from the original installer and is in excellent shape.
The AT1502 is a 2 channel amp 150 watts/8ohms and 225 watts/4ohms bridgable to 450 watts/8 ohms. Great amp I used for my surround speakers. Also in great condition with one caveat, the power light tends to blink which is a common occurence for this series.
All ATI amps I've owned which is ~10 amps have performed impeccably without issue and I have used them to drive very difficult speakers, i.e. Infinity Kappa 9 which dips to below 1 ohm <100hz which is known to short amps. No problems for ATI amps. ATI is still located in Los Angeles so if there is any issues there's support.
Asking 1000 for the AT2004 and 300 for the AT1502. Pick up only in 92121 for the time being, but am open to shipping




