One pair of Audio Alchemy OM 90.1A Mono Power Amplifiers. These amplifiers are highly sought after and extremely rare. Only 100 pair were made. They were designed and built by Andy Hefley under contract from Audio Alchemy. They were Audio Alchemy's entry into the extreme high-end arena, but the company was sold and that project stopped. They were all built about 1996. Only about 50 pair were made in US voltage. Here are a few details about them:
Fully balanced design and can run single-ended, too. Fully functional. 90 watts pure Class A into 8 ohms. 180 watts pure Class A into 4 ohms. No current limiting - these can drive <1 ohm loads. Not sliding bias. They do run hot. Beautiful 3/4" thick milled aluminum faceplate. 220,000 uF of filter caps; multiple smaller values - all sited right near the output devices for shortest path. Approx. 75 lbs each net weight. US voltage.
Serial #: 900512 and 900515 Voltage: 120v
These amps have the following Upgrades:
Cardas top-line CCGR speaker binding posts.
EDI BRUS4 ultra-high speed bridge rectifiers. Soft start (via inrush limiters).
Original MSRP was $5000 each ($10,000/pr).