Monaural amplifiers from the legendary american maker Spectral.
This auction is for 2 units with manuals, boxes, and power cords.
I would rate these 10/10 functionally and 8/10 cosmetically.
New double boxes were just purchased from Spectral and were quite expensive.
These puppies are rated at 300W each at 8 ohms, and 533W at 4 ohms.
Internal and external construction and component quality is the highest I've ever seen.
Cosmetically the exterior is in very good shape with no significant scratches or dents as visible in the pictures. One of the units has some discoloration on the plastic insert front panel only visible when the unit is powered off, just above the logo and barely visible on the pictures.
The tops do not have any scratches and the aluminum faceplates are clean except for one small nick visible in the pictures. The heatsinks are free of scratches or dents.
Matching MIT interconnects, power cables, and speaker cables are also available - but not included in this auction.
From the spectral literature:
DMA-360 Monaural Power Amplifier
Power Output: (continuous): @ 8 ohms - 300 Watts RMS @ 4 ohms - 533 Watts RMS @ 2 ohms - 680 Watts RMS Output Compliment: 90 Amps peak Frequency Response: +-0.1 dB, DC - 150 KHz +-1 dB, DC - 1 MHz +-3 dB, DC - 1.8 MHz
Distortion: Static: less than 0.015% from DC to 100 KHz, typically 0.009% @ 300 WRMS/8 ohms Dynamic: 8 Tone Cluster Test 20 KHz @ 500 Hz separation 0.01% @ 8 ohms 0.015% @ 4 ohms
Speed: Risetime: less than 300 nanoseconds Settling: 1.5 microseconds to -40 dB Slew Rate: 600 volts/microsecond
Noise: Signal to Noise: 97 dB nweighted, 107 dB ASA A Crosstalk: 98 dB @ full power 8 ohms