- Continuously variable speed fan with back-to-front air flow
- Full operating features: user-defeatable clip limiter; switchable 30Hz low-cut filter; balanced XLR and 1/4" TRS inputs; detent volume controls; stereo (dual-channel, parallel-input, or bridged mono operating models with selector switch; binding post and Neutrik SpeakonTM outputs; ground-lift switch
- Complete, advanced safety/reliability features: soft-start turn on; noise-free on-off; built-in DC offset; independent DC and thermal overload protection on each channel; short circuit and speaker protection; built-in current limiter
- Parallel outputs allow "daisy chaining" amps
- ~115V (60Hz)/~230V (50Hz) AC select switch Clip and Signal LED indicators for each channel
- Durable double rack space (2U) steel casing
- SPA 850 -- 2 X 300W @ 4 Ohms, 2 X 425W @ 2 Ohms, Bridged mono: 600W @ 8 Ohms, 850W @ 4 Ohms
- SPA 1400 -- 2 X 450W @ 4 Ohms, 2 X 700W @ 2 Ohms, Bridged mono: 900W @ 8 Ohms, 1400W @ 4 Ohms
- SPA 2400 -- 2 X 750W @ 4 Ohms, 2 X 1200W @ 2 Ohms, Bridged mono: 1500W @ 8 Ohms, 2400W @ 4 Ohms
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