Like all members of the Quest QA series amplifiers, QA4004 has got a low pass (80hz, 110hz) and high pass (35hz, 80hz) set of filters, so you can pop one of these on your subs (or mid-highs) and create a simple multi-way PA system without the need for a dedicated external crossover.
However, that’s where the similarity stops. Apart from being 3U rather than the 2U size of the others in the series, this amp is a brute and its supreme horsepower is matched also with some extra kilos.
2 x 1700w @ 4 ohm
2 x 990w @ 8 ohm