Devine D-600 Class-D Amplifier, 2x 300W at 8 Ohms
Does this compare to a QSC or a Crown? No, not at all, but neither of them do a sub-£200 amplifier. If you want a decent amp and don't have a lot of money to spend, I really don't think you can go far wrong.
So why the loss of one star? The frequency response of these amplifiers seems somewhat unpredictable across the audio spectrum when they're bridged. So with that in mind; if you need an amplifier that delivers 1000W per channel into an 8ohm load (full range) I don't think this amplifier is for you...