I've got two of these nice QSC MX1500a power amplifiers in a 4 space shock rack.
The MX1500a can provide 400 Watts per channel at 8 ohms, 600 WPC at 4 ohms, 750 at 2 ohms, or 1500 Watts at 4 ohms when bridged.
While a bit heavy (by today's standards) at 42 lbs/19 kg, they are sturdy, stable...