Gem Sound XPS 1000 Power Amplifier by Gem Sound. $249.99. The XPS 1000 from Gem Sound is a professional amplifier with plenty of heft for filling rooms with loud music. It delivers 250W per side at 8 ohms, 375W per side at 4 ohms, and 750W at 8 ohms mono bridged. Fan cooled, it has peak and protection LEDs, is 2U rackmountable and only weighs 35.2lb.