- Biamp Systems REVAMP4100 - 4-channel class-D amplifier, 4x 110 W at 4 ohms, 2x 225 W at 8 ohms (bridged), 4 Euroblock line inputs balanced, 4 Cinch line inputs unbalanced, construction: 1 U, 19", fanless, dimensions (W x H x D): 483 x 44 x 239 mm, weight: 3.5 kg EUR 589.00 - See more - Buy online