This stereo amplifier boosts your speakers so that they can provide more detailed audio and give you a more complete experience. This model has an USB port to let you connect other
HW Audio
Adastra A4 Dual Stereo Amplifier 4 X 200W (953.404UK)
CommsAndSound
Adastra A4 4 Channel Stereo PA Amplifier, 4x 200W, with Bluetooth