Amplifier Driving Speakers in Several Rooms? This Volume Control Could Be the Solution! Wire this quality auto former attenuator between your amplifier/receiver and the speakers and you can attenuate (lower) the speaker volume in approximately 3dB steps. Ideal for balancing the volume when one amplifier is driving speakers in several rooms. The module links any amplified audio source up to 8 speakers anywhere in your house. This unique volume control system offers impedance matching with speakers from 4-16 Ohms, enabling you to connect almost any amplifier to your existing speakers.