An interface for an earth-free connection af active sub-woofer. The input features 2 binding posts for connecting to an amplifier output. Each output features one XLR and one RCA terminal, both with reduced level.

For connecting active sub-woofers to amplifier with balanced speaker outputs (i.e. all B.M.C. models, bridged amplifiers...) the use of Woofe 1 is mandatory for avoiding amplifier damage and hum noise.