MSB Technology has introduced the Pro Sub Isolator, a distinctive feature of which is that it is connected to the output of the power amplifier, where the influence of interference is minimal. Once the sensitive signal from the preamplifier passes through the power amplifier, it is “rough” enough to ignore the feedback created by the amplifiers in active subwoofers. The new product reduces the already amplified signal to the required level using an audiophile transformer that isolates the incoming circuit.