Behringer HD400, 2-Channel hum suppressor@+Don't be fooled by the compact dimensions of this 2-channel hum suppressor, because as a powerful problem solver it should not be missing in any rack! This handy device quickly and reliably removes hum and noise. The HD400 automatically converts unbalanced signals into balanced signals. The unit has two 6.3mm stereo jack inputs and outputs for two mono signals or one stereo signal., Simple, fast and reliable removal of mains hum and noise., Safe and effective interruption of humming loops, Automatic conversion of unbalanced into balanced signals, Inputs: 2 Stereo jack sockets 6.3 mm, Outputs: 2 Jack sockets 6.3 mm (2x mono or 1x stereo), Dimensions: 32 x 57.2 x 103.6 mm, Weight: 180 g