Hear Everything. PCH is an advanced stereo active direct interface with a hidden superpower – an onboard console-quality headphone amplifier. Now you can rest easy knowing that the sound of your pedalboard won’t change even a little when passing through PCH, and the headphone amp means you won’t have to ask anyone how you sound. You’ll know. Connecting the output of your pedalboard to a DI is a very different thing than simply plugging your bass or guitar straight into one. Pedalboards can generate very loud output signals, enough to swamp the input of ordinary direct boxes. PCH is different, partially because it runs on 9VDC, and it has enough headroom to handle powerful incoming audio while remaining pristine, ensuring you always sound your best. Specifications: In Input Impedance: 1 MΩ Max Input Level: +20dBu Thru Output Impedance: 100 Ω SNR: +135dB (A-Weight) Noise Floor: -115dBV (10-22kHz no A-Weight) Gain Relative to Inputs: +0dB Frequency Response: +/- 0.25dB, 10Hz – 80kHz+ HP Output Impedance: 2 Ω Frequency Response: +/- 0.25dB, 10Hz – 80kHz XLR, Line Setting Output Impedance: 275 Ω SNR: +130dB (A-Weight) Noise Floor: -110dBV (10-22kHz no A-Weight) Gain Relative to Inputs: +0dB Maximum Output Level: +20dBu Frequency Response: +/- 0.25dB, 10Hz – 80kHz+ XLR, Mic Setting Output Impedance: 100 Ω Gain Relative to Inputs: -20dB Maximum Output Level: +0.0dBu SNR: +125dB Noise Floor: -125 dBV (10-22kHz no A-Weight) Frequency response: +/- 0.25dB, 10Hz – 80kHz+ Power Supply Input Voltage: 9VDC Current Requirement: 500mA Dimensions L – 4.88″ (124mm) W – 2.97″ (76mm) H -1.94″ (50mm)