Specifications Power In : 9 to 12VDC (negative TIP) Consumption at 9Vdc : Min 300mA , Max 400mA Consumption at 12Vdc : Min 400mA , Max 500mA Input Sensitivity : 1Vpp Max Input Impedance : <1M Ohm Output Impedance : < 47K Ohm (Unbalanced) DI OUT Impedance : < 47K Ohm (Sim. Balanced) Preamp Linearity Response : 7Hz. to 161Khz. @1db S/N ratio Preamp : <90db S/N ratio Heads : -90dbV Effect Mix Level : Max. 50% WET DI Out Mix : 100% WET Heads preset times : (H1 87ms)(H2 174ms)(H3 260ms)(H4 348ms) Adj Motor speed control : max 740ms Heads Distortion : max 1%THD Tone Freq. : Roll Off Filter 1Khz. @6db/oct. BYP switch : Reed Relays for (stop/spillover option) Output Tube Buffer : 12AU7B (Balanced Triode) Output Tube Buffer Efficiency : >95% Estimated tube Life : Up to 6000Hrs. Dimension : (W)220mm x (L)130mm x (H)50mm Weight : 0.7kg