Circuit Type Passive, transformer based Number of Channels Single channel (mono) Frequency Response 20 Hz to 20 kHz (0.5 dB) Dynamic Range 115 dB Maximum Input +20 dB Total Harmonic Distortion 0.005% @ 1 kHz Deviation Phase: 3 @ 100 Hz; 8 @ 50 Hz Input Impedance 140 k, unbalanced Output Impedance 1 k, balanced Transformer Eclipse ET-DB3, 12:1 ratio Shield Copper foil Features Input Pad: -10 dB Auto Merge: Sums left & right sources to mono Ground Lift: Disconnects pin-1 at XLR output XLR Configuration: AES standard (pin-2 hot) Connectors 1/4" in & thru, XLR-M out Construction 14-gauge steel chassis & outer shell Finish Baked enamel Dimensions (L x W x D) 4.50 x 1.85 x 1.35" (114.30 x 47.00 x 34.29 mm)