INPOL EAR - Made in Italy (Special Order Only) Pure Class A Headphone Amplifier and Preamplifier Overview A class-A hybrid with two Electro-Harmonix 6922's and Pathos' InPol circuit InPol Ear is a pure class-A integrated headphone amplifier, with a fully balanced latest generation double InPol. It features two balanced and one unbalanced output and allows the addition of the HiDac Mk2 converter. InPol (Inseguitore Pompa Lineare - Linear Pump Follower) is a Pathos patented system that allows for much greater output in pure Class A. This fully balanced circuit design uses a single solid-state component in follower configuration, with a high-current gain and voltage gain together. Specifications Type: Reference stereo integrated amplifier for headphones. Pure Class A double INPOL technology Output power (unbalanced, balanced) 32 Ω: 3 W, 10 W 50 Ω: 1.9 W, 6.4 W 120 Ω: 800 mW, 2.7 W 300 Ω: 320 mW, 1 W 600 Ω: 160 mW, 533 mW Tube type: 2 x 6922 Electro-Harmonix Output impedance (unbalanced, balanced): 0.45 ohm, 0.9 ohm Frequency response: 2 Hz – 200 kHz ± 0.5 db Input sensitivity: 2.2 V RMS Input impedance: 100 kOhm Output polarity: Selectable by remote control Volume regulator: 2 x Burr Brown PGA2310 (180 steps 0.5 dB) THD: 0.1% @ 11 W 100 dB Max input voltage: 4.4 V RMS Max output voltage (unbalanced, balanced): 10 V RMS, 20 V RMS Preamplifier gain: 9 db Outputs: 1 x balanced XLR, 1 x RCA Connections Analog line inputs: 1 x balanced XLR, 4 x RCA Digital inputs (optional HiDac Mk2 board required): 1 x USB B, 1 x S/PDIF coaxial, 1 x S/PDIF optical Outputs: 1 x pre out RCA (pre-output phase can be selected), 1 x pre out balanced XLR, 1 x 6.3 mm headphone, 2 x 4 pin XLR Power consumption: 110 W Dimensions (WHD): 11" x 14.56" x 7" Weight: 27.5 lb (12.5 kg)
