... circuit is very complete 3.High-end switch amplifier. T-38 pro amplifier specifications: Specifications Impedance T18 T20 T22 T24 T32 ... ,±0,2 dB/8 Hz-50kHz,+0,-3 dB 14 kΩ balancedselectable:26 dB,32dB,or 1,4 V input sensitivityincrush ... )/21.3×5.3×21.3 inches pro amplifier (T-38)