Parasound NewClassic 2125 v.2 Two Channel Power Amplifier Crafted with reliable class AB amplifier technology, the Parasound NewClassic 2125 v.2 Two Channel Power Amplifier upholds the same stringent quality and performance benchmarks that Parasound is known for. This exceptional audio device promises superior sound quality, as well as long-lasting reliability and enjoyment for its users. Key Features: THX Ultra2 certified 150 watts x 2 into 8 Ω (all channels driven) Two pairs of speaker outputs with front panel A/B buttons High pass filter, switchable for 20Hz or 40Hz Automatic on/off by DC trigger or audio signal Fully discrete circuitry with high current toroid transformer Bridging switch for stereo or mono operation Gold plated input jacks and binding posts Specifications: All Channels Driven150 watts x 2, 8Ω225 watts x 2, 4Ω225 watts x 2, 2Ω (Load switch set to 2-3Ω) Bridged Mono400 watts x 1, 8Ω400 watts x 1, 4Ω (Load switch set to 2-3Ω) Current Capacity35 amps peak per channel Frequency Response20 Hz - 50 kHz, +0/-3 dB, 1 wattDynamic Headroom - 1.3 dB Total Harmonic Distortion0.25% at full rated output0.015% at average listening levels IM Distortion - 0.05 %Transient IM Distortion - Not measurable S/N Ratio114 dB at rated output, IHF A-weighted106 dB at rated output, unweighted93 dB at 2.828 V output, IHF A-weighted84 dB at 2.828 V output, unweighted Input Impedance - 33 k Ω Input Sensitivity1 V in for 28.28 V out, THX standard Inter-Channel Crosstalk85 dB @1 kHz, 73 dB @10 kHz, 67 dB @ 20kHzDamping Factor - Over 150 at 20Hz12V Trigger Turn On - DC 9 – 12V, 15 mA Audio Turn OnQuieter: 1 mVLouder: 6 mV AC Power Requirement110 - 120 V / 220 -240 V, 50 - 60 Hz0.5 watts standby32 watts Idle (no audio)550 watts full output Dimensions171/4" Wide16" Deep, with cables connected4.25" High with feet, 3.5" panel only (2U)(437 x 406 x 107mm, 88.2 mm panel only) Net Weight - 27 lbs (12.3 kg) Rack Mount AccessoryMay be Purchased Separately: RMK22