inputs.text: good low level loudness compensated listening headphones - kinter handover hifi stereo ma170 amplifier compact two integrated circuit two channel amplifier extruded red aluminum case 146x260x4055 [ 495 mounting flange ] black front rear panels secured case 8 screws two additional screws heat sink power output ic case front panel secured electronics three hex nuts washers case mounting flange secure unit mobile device no rubber feet supplied front panel three chrome plastic knobs bass volume treble chrome plastic push button onoff switch rear panel two rca inputs left right channel input four connections speaker wire push spring loaded input 12vdc left right channels reversed input output output common ground speakers output capacitor coupled 1000 uf capacitor amplifier inverting input output provides 16 watts peak peak output 4 ohms translates 2 watts average rms 4 ohms speakers bass treble controls highly interactive not act traditional bass treble controls operation volume control illuminated color changing led not appear relationship music played colors orange red yellow green blue front panel bass treble knobs labeled 10 10 relative 25 marks control treble control affects midrange treble bass control also affects midrange treble lowest setting device selling approximately 1000 plus cost shipping power supply model ordered supplied klapnb008 12v 4 rohs power supply zitrades a12v 2 ch mini digital audio power amplifier amp hifi mp3 carn kinter ma170 zitrades original 3prong power supply zitrades 2620 amazon crossover distortion 2 v peak peak output listening headphones avoids area listening efficient speakers avoids area 1 volt peak output 8 ohms 125 milli watts peak speakers sufficiently loud 60 mill watts peak input 1 khz square wave input onset clipping 4v peak 8 v peak peak giving peak peak power output 16 watts peak power output 4 watts rms power output 196 watts 4 ohms 8 ohms measurements 8 watts peak peak 2 watts peak 1 watt rms average 8 ohm speakers maximum output current would 1 amp 4 ohms would 2 amps used 1 amp switching power supply amazon 56 worked fine however since 1 amp power supply not grounded not three prong ac plug amplifier low hum case touched went away using zitrades power supply tone controls interactive moving bass control minimum 9 oclock significantly affects midrange treble may indicate loudness compensation listening amplifier headphones avoids crossover distortion tone controls set pleasing loudness compensated response preferred setting treble minimum advancing bass minimum achieve pleasing loudness type sound headphones accurate speakers not listen speakers limited frequency response