Rated Output Power: 60 watts RMS Total Harmonic Distortion: Less than 2% from 50Hz to 15kHz Frequency Response: -2dB, 20Hz to 20kHz Input Sensitivity: High-impedance, 300mV; low-impedance balanced, with optional transformer, 75mV Hum and Noise: 85dB below rated output Output Loads: 8-ohm/25V, 16-ohms, 25VCT, 70V Output Regulation: Better than 2dB from no load to full load Input Impedances: High-impedance, 50k-ohms unbalanced; low-impedance, 600 ohms, balanced or unbalanced; 1:1 bridging with accessory transformer Lo-cut Filter: -10dB at 100Hz (switch-selectable) Controls and Indicators: Front Panel — Illuminated on/off power switch Rear Panel — Input level control, circuit breaker reset, lo-cut filter switch Power Consumption: 120V AC, 60Hz, 180W at full rated output Overload Protection: Transient protection diodes, electrical circuit breaker, 221°F (105° C) thermostat Operating Temperature Range: -4°F to +131°F (-20° to +55° C) at rated output Auxiliary Receptacle (not switched): Three-wire grounded,* 300W maximum Dimensions: 15-1/4"W x 3-1/2"H x 8"D Finish: Black Weight: 19 lbs. Accessories: Model TL600, 600-ohm line-matching transformer; Model TL100, 1:1 ratio transformer Model RPK53 rack panel brackets