dynaco MK IV / Mono Block Tube amps.

Specifications: - Power Output: 40 watts continuous, 90 watts peak - IM Distortion: Less than 1% at 40 watts, less than .05% at 1 watt - Frequency Response: ?.5 dB from 10 cps to 40 kc; ?.5 dB from 20 cps to 20 kc at 40 watts output - Power Response: 20 cps to 20 kc without exceeding 1% distortion within 1 dB of 40 watts - Sensitivity: 1.3 volts rms input for 40 watts output - Hum and Noise: Inaudible; 90 dB below 40 watts (choke filtering) - Damping Factor: 15. - Output Impedances: 4, 8, and 16 ohms - Tubes: EL-34 (2), 7199, GZ-34, selenium rectifier - Finish: bright nickel chassis, vinyl-coated charcoal brown cover - Special Features: Matched tubes, Dyna Biaset for non-critical adjustment, preamp power socket, fuse post, on-off switch - Power Consumption: 115 watts - Size: 5" by 14" by 6-1/2" high. - Weight: 20 pounds