Frank stereo ultra linear buizenversterker in absolute topstaat! 30 watt per kanaal en een geweldige sound. Een juweel voor gemaakt van de mooiste materialen uit de jaren 60 Frank Pram 30 watts Ultra-linear Stereo tube amplifier. Output power: 15 W per channel Damping factor: 14, per channel Transformers: ultra-linear type Symmetrical push-pull output stages, in Class AB Negative feedback: global on each amplifier (20 dB), plus 6 dB additional Frequency response: 8 Hz to 80 kHz Harmonic distortion: 0.1% at 10 watts Intermodulation distortion: 0.4% at 10 watt Tone control ranges: bass +15 to -15 dB at 50 Hz, treble +13 to -16 dB at 10 kHz Cut-off filters: rumble -12 dB at 30 Hz, scratch -25 dB at 8 kHz Loudness: according to Fletcher-Munson curves, 15 dB at 40 Hz Inputs: magnetic pick-up: sensitivity 3 mV, impedance 40 kΩ tuner, tape, TV, aux: sensitivity 100 mV, impedance 500 kΩ Output in 4 modes: Channel A, Channel B, Stereo, Reverse Stereo Balance control. Mono-Stereo switch.