First Watt F7 Power Amplifier

The owner’s manual can be downloaded here: F7 Owner’s Manual

Here is a link to a review of the F7 at 6moons

Nominal specifications:

Measured at 120 V AC and an 8 ohm load:
Distortion @ 1 watt 0.05%
Input Impedance: 10 Kohm
Gain: 14.5 dB
Input Sensitivity (1 watt) 0.53 V
Input Sensitivity (max output) 2.7 V
Damping Factor: >100
Output power 8 ohms: 20 watts @ 2% THD, 1KHz
Output power 4 ohms: 30 watts @ 3% THD, 1KHz
Class A envelope: 40 watts peak @ 4 ohms
Frequency response: DC to -3 dB @ 100 KHz
Noise: 100 uV unweighted, 20-20 KHz
Power consumption: 170 watts
Fuse: 3AG slow blow type – 2.5 Amp for 120VAC 1.25 Amp for 240 VAC
Warranty: Parts and labour for 3 years, not covering shipping costs or consequential damages.