First Watt F7 Stereo Amplifier
First Watt F7 Stereo Amplifier

F7 Stereo Amplifier

First Watt
Regular price
Sale price

Have any questions? Call Us

Unique two-stage push-pull amplifier.  Very little feedback, a little positive current feedback gives this amplifier a unique sound and great control. 

20 watts per channel, low output impedance (high damping factor), and a relatively low input impedance of 10K ohms. 

As close to a perfectly transparent amplifier as you are going to see.


Nominal specifications:

Measured at 120 V AC and an 8 ohm load:

Distortion @ 1 watt 0.05%
Output power 8 ohms
20 watts @ 2% THD, 1 kHz
Output power 4 ohms

30 watts @ 3% THD, 1 kHz

Input Impedance
10 Kohms
14.5 dB
Damping Factor
Input Sensitivity (1 watt)


0.53 V

Input Sensitivity (max output)

2.7 V

Output Noise
100 uV unweighted 20 - 20 kHz
Power consumption
170 watts

3AG slow blow type -

2.5 Amp for 120VAC

1.25 Amp for 240 VAC