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F7 Power Amplifier

The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET

topology with fewer parts than any First Watt amplifier to date and incorporating

a very interesting balance of very low negative voltage feedback and a little bit of

positive current feedback to give an astonishing measure of control over reactive

loudspeaker loads.

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 labor for 3 years, not covering shipping costs or consequential damages.

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First Watt F7 Stereo Power Amplifier

Made in California, USA

$7,895

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F7 Power Amplifier

The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET

topology with fewer parts than any First Watt amplifier to date and incorporating

a very interesting balance of very low negative voltage feedback and a little bit of

positive current feedback to give an astonishing measure of control over reactive

loudspeaker loads.

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 labor for 3 years, not covering shipping costs or consequential damages.

Reviews

There are no reviews yet.

Be the first to review “First Watt F7 Stereo Power Amplifier”

Your email address will not be published.

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