First Watt är en slutstegs-serie från legendariske konstruktören Nelson Pass. First Watt F7 lämnar 2x20Watt i 8Ohm i Ren Klass A.
2 x 20W Klass A, Push/Pull. Mosfet transistorer. 1 par Rca ingångar.
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.
Specifikation:
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
* Mått per enhet (BxHxD): 43 x 13 x 44cm
* Vikt:
Läs mer på: www.firstwatt.com