Soundcraftsmen DDR1200 power amplifier
Serviced:
-replaced all electrolytic capacitors
-replaced power capacitors with upgraded units
-replaced differential input transistors with matched upgrades
-tested power, noise, and distortion. (tested max of .0072% THD, 0.004% IMD)
-replaced SCR IC with zero-crossing triac IC for softer startup and less switching noise during uses
-repainted sheet metal covers
-installed new 3M feet
Power Amplifier, with 100-LED frequency
spectrum analyzer display. Features Class-H Vari-Portional circuitry; Autobuffer circuitry for continuous 2-ohm operation;
40-LED power output Meters from 0.02 up to 2,000 Watts; Truclip indicators for each ch; Mono
Bridging switch on rear panel. TIM < 0.02%; 250 W/ch
into 8 ohms; 375 W/ch into 4 ohms continuous RMS,
20-20,000 Hz, THD < 0.05%.
Soundcraftsmen DDR1200 power amplifier
Serviced:
-replaced all electrolytic capacitors
-replaced power capacitors with upgraded units
-replaced differential input transistors with matched upgrades
-tested power, noise, and distortion. (tested max of .0072% THD, 0.004% IMD)
-replaced SCR IC with zero-crossing triac IC for softer startup and less switching noise during uses
-repainted sheet metal covers
-installed new 3M feet
Power Amplifier, with 100-LED frequency
spectrum analyzer display. Features Class-H Vari-Portional circuitry; Autobuffer circuitry for continuous 2-ohm operation;
40-LED power output Meters from 0.02 up to 2,000 Watts; Truclip indicators for each ch; Mono
Bridging switch on rear panel. TIM < 0.02%; 250 W/ch
into 8 ohms; 375 W/ch into 4 ohms continuous RMS,
20-20,000 Hz, THD < 0.05%.
Image 1 of 19
Image 2 of 19
Image 3 of 19
Image 4 of 19
Image 5 of 19
Image 6 of 19
Image 7 of 19
Image 8 of 19
Image 9 of 19
Image 10 of 19
Image 11 of 19
Image 12 of 19
Image 13 of 19
Image 14 of 19
Image 15 of 19
Image 16 of 19
Image 17 of 19
Image 18 of 19
Image 19 of 19