Soundcraftsmen MA5002A power amp *NEW CAPS & TRANSISTORS*
SERVICED:
-cleaned pots and switches
-replaced all electrolytic capacitors with quality parts
-replaced the 4 large power capacitors (these are large and expensive)
-replaced every transistor in amplifier with modern upgrades and matched differential pairs
-installed gold plated RCA jacks
-set transistor bias current
-painted covers and cleaned face
-installed new rubber feet
-tested distortion and noise
-played on system
The old parts are in the last photo
Specifications:
-Class H amp with Variportional circuitry and Autobuffer for continuous operation into 2 ohm
-Auto-crowbar protection circuit for protection without current limiting
-20 LED power meters
-THD less than .05% (typical 0.01%)
-IMD less than .05% (typical 0.02%)
-TIMD less than .02%
-S/N greater than 110 dB
-slew rate greater than 50 volt/microsecond in stereo, >100v/uS bridged
-output power at rated distortion: 250 watt @8 ohm, 375 watt @4ohm -per channel
-class H design reduces power consumption by 1 kilowatt every 5 hours compared to typical amps in the same wattage.
-runs cool because of efficient class H and requires no cooling fan. Makes for a quiet listening environment.
SERVICED:
-cleaned pots and switches
-replaced all electrolytic capacitors with quality parts
-replaced the 4 large power capacitors (these are large and expensive)
-replaced every transistor in amplifier with modern upgrades and matched differential pairs
-installed gold plated RCA jacks
-set transistor bias current
-painted covers and cleaned face
-installed new rubber feet
-tested distortion and noise
-played on system
The old parts are in the last photo
Specifications:
-Class H amp with Variportional circuitry and Autobuffer for continuous operation into 2 ohm
-Auto-crowbar protection circuit for protection without current limiting
-20 LED power meters
-THD less than .05% (typical 0.01%)
-IMD less than .05% (typical 0.02%)
-TIMD less than .02%
-S/N greater than 110 dB
-slew rate greater than 50 volt/microsecond in stereo, >100v/uS bridged
-output power at rated distortion: 250 watt @8 ohm, 375 watt @4ohm -per channel
-class H design reduces power consumption by 1 kilowatt every 5 hours compared to typical amps in the same wattage.
-runs cool because of efficient class H and requires no cooling fan. Makes for a quiet listening environment.