Soundcraftsmen DX4100 preamplifier & equalizer
SERVICED:
-replaced all electrolytic capacitors
-replace phono input caps with metal film upgrade
-replaced all opamp ICs with new Texas Intruments ICs
-add decoupling caps to ICs to increase S/N (up to 108dB @2V in preamp section!)
-lubed pots and switches
-resoldered all switch pins
-replaced all sliders and PCB with Bourns sliders and Stereo Phoenix PCB
-calibrate light balance
-test S/N and THD
-paint covers and touch up face plate
DX4100 Preamplifier/Equalizer, with built-in conventional line outputs
plus separate bridging line outputs
for mono bridging of most amps. Features 2 external
signal-processor loops; 2 phone inputs; 2 tape inputs
with 3-way dubbing; phono S/N 97 dB, THO 0.01%;
12 dB EQ boost and cut for each octave, max. 18 dB;
Differential/Comparator circuitry for 0.1 dB Unity Gain
Soundcraftsmen DX4100 preamplifier & equalizer
SERVICED:
-replaced all electrolytic capacitors
-replace phono input caps with metal film upgrade
-replaced all opamp ICs with new Texas Intruments ICs
-add decoupling caps to ICs to increase S/N (up to 108dB @2V in preamp section!)
-lubed pots and switches
-resoldered all switch pins
-replaced all sliders and PCB with Bourns sliders and Stereo Phoenix PCB
-calibrate light balance
-test S/N and THD
-paint covers and touch up face plate
DX4100 Preamplifier/Equalizer, with built-in conventional line outputs
plus separate bridging line outputs
for mono bridging of most amps. Features 2 external
signal-processor loops; 2 phone inputs; 2 tape inputs
with 3-way dubbing; phono S/N 97 dB, THO 0.01%;
12 dB EQ boost and cut for each octave, max. 18 dB;
Differential/Comparator circuitry for 0.1 dB Unity Gain
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