Soundcraftsmen DX4000 pre-amplifier *Fully Serviced*
Soundcraftsmen DX4000 pre-amplifier
SERVICED:
*All electrolytic capacitors replaced with quality Nichicon audio capacitors
*replaced all 4 op-amp ICs with new Texas Instruments
*added decoupling capacitors to each IC
*upgraded phono input capacitors to metalized film caps, instead of original electrolytics
*switches and potentiometers cleaned/lubed with Deoxit and worked in
*melted in new solder on all switch pins
*stripped and repainted cover
*installed new rubber feet
*tested; all inputs and outputs tested
This is a great versatile pre-amp with 4 inputs and 2 tape input/loops and 3 signal processor loops(2 rear, 1 front). It also has Auto-bridge outputs for bridging any pair of traditional amps. It has had all electrolytic capacitors replaced and all switches and potentiometers cleaned and worked with Deoxit. All 4 op-amps replaced with new chips from Texas Instruments. All inputs and outputs have been tested and properly working. Also upgraded the phono input capacitors to metalized film caps. Cover was stripped down and repainted. It was then cleaned and face-plate polished.
Specifications:
-frequency response= 5hz-100Khz +/- 0.25dB
-phono frequency response= 20hz-20Khz +/- 0.5dB
-total harmonic distortion= <0.01% @1V
-intermodulation distortion= <0.01% @1V
-phono impedance= 47K ohm
-phono S/N= 97dB
Soundcraftsmen DX4000 pre-amplifier
SERVICED:
*All electrolytic capacitors replaced with quality Nichicon audio capacitors
*replaced all 4 op-amp ICs with new Texas Instruments
*added decoupling capacitors to each IC
*upgraded phono input capacitors to metalized film caps, instead of original electrolytics
*switches and potentiometers cleaned/lubed with Deoxit and worked in
*melted in new solder on all switch pins
*stripped and repainted cover
*installed new rubber feet
*tested; all inputs and outputs tested
This is a great versatile pre-amp with 4 inputs and 2 tape input/loops and 3 signal processor loops(2 rear, 1 front). It also has Auto-bridge outputs for bridging any pair of traditional amps. It has had all electrolytic capacitors replaced and all switches and potentiometers cleaned and worked with Deoxit. All 4 op-amps replaced with new chips from Texas Instruments. All inputs and outputs have been tested and properly working. Also upgraded the phono input capacitors to metalized film caps. Cover was stripped down and repainted. It was then cleaned and face-plate polished.
Specifications:
-frequency response= 5hz-100Khz +/- 0.25dB
-phono frequency response= 20hz-20Khz +/- 0.5dB
-total harmonic distortion= <0.01% @1V
-intermodulation distortion= <0.01% @1V
-phono impedance= 47K ohm
-phono S/N= 97dB
Soundcraftsmen DX4000 pre-amplifier
SERVICED:
*All electrolytic capacitors replaced with quality Nichicon audio capacitors
*replaced all 4 op-amp ICs with new Texas Instruments
*added decoupling capacitors to each IC
*upgraded phono input capacitors to metalized film caps, instead of original electrolytics
*switches and potentiometers cleaned/lubed with Deoxit and worked in
*melted in new solder on all switch pins
*stripped and repainted cover
*installed new rubber feet
*tested; all inputs and outputs tested
This is a great versatile pre-amp with 4 inputs and 2 tape input/loops and 3 signal processor loops(2 rear, 1 front). It also has Auto-bridge outputs for bridging any pair of traditional amps. It has had all electrolytic capacitors replaced and all switches and potentiometers cleaned and worked with Deoxit. All 4 op-amps replaced with new chips from Texas Instruments. All inputs and outputs have been tested and properly working. Also upgraded the phono input capacitors to metalized film caps. Cover was stripped down and repainted. It was then cleaned and face-plate polished.
Specifications:
-frequency response= 5hz-100Khz +/- 0.25dB
-phono frequency response= 20hz-20Khz +/- 0.5dB
-total harmonic distortion= <0.01% @1V
-intermodulation distortion= <0.01% @1V
-phono impedance= 47K ohm
-phono S/N= 97dB