Soundcraftsmen SP4002 preamp / EQ *RESTORED* *NEW SLIDERS*
SP4002 preamp - equalizer
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series, ULK series in phono section
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned
*calibrated comparator LEDs and gain with signal generator
*all sliders and PCB replaced with new Bourns sliders
*replaced all opamps with new Texas Instruments ICs
*added film decoupling capacitors to all ICs
*repainted panels
*cleaned and tested for THD, S/N
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked. All sliders were replaced with new Bourns sliders on a custom Stereo Phoenix PCB, only offered here. The unit was then tested. This was the top model with the most features and this one works as good as you will find and you know it will sound as good as it can. It has hand tuned inductive coils that are the real thing, unlike most EQs that use ICs to mimic the effect. This was an upgrade over the lower models and provides higher S/N ratio and boost/cut. Cover and side panels were repainted. Front face-plate and knobs cleaned. Looks great! . Check out my other audio gear for sale!
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
Don't be fooled by the imitators that claim it's serviced in the title, because they took the cover off and sprayed out the pots and looked at it. No one services more Soundcraftsmen products than me. You can be assured you're getting the best.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*2x dual mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*tape dubbing
*low impedance headphone output
*2x tape loop input and outputs
*2x signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt
SP4002 preamp - equalizer
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series, ULK series in phono section
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned
*calibrated comparator LEDs and gain with signal generator
*all sliders and PCB replaced with new Bourns sliders
*replaced all opamps with new Texas Instruments ICs
*added film decoupling capacitors to all ICs
*repainted panels
*cleaned and tested for THD, S/N
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked. All sliders were replaced with new Bourns sliders on a custom Stereo Phoenix PCB, only offered here. The unit was then tested. This was the top model with the most features and this one works as good as you will find and you know it will sound as good as it can. It has hand tuned inductive coils that are the real thing, unlike most EQs that use ICs to mimic the effect. This was an upgrade over the lower models and provides higher S/N ratio and boost/cut. Cover and side panels were repainted. Front face-plate and knobs cleaned. Looks great! . Check out my other audio gear for sale!
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
Don't be fooled by the imitators that claim it's serviced in the title, because they took the cover off and sprayed out the pots and looked at it. No one services more Soundcraftsmen products than me. You can be assured you're getting the best.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*2x dual mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*tape dubbing
*low impedance headphone output
*2x tape loop input and outputs
*2x signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt
SP4002 preamp - equalizer
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series, ULK series in phono section
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned
*calibrated comparator LEDs and gain with signal generator
*all sliders and PCB replaced with new Bourns sliders
*replaced all opamps with new Texas Instruments ICs
*added film decoupling capacitors to all ICs
*repainted panels
*cleaned and tested for THD, S/N
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked. All sliders were replaced with new Bourns sliders on a custom Stereo Phoenix PCB, only offered here. The unit was then tested. This was the top model with the most features and this one works as good as you will find and you know it will sound as good as it can. It has hand tuned inductive coils that are the real thing, unlike most EQs that use ICs to mimic the effect. This was an upgrade over the lower models and provides higher S/N ratio and boost/cut. Cover and side panels were repainted. Front face-plate and knobs cleaned. Looks great! . Check out my other audio gear for sale!
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
Don't be fooled by the imitators that claim it's serviced in the title, because they took the cover off and sprayed out the pots and looked at it. No one services more Soundcraftsmen products than me. You can be assured you're getting the best.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*2x dual mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*tape dubbing
*low impedance headphone output
*2x tape loop input and outputs
*2x signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt