Marantz Model 4230 AM/FM Stereo Quadraphonic Receiver & SQA-2 Adapter, Serviced
Vintage Marantz Model 4230 AM/FM Stereo Quadraphonic Quadradial Receiver & SQA-2 Adapter, Serviced Price: $1,774.99 + $74.99 Flat-rate ground shipping for US 48 states Description: Vintage, in really nice over-all condition, perhaps an 8 out of 10 for used gearSeller refurbished -- See NOTES below for services performed Thoroughly cleaned, tested and recondition to ensure all knobs and buttons are in very satisfactory conditionVery clean inside and out with no major marks or corrosion (please see our pictures)Exactly as seen in pictures -- very few marks on this receiver An electronic copy of the user's manual will be emailed to buyer, if requestedIncludes rare Marantz SQA-2 adapter installed, serial # 7755All work performed by MC Mobile, Thousand Oaks, CASix month parts and labor warranty NOTES: 1. Repaired issue with one of the right channel amplifiers (two amplifiers per board) 2. Repaired an issue in the pre-amplfier channels (capacitors and active devices) 3. Checked & renewed amp bridging circuits (discrete 4 channel or 2 channel bridged) 4. Checked & renewed circuit that sets amp low frequency cutoff 5. FM tuner aligned & MPX sensitivity maximized (FM/FM stereo performance is great) 6, AM tuner aligned 7. DC offset checked and adjusted to as close to zero as possible 8. Amplifier idle current checked and reset to factory specification 9. All controls cleaned, and balance slide pot lubricated 10. All inputs checked including the phono input and preamp 9. Continuous power output measured at low, mid, and high frequencies with power output at approximately 16 W per channel at clip into 8 ohms in 4 channel mode 10. Power output measured at 1 kHz into 8 Ohms in 2 channel (bridged) mode, and is approximately 38 W RMS per channel 11. Failed dial and indicator bulbs replaced with new 12. Permanent PCB fuse for front lighting replaced with standard AGC fuse holder and AGC fuse for easy replacement if ever necessary (see our pics) 13. Optional Marantz SQA-2 adapter installed and checked, so the receiver will do discrete quad and synthesized quad with the optional adapter A great 4230 receiver from our private collection with the rare second generation SQA adapter installed. The FM tuner performance is about the best we have seen for a Marantz receiver. If purchased, please do not disssamble or remove any part of this receiver including the SQA-2. If there are any issues, please contact us using the information from our tag on the bottom of the receiver. Some Original Specifications:Tuning range: FM, MWPower output: 30W/ch (stereo), 12W/ch into 4Ω (quadraphonic)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.9%Damping factor: 20Input sensitivity: 2.2mV (MM), 150mV (line)Dimensions: 17 21/64 x 5 25/64 x 14 3/8 inches (440 x 137 x 365 mm)Weight: 31.3 lbs (14.2 kg)First Year 1973 – Last Year 1978Wood Case WC-122, WC-22Channels Four + TwoSpeaker Connections: Two setsAC Switch YesOptions: RC4 Remote Control, Wood Case, Decoder
Specifications
| Return Shipping Will Be Paid By | Buyer |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Refund Will Be Given As | Money Back |
| Brand | Marantz |
| Model | 4230 |
| MPN | Does Not Apply |
| Country/Region Of Manufacture | Japan |
Vintage Marantz Model 4230 AM/FM Stereo Quadraphonic Quadradial Receiver & SQA-2 Adapter, Serviced Price: $1,774.99 + $74.99 Flat-rate ground shipping for US 48 states Description: Vintage, in really nice over-all condition, perhaps an 8 out of 10 for used gearSeller refurbished — See NOTES below for services performed Thoroughly cleaned, tested and recondition to ensure all knobs and buttons are in very satisfactory conditionVery clean inside and out with no major marks or corrosion (please see our pictures)Exactly as seen in pictures — very few marks on this receiver An electronic copy of the user’s manual will be emailed to buyer, if requestedIncludes rare Marantz SQA-2 adapter installed, serial # 7755All work performed by MC Mobile, Thousand Oaks, CASix month parts and labor warranty NOTES: 1. Repaired issue with one of the right channel amplifiers (two amplifiers per board) 2. Repaired an issue in the pre-amplfier channels (capacitors and active devices) 3. Checked & renewed amp bridging circuits (discrete 4 channel or 2 channel bridged) 4. Checked & renewed circuit that sets amp low frequency cutoff 5. FM tuner aligned & MPX sensitivity maximized (FM/FM stereo performance is great) 6, AM tuner aligned 7. DC offset checked and adjusted to as close to zero as possible 8. Amplifier idle current checked and reset to factory specification 9. All controls cleaned, and balance slide pot lubricated 10. All inputs checked including the phono input and preamp 9. Continuous power output measured at low, mid, and high frequencies with power output at approximately 16 W per channel at clip into 8 ohms in 4 channel mode 10. Power output measured at 1 kHz into 8 Ohms in 2 channel (bridged) mode, and is approximately 38 W RMS per channel 11. Failed dial and indicator bulbs replaced with new 12. Permanent PCB fuse for front lighting replaced with standard AGC fuse holder and AGC fuse for easy replacement if ever necessary (see our pics) 13. Optional Marantz SQA-2 adapter installed and checked, so the receiver will do discrete quad and synthesized quad with the optional adapter A great 4230 receiver from our private collection with the rare second generation SQA adapter installed. The FM tuner performance is about the best we have seen for a Marantz receiver. If purchased, please do not disssamble or remove any part of this receiver including the SQA-2. If there are any issues, please contact us using the information from our tag on the bottom of the receiver. Some Original Specifications:Tuning range: FM, MWPower output: 30W/ch (stereo), 12W/ch into 4Ω (quadraphonic)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.9%Damping factor: 20Input sensitivity: 2.2mV (MM), 150mV (line)Dimensions: 17 21/64 x 5 25/64 x 14 3/8 inches (440 x 137 x 365 mm)Weight: 31.3 lbs (14.2 kg)First Year 1973 – Last Year 1978Wood Case WC-122, WC-22Channels Four + TwoSpeaker Connections: Two setsAC Switch YesOptions: RC4 Remote Control, Wood Case, Decoder
