See Video for functionality, Be sure to look closely at the pictures because what you see, is what you get..Very nice receiver, almost in mint condition for a 49 years old Everything is working fine, all lights have been changed to LEDs. I would keep it but I am currently using a customized Sansui QRX 6001 as a preamp, and a Dynaco QSR 300 4 channel amp. The Sony FM tuner IMHO is the clearest and cleanest I have ever listened to among analog receivers. Very nice Phono section. It was tested by my tech @ 82 WPC X 2 and 41 WPC X 4 before clipping. This is a very heavy receiver, close to 43 lbs and 22 wide. TUNER SECTION Tuner FM Sensitivity :1,9µV (IHF)S/N ratio :70dBCapture ratio :1,2dBSelectivity :75dB (IHF)Image rejection :70dBIF rejection :100dBSpurious rejection :90dBAM suppression :54dBTHD :0,2% (400Hz, mono)0,5% (400Hz, stereo)FM separation :40dB (400Hz)FM frequency response :40Hz...15Khz (+0,5 / -1dB)AM THD :0,5%AM S/N ratio :50dBPREAMP SECTIONPreamp Inputs :Phono (5mV / 50kOhm)Phono low (2,5mV / 50kOhm)Microphone (1,5mV / 50kOhm)Tuner, Aux, Tape, DIN (250mV / 50kOhm)Outputs :rec-out (250mV / 10kOhm)DIN (30mV / 82kOhm)S/N ratio :72dB (phono)65dB (MIC)90dB (line)High filter :8Khz (6dB/oct.)Low filter :80Hz (6dB/oct.)Bass control :± 10dB at 100HzTreble control :± 10dB at 10KhzLoudness switch :+ 10dB at 50Hz / + 4dB at 10Khz (att. -30dB)SQ SectionTHD :0,2% (250mV input ; 2Khz)Frequency response :20Hz...20Khz (±3dB)S/N ratio :80dB (250mV input, IHF-A)MAIN SECTIONAmplifierRMS power :2x 80W (2 channels driven, 20Hz...20Khz, 8 Ohm)4x 30W (4 channels driven, 20Hz...20Khz, 8 Ohm)2x 280W (2 channel, peak, 4 Ohm)2x 216W (2 channel, peak, 8 Ohm)THD :0,5% at rated power (2 channel)0,2% at rated power (4 channel)IM :0,5% at rated power (2 channel)0,2% at rated power (4 channel)Bandwidth :15Hz...40Khz (IHF)Frequency response :10Hz...50Khz (1W output, +0/-2dB)S/N ratio :??Damping factor :25 (8 Ohm)GENERAL Dimensions :52 x 18,9 x 37cmWeight :18,3kg.List price :$800.00(1975) FEATURESFull-logic decoding of SQ sources Decoding of other 4-Channel matrix systems Enhancement of existing stereo programs Phase-Locked Loop IC for FM decoding MOS-FET FM front end Solid State IF filters IC IF stageCompletely shielded FM front end Pinpoint tune signal strength/multipath meter DC power amp system Provisions for 2 phono sources Provisions for 3 tape recorders (2x 2CH and 1x 4CH)Outputs for 2 sets of 4CH speakers4 VU meters and meter sensitivity switch, Individual level controls for each channel Master level control, Separate Bass & Treble controls for front & rear channels, Microphone mixing control, Loudness compensation, Low & High filters, FM interstation muting, Headphone jacks for 2 and 4CH use, Wooden cabinet included Courtesy of the Vintage KnobSelling as is with NO Returns, The Stereo will be packed well, the package will be insured. This is almost 50 years old and everything is working as it is supposed to, but there is no guarantee implied. I take my ebay seller feedback seriously and it is 100%. If I didnt sell items as described and pack shipments well, I would not have the 100% Rating. Message me with any specific questions.On Oct-11-23 at 18:17:35 PDT, seller added the following information: I copied a prior listing and DO NOT have the Box.  Im sorry for the mistake..On Oct-12-23 at 08:38:59 PDT, seller added the following information: The listing is locked but upon request I can message you a copy of the service receipt.  I am unable to post up a picture.

Description: For sale is a remarkable piece of vintage audio history, the Sony SQR-6650 Receiver. This receiver not only comes complete with its original box and manual but has also been put to the test, delivering excellent audio output via the AUX and Phono ports, as well as the AM/FM radio. Tested and Confirmed: AUX and Phono Ports: Both these inputs have been thoroughly tested, and they deliver outstanding audio quality. AM/FM Radio: The built-in radio function has also been tested, and it tunes in with clear reception, adding versatility to your audio setup. While the audio output is impressive, its essential to note that the potentiometers (pots) controlling various functions may exhibit some scratchiness. However, rest assured that this doesnt adversely affect the overall listening experience. Condition: The receiver shows signs of its age, including minor cosmetic wear, but it retains its vintage charm. Please be aware that other functions and features beyond those mentioned above have not been tested and may not work as intended. Only the functions detailed in the testing section have been confirmed to function correctly. This Sony SQR-6650 Receiver, packaged with its original box and manual, is an excellent find for collectors and enthusiasts of vintage audio equipment. Whether youre looking to add to your collection or appreciate the unique character of vintage sound, this receiver presents a fantastic opportunity. Feel free to reach out with any questions or for additional details. Dont miss the chance to own this piece of audio history that not only looks great but also delivers impressive audio performance. Ships through FedEx ground, USPS is used to provide you a quote since FedEx does not. Shipping refund given after shipping if applicable.

I fully tested each phone, tape and aux input and all are working accordingly. This is a beautiful receiver that came to me in the original box. It has one small mark on the top at the back edge. (I took a close up of it in one of the pictures)Compared to a smaller Technics from back in the day, this SONY sounds amazing. No comparison. I like that theres separate Bass and Treble for the front and rear speakers. As far as I can tell, this is almost in Mint Condition, other than the one mark on the top I mentioned earlier. It All knobs and buttons work accordingly. I didnt hear any crackling from the individual or master volume controls, and very very minimal only the first time I used the Bass and Treble knobs. After that, no crackling what so ever.All lights and meters worked accordingly as well. The FM tuner IMHO is the clearest and cleanest I have ever listened to among analog receivers. Was pulling in stations without any wire installed into the antenna. Very nice Phono section. It gives 80 watts RMS X 2 and 30 watts RMS X4. This is a very heavy receiver, close to 43 lbs and 22 wide. TUNER SECTIONFM Sensitivity :1,9µV (IHF)S/N ratio :70dBCapture ratio :1,2dBSelectivity :75dB (IHF)Image rejection :70dBIF rejection :100dBSpurious rejection :90dBAM suppression :54dBTHD :0,2% (400Hz, mono)0,5% (400Hz, stereo)FM separation :40dB (400Hz)FM frequency response :40Hz...15Khz (+0,5 / -1dB)AM THD :0,5%AM S/N ratio :50dB PREAMP SECTION Preamp Inputs :Phono (5mV / 50kOhm)Phono low (2,5mV / 50kOhm)Microphone (1,5mV / 50kOhm)Tuner, Aux, Tape, DIN (250mV / 50kOhm)Outputs :rec-out (250mV / 10kOhm)DIN (30mV / 82kOhm)S/N ratio :72dB (phono)65dB (MIC)90dB (line)High filter :8Khz (6dB/oct.)Low filter :80Hz (6dB/oct.)Bass control :± 10dB at 100HzTreble control :± 10dB at 10KhzLoudness switch :+ 10dB at 50Hz / + 4dB at 10Khz (att. -30dB)SQ SectionTHD :0,2% (250mV input ; 2Khz)Frequency response :20Hz...20Khz (±3dB)S/N ratio :80dB (250mV input, IHF-A) MAIN SECTION AmplifierRMS power :2x 80W (2 channels driven, 20Hz...20Khz, 8 Ohm)4x 30W (4 channels driven, 20Hz...20Khz, 8 Ohm)2x 280W (2 channel, peak, 4 Ohm)2x 216W (2 channel, peak, 8 Ohm)THD :0,5% at rated power (2 channel) 0,2% at rated power (4 channel)IM :0,5% at rated power (2 channel)0,2% at rated power (4 channel)Bandwidth :15Hz...40Khz (IHF)Frequency response :10Hz...50Khz (1W output, +0/-2dB)S/N ratio :??Damping factor :25 (8 Ohm) GENERAL Dimensions : 52 x 18,9 x 37cmWeight :18,3kg.List price :$800.00(1975)Optional accessory :RU-40 4CH wired remote-control FEATURESFull-logic decoding of SQ sourcesDecoding of other 4-Channel matrix systemsEnhancement of existing stereo programsPhase-Locked Loop IC for FM decodingMOS-FET FM front endSolid State IF filtersIC IF stageCompletely shielded FM front endPinpoint tune signal strength/multipath meterDC power amp systemProvisions for 2 phono sourcesProvisions for 3 tape recorders (2x 2CH and 1x 4CH)Outputs for 2 sets of 4CH speakers4 VU meters and meter sensitivity switchIndividual level controls for each channelMaster level controlSeparate Bass & Treble controls for front & rear channelsMicrophone mixing controlLoudness compensationLow & High filtersFM interstation mutingHeadphone jacks for 2 and 4CH useWooden cabinet included ***Info Courtesy of the Vintage Knob***

SONY SQR-6650 4-Channel Quadraphonic Receiver HiFi Vintage Description SONY SQR-6650 4-Channel / Quadraphonic Receiver from the ’70s. SQ and R-MTX decoders. Specification . Tested and fully working. Cleaned all potentiometers. Good used condition. Has minor scratches and marks of use. See pictures carefully for condition. Power in: 110-240V Dimensions: 434 x 144 x 345 mm Weight: 9.5kg Testing and collection are welcome. TS1 1RD Middlesbrough. General rules This is vintage equipment, which means they are made before 80s. If you are watching this auction, you would know what vintage equipment is. Any item that is made before the 1980s requires special care. You must have basic knowledge about the use and servicing of the equipment. So think, is this suitable equipment for you? I have to give such information, because I hah cases of customers who bought equipment, and couldnt put a cassette tape into a tape recorder or had a problem with connecting the amplifier. Remember, that after opening the parcel and checking the condition of the device, wait 12 hours before connectingthe device to the power supply. Temperature differences and external moisture may cause the device to malfunction or damage it. All items sold by me are cleaned and tested. I always describe things correctly and honestly. You always receive exactly what has been described and photographed on listing. However, sometimes things can go wrong and human error does occur. If you have any issues at all with your item, please get in touch with me and Ill endeavour to quickly and efficiently deal with your issue. Shipping Equipments are shipped within 2-3 business days of cleared payment. Delivery time is 1 business days after dispatch on Mainland via Yodel. Very heavy equipment over 30kg I send TNT/FedEx. If you have some special preference for delivery, please ask before you purchase/ bidding. All of our items are sent tracked which will update on your account once the item has been dispatched. International shipping, if it possible, is done via Global Shipping Programme. Other shippimg is possible after agreement (ask before bidding/purchase). Payment We accept the following payment methods: eBay Payment Method PayPal cash if collect Please contact us if you have any questions. Return policy You have 14 days to return the purchased device. When receiving the parcel, make sure that it is undamaged. In case of any doubts, take a picture. Any irregularities or faults must be reported immediately by eBay message. Please contact me before opening a return request. Many problems can be solved by phone or email. Item must be returned in original condition with valid security stickers and original box. Please keep all packaging until you are sure you will be keeping your item. Declimer All my equipments are security marked/tagged void stickers. If you try to repair the item yourself, or involve a third party to do this, a return (including partial refunds) will not be accepted so please get in touch with me, if there is an issue with your item before attempting to repair it yourself.Please contact me before opening a return request. Many problems can be solved by phone or email. Item must be returned in original condition with valid security stickers and original box. Please keep all packaging until you are sure you will be keeping your item.