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quad

  1. josephdaniel

    A Practical Application For Discrete Quadraphonic Sound in 2026 with Modern Source Material

    Hello all, I have a Pioneer QX-949 that I spent a good deal of time rebuilding and listening to. Since completing the rebuild I have been listening to original source material recorded in quad. The matrix modes are interesting, but not very good and lack good channel separation. CD-4 albums...
  2. dschulma

    McIntosh, Krell, Conrad Johnson -- High-End Vintage Audio Online Auction

    Jul 30 @ 7:00 pm – Aug 13 @ 7:00 pm Click HERE to view the catalog, register and bid This auction brings together one of the finest selections of vintage high-end audio components we’ve had the pleasure of offering. Whether your passion is classic American tube gear, high-end solid-state, or...
  3. a.munk

    Iwata 300 replica + quad 306 + ?

    Hi AK crew, Im on the search for a compression driver to join the iwata 300 replicas im building out of bio resin and flax. i have a quad 306 that i use with my current hornsbut i think a update is needed for the cd's. what do you think will pair well with the iwata and quad? Im tempted by a...
  4. J

    Quad 303 repair

    I'm finally restoring my inherited Quad 303! I'm following this guide: https://www.rs-online.com/designspark/refurbishing-a-classic-quad-303-amplifier I've replaced all the capacitors and everything went good ;) Now to the problem: Adjust RV100 for 33.5 volts between tags 5 and 9 One of...
    • jr2joao
    • Thread
    • quad quad 303 repair
    • Replies: 0
    • Forum: DIY
  5. Damien A

    Need help with Pioneer QX 8000

    Picked up this Pioneer QX 8000 yesterday. I thought it was running smoothly and sounded great. I had the receiver on, but volume all the way down, when I suddenly heard a pop through the speaker of the left channel. Now the left channel is pretty much gone. I can hear the music when I turn the...
    • Damien A
    • Thread
    • old stereo equipment pioneer pioneer qx pioneer qx 8000 quad receiver stereo stereo receiver
    • Replies: 1
    • Forum: Pioneer Audio
  6. K

    Is it worth buying quad L-ite satellite speakers?

    Hello, I wanted to ask if buying Quad L-ite satellite speakers makes sense (I mean only the satellite speakers, i.e. without a subwoofer and a central speaker. I would use them in a small room of about 10m2. Previously I had Tannoy Mercury M2 and I liked their sound, but I decided to change...
    • kapuchahaha
    • Thread
    • quad quad 11l quad 12l quad l-ite tannoy m2
    • Replies: 0
    • Forum: Speakers
  7. S

    Thorens 125 MK II: Need Help Troubleshooting Sound Issue with Setup

    Gear: Preamp: Douk Audio T4 PLUS HiFi JAN5654 Tube Preamp Receiver: Quad Artera Stereo Power Amplifier The new turntable: Thorens 125 MK II (SME 3009 III, Audio Technica AT160ML) The old turntable: Technics SL-1210MK2 Speakers: B&W CM1 Headphones: Bose QuietComfort I’ve been working on...
  8. F

    Quad ESL 57's aging?

    I'm new to 57's. I bought a pair that sound great. I am looking for a pair for a friend and heard some that had been rebuilt about 10 years ago, I believe by Wayne Piquet. The appearance of the rebuild looked excellent, grills were off so I could see quite a bit. All panels worked, no difference...
  9. woodie63

    Building my system Amp/Tuner advice please

    Hi all, longtime vinyl hoarder here finally hoping to build a decent setup to take me back to my youth! I have just picked up a pretty mint Thorens TD 150 mkII which for sentimental reasons is going to be the TT (My Dad's TT when I discovered music in the 70s) Now looking to get a decent vintage...
  10. Steve White

    Opinions? Sansui 4000 to Sansui QR-6500 Quad

    Hi, Advice please I have a Sansui 4000 and love it. Looking at a Sansui Quad QR-6500 as I have 4 classic Klipsch legendary speakers so could do it. Is it worth the upgrade? My room is around 16x20' in size? Never heard quad and do not know anyone with it. Is the amp quality, sound...
  11. Dean Rantala

    Harman Kardon 900+, few questions

    Purchased this old gem some 15 years ago. Over the years, it has needed a couple transistors and a half-hearted re-cap of the 4 amp boards. A couple years back, one of the channels of the phono inputs went out, the noise in the amp section has become horrid and finally.... one channel has...
  12. BilboBaggins

    It's like Christmas!

    Well, after almost a year of renovations, I have started unpacking my storage unit. It has been a little frustrating because my wife wants to take it slow, and I want to assemble my IKEA Jerker Desk and set up my two stereo systems, but I started bringing things in on Wednesday evening, and got...
  13. Richard P

    Sansui QRX-3000 Driver Transistors

    I just finished repairing a QRX-3000 that had both front channels out - 2 outputs (2SD313), the output caps and the NPN drivers TR805 & TR806 (the schematic calls for 2SC634As but the original parts that were installed were 2SC1364s). Everything else tested good. I used 2SC1060s for the...
  14. Y

    SANSUI vintage

    I have just bought a SANSUI qs500 rear quad amp.thst i am doing somthing wrong or unit is bad.I get meters work to the musio but no sound no nothing hum or anything.I might have ut connected wrong,kinda crazy he said it worked a year ago but has no idea on hooking it up.any help would be great...
  15. ChicagoHiFi

    Harman Kardon 50+

    Hey everyone… I’m pretty new to the site and I’m looking for info on my Harman Kardon 50+. I bought this receiver for $100 locally in Chicago. It’s in really good condition and it sounds great. It’s also quad. But I can’t seem to find any info on it. There’s a hifi engine forum on it but that’s...
  16. C

    Celestion 44 owners? (Or 33s, 66s) probably others, too

    Morning all, just joined AK this morning. Within the last week, I’ve picked up a mint (or as close to as possible) pair of 44s which have been re-wired with Van Damme cable and re-capped. Previously owned the 15XRs and also have a pair of Castle Severn 2s. question is about amplification and...
    • CoolDTed
    • Thread
    • amplifier celestion 44 quad sansui
    • Replies: 2
    • Forum: Speakers
  17. David_NC

    Quadraphonic Setup - What's Needed?

    Recently, I started playing around with a JVC 4VR-5446 quad receiver and thought it might be kinda cool to try out a quad setup. I picked this up about 13 years ago from the original owner who was going into a care facility. His system consisted of a Dual 1228, the JVC receiver, a Kenwood...
  18. plndrm

    Fixed! 4300 Repair/Restore

    Hi Everyone, Sorry for the length of the post… I am looking to repair my fathers 4300 that is now in my possession, I broke it – I bought it. He ordered it on 5-Oct-1975 from a dealer in South (New) Jersey for $825. The following items were included; “Handbook of Instructions” (seriously who...
    • plndrm
    • Thread
    • 4300 capacitor film marantz quad receiever vintage
    • Replies: 36
    • Forum: Marantz Audio
  19. N

    Left front channel dead on QRX-5500

    As you may have guessed from the subject line, I am the proud owner of a sansui QRX-5500, whose front left channel is dead. I've checked everything, its not the speaker, the wire, balanced knob turned the wrong way, or anything like that. The channel is dead on both speakers A and B, and even...
  20. P

    Sansui QRX 6500 partial recap project

    Hi, I have a sansui QRX 6500 quad receiver. It still has all original parts and I do like the sound of it as it is now. Since it's a quad receiver with 2 separate amplifier sections, I feel tempted to perform a recap of the "front" amp section only and leave the "rear" section as is. This will...
  21. jeeem

    What do you know about this peculiar 1970 JVC quad receiver?

    I'm smitten, staring into the big green eyes of this JVC 4MM 4600. It's kind of delightful to me. Jeepers creepers. I can't decide: Is it ugly? Is it gorgeous? Both? JVC is one of those brands I know very little about -- although I had one of those slate-colored JVC double cassette decks in the...
  22. Stereoboy70

    QRX 3000

    Hello All. I’m having trouble adjusting the bias current on this receiver. I followed the service manual but when I try to adjust at fuse 1,3,4 I don’t get any movement in my miliamp meter. I changed out the pots with Bourne 200 ohm pots and still nothing. Fuse 2 I can adjust fine to 20ma but...
  23. HoltHill

    SOLD - Quad ESL 988 Electrostatic Speakers, Serviced by Sheldon Stokes, Available for Demo, $2,200

    SOLD! I am very excited to be offering a very unique speaker for sale at the HHA showroom. I have a pair of Quad 988 electrostatic speakers available. These speakers have been fully restored by Sheldon Stokes at SDS Audio Labs in Grantham, NH. Sheldon is the de facto ESL expert in the US and...
  24. cometphoton

    Akai CR-80D-SS Help me ID the device not on the schematic

    First of all let me explain my approach. I am a novice at making repairs, my electrical background is PLC controls so I understand what the parts are in the schematic. I can try to trouble shoot the circuits but I choose to replace all the parts when I identify a fault. I guess we could remove...
    • cometphoton
    • Thread
    • 8 track 8track akai cr-80d-ss diode quad
    • Replies: 4
    • Forum: DIY
  25. P

    Marantz 2265 vs. Quad 34/405

    Hello! As I am constantly on the lookout for nice vintage audio equipment, I got into the position to buy myself both a Marantz 2265 and a Quad 34+405 for cheap as both the Quad 34 and the Marantz 2265 were in need of a recap. The Quad 405 was already serviced some years ago and was in good...
    • Pepijn
    • Thread
    • comparison marantz marantz 2265 quad quad 34 quad 405 recap vs.
    • Replies: 2
    • Forum: Solid State
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