RockaMarka88
Member
Hi, everyone.
I am a new arrival on QuadraphonicQuad. I apologise if this has been covered before, but I was wondering if anyone could help me.
I caught the quadraphonic bug some time ago, and after using the SQ system, I soon became very intrigued about CD-4. I recently invested in a new old stock JVC 4DD-5 demodulator (with low capacitance cables included), and an Audio-Technica AT20SLa cartridge, capable of tracking frequencies up to 50kHz.
However, there seems to be no separation between the front and rear channels, i.e. what should only be heard in one speaker can be heard in both front and rear. So essentially, it’s more like 2-channel stereo with four speakers than discrete 4-channel.
I’ve tried calibrating the demodulator with the adjustment record included in the box. As instructed in the manual, I lowered the front and raised the rear speaker volume, then turned the CD-4 Adjust screws at the back of the unit so that the sound from the rear was at its lowest. I also adjusted the 30kHz screw at the bottom until there was no distortion. The CD-4 radar light illuminates when playing Quadradisc records like it should, but the front and rear still mirror each other, sounding no different to 2-channel stereo.
Could anyone please advise me on what I might be doing wrong? Could I have connected something incorrectly, or bought the wrong equipment?
These are the connections I have made:
![3861871C-032F-4AAD-B3AB-774B9A985885.jpeg 3861871C-032F-4AAD-B3AB-774B9A985885.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57498-5489aee5df5a04240e2bae80179f52d0.jpg)
![809509F3-7532-4D3C-9047-F4859766867B.jpeg 809509F3-7532-4D3C-9047-F4859766867B.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57496-84d98f14e5df1f15e85f36d475f3f411.jpg)
![CFBADD19-A2DC-493F-9E0C-8F488F0BBE5A.jpeg CFBADD19-A2DC-493F-9E0C-8F488F0BBE5A.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57497-e6ddb66151c8e3fe96a975f2bfab5096.jpg)
I am using the following equipment:
Turntable: Audio-Technica AT-LP120XUSB
Cartridge: Audio-Technica AT20SLa
CD-4 Demodulator: JVC 4DD-5
Receiver: Realistic QTA-753
Speakers (x4, of course!): Wharfedale Glendale XP3
Any assistance would be greatly appreciated.
Mark.
I am a new arrival on QuadraphonicQuad. I apologise if this has been covered before, but I was wondering if anyone could help me.
I caught the quadraphonic bug some time ago, and after using the SQ system, I soon became very intrigued about CD-4. I recently invested in a new old stock JVC 4DD-5 demodulator (with low capacitance cables included), and an Audio-Technica AT20SLa cartridge, capable of tracking frequencies up to 50kHz.
However, there seems to be no separation between the front and rear channels, i.e. what should only be heard in one speaker can be heard in both front and rear. So essentially, it’s more like 2-channel stereo with four speakers than discrete 4-channel.
I’ve tried calibrating the demodulator with the adjustment record included in the box. As instructed in the manual, I lowered the front and raised the rear speaker volume, then turned the CD-4 Adjust screws at the back of the unit so that the sound from the rear was at its lowest. I also adjusted the 30kHz screw at the bottom until there was no distortion. The CD-4 radar light illuminates when playing Quadradisc records like it should, but the front and rear still mirror each other, sounding no different to 2-channel stereo.
Could anyone please advise me on what I might be doing wrong? Could I have connected something incorrectly, or bought the wrong equipment?
These are the connections I have made:
![3861871C-032F-4AAD-B3AB-774B9A985885.jpeg 3861871C-032F-4AAD-B3AB-774B9A985885.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57498-5489aee5df5a04240e2bae80179f52d0.jpg)
![809509F3-7532-4D3C-9047-F4859766867B.jpeg 809509F3-7532-4D3C-9047-F4859766867B.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57496-84d98f14e5df1f15e85f36d475f3f411.jpg)
![CFBADD19-A2DC-493F-9E0C-8F488F0BBE5A.jpeg CFBADD19-A2DC-493F-9E0C-8F488F0BBE5A.jpeg](https://cdn2.imagearchive.com/quadraphonicquad/data/attachments/57/57497-e6ddb66151c8e3fe96a975f2bfab5096.jpg)
I am using the following equipment:
Turntable: Audio-Technica AT-LP120XUSB
Cartridge: Audio-Technica AT20SLa
CD-4 Demodulator: JVC 4DD-5
Receiver: Realistic QTA-753
Speakers (x4, of course!): Wharfedale Glendale XP3
Any assistance would be greatly appreciated.
Mark.