I received this e-mail from a reader, and thought I'd post it along with my reply.
In the past I have written to you a couple of times with questions in regards to Stereo systems in which you were kind enough to answer. For some reason i have lost your other e-mail address but have located this one.
As you know back in the 1970s during the Quadraphonic rage Hafler had a simple 4 channel box called the Quadadaptor marketed by Dynaco. Around the same time Realistic/Radio Shack had brought out a similar item known as Quatravox. I believe it was the same principle as the Hafler Model.
Anyway back then I had one of the Realistic Quatravox units and had lots of fun with it as it extracted the ambience hidden in most 2 channel recordings. I have recently acquired one of these again brand new. Back then I had a low powered system consisting of a Receiver, turntable, and tape deck.
The neat thing about this Quatravox is there was no extra amplification needed for the rear channels and you only needed 4 speakers. It had 3 switches and 2 knobs. It had no power cord as it required no wall power.
Switch one was for straight 2 channel or adding the Quatravox.
Switch two was for Surround A or B
Switch three was Rear or Out
Knob one was for Blend
Knob two was for Rear Level
In essence I guess it really didn't alter the signal at all only extracting what was already there. Please correct me if I am wrong on this point.
My questions to you before hooking it up are
1. Would it be safe to use this unit with the 2 channel system I own today consisting of a Sony XA7ES cd player running direct through a Bryston 4BST 250 w/ch Amplifier. (I use no pre amp.) Speakers are ATC 19s
2. This Quatravox unit has RCA jacks for all connections including the Speakers. I use 12 gauge speaker wire now and would purchase quality RCA jacks and solder the speaker wire to them using the bare ends which would be connected as usual to the Amp and speakers and adding the RCA jacks to the opposite end for the connection to the Quatravox. Is there any danger using this setup with bare wire leads on one end and RCA on the other as long as everything is wired correctly and in phase.
An answer would be most appreciated before I go through all the trouble of purchasing and soldering the higher quality RCA jacks and most of all I do not want to damage my amp and or speakers.
I have read about surround systems in your Guide To High End Audio Book that i own but understandably there is not to much on Quadraphonics as it is pretty much a thing of the past. I am not interested in Home Theatre but i did enjoy the effects of this simple gadget years ago and for that reason and its simplicity it would be fun once again and good enough for me. I may even go as far as selling the ATC19s and purchasing a set of four smaller speakers such as the Totems or Proac models.
Thanks for your time.