Back in the early 70s quadraphonic sound was a big thing 4 speakers , the problem was there was different systems like VHS and betamax , a simple version "matrix" could take any stereo source and decode it into 4 channel.
recently I got a from EBAY a realistic (Tandy) qutravox 4ch decoder the little box is wired into the speaker terminals and you plug your speakers and ad a rear pair
the result is excellent with sound coming out the rear speakers radio jingles come over very good and classical music is also excellent . I prefer 4 speakers for music than using Dolby pro logic with 7 speakers and boom box this better for TV and DVD any one else into 4ch stereo
recently I got a from EBAY a realistic (Tandy) qutravox 4ch decoder the little box is wired into the speaker terminals and you plug your speakers and ad a rear pair
the result is excellent with sound coming out the rear speakers radio jingles come over very good and classical music is also excellent . I prefer 4 speakers for music than using Dolby pro logic with 7 speakers and boom box this better for TV and DVD any one else into 4ch stereo





