I haven't seen this in these forums...
This is an interesting article and it describes the Hafler quad circuits, plus others. Pretty simple actually.
https://midimagic.sgc-hosting.com/quadmuse.htm#evmatmul
As it turns out I got four matching speakers laying around and the amps to drive them ( four Acoustic Energy AE1s and a bunch of amps...)... I was thinking of trying something like this is my office. I mean, I got two quad receivers but they are huge and won't fit on my desk... but a small decoder like the ones he described might be a fun project.
This is an interesting article and it describes the Hafler quad circuits, plus others. Pretty simple actually.
https://midimagic.sgc-hosting.com/quadmuse.htm#evmatmul
As it turns out I got four matching speakers laying around and the amps to drive them ( four Acoustic Energy AE1s and a bunch of amps...)... I was thinking of trying something like this is my office. I mean, I got two quad receivers but they are huge and won't fit on my desk... but a small decoder like the ones he described might be a fun project.
I now know that the Hafler decoder circuit is just a simple passive circuit for deriving 4ch sound from a 2ch source. Please ignore my previous post.
Hafler quad is pretty similar to Dolby Surround. Set your BD/DVD/UHD/media player for 2-channel output, and the rear channel info should be encoded so as to be compatible with the Hafler circuit.
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I tried the Hafler decoder back in the vinyl days. It was not listenable, the quad channels were mostly surface noise.
I'm just thinking of setting up a toy here... if I wanted to use a decoder, I could dig out the old Sony EP9ES from the closet and build something around it... or I already have a 7.0 in the den with a pre-pro....
Just noticed I got speakers and amps gathering dust and I figure it'd be fun to play around with my home office. Besides, I already have two complete receiver set ups ( with QS, SQ and CD4 decoders and wired remotes... don't want to go there for the time being.).
Sources will be digital, going through a high-rez DAC. So, I figured a small box would be fun to play with, no need for a delay to start with...
Just noticed I got speakers and amps gathering dust and I figure it'd be fun to play around with my home office. Besides, I already have two complete receiver set ups ( with QS, SQ and CD4 decoders and wired remotes... don't want to go there for the time being.).
Sources will be digital, going through a high-rez DAC. So, I figured a small box would be fun to play with, no need for a delay to start with...