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Cheap and cheerful surround sound?
Cheap and cheerful surround sound?
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Old 1st June 2018, 11:53 PM   #11
goodguys is offline goodguys  United Kingdom
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In the article it states that hafler surround sound is only possible if the amplifier has the left and right negative speaker terminals tied together, a common ground. Is there some way to make this hafler sound work with amplifiers which do not have this common ground.
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Old 2nd June 2018, 11:55 AM   #12
anti is offline anti  Slovakia
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With BTL amps you can use the '+' ('hot') side of both amp's outputs for the "surround" hook-up if that's what you mean.

If you have other configurations in mind, then I guess you'll have to get "creative" ...
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Old 2nd June 2018, 04:10 PM   #13
Zero D is offline Zero D  United Kingdom
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@ goodguys

That Hafler surround, is very simply achieved like this The Negs of both speakers are NOT connected to common/ground at the Amp, or Anywhere !
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Old 3rd June 2018, 06:43 AM   #14
goodguys is offline goodguys  United Kingdom
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By Get Creative do you mean a processor? Is it not possible?
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Old 3rd June 2018, 11:40 AM   #15
anti is offline anti  Slovakia
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Wiring. I meant wiring.
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Old 4th June 2018, 04:20 AM   #16
goodguys is offline goodguys  United Kingdom
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I have done the hafler thing to my quad amp, which i know the left and right negative speaker terminals are tied together, and it works, with my pioneer and denon amp it is not working.
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Old 4th June 2018, 04:28 AM   #17
Ian Finch is offline Ian Finch  Australia
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Why not post the model numbers of these amplifiers so that the reason they don't work in the Hafler configuration can be deduced sensibly from schematics, if they are available on the net?
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Old 5th June 2018, 02:57 AM   #18
CBS240 is offline CBS240  United States
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The "difference" signal does not typically contain lower frequency where the majority of power is, or a full magnitude signal so it isn't loading the amplifier as would a direct parallel connection.
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Old 5th June 2018, 03:21 AM   #19
multisync is offline multisync  Canada
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Dynaco had a version as well
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Old 16th June 2018, 05:14 AM   #20
goodguys is offline goodguys  United Kingdom
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I have the quad 405 amp, and the two negative speaker terminals are tied together.
I am wanting to upgrade to the 606 or 909, do you know if either of these amps have the negative speaker terminals tied together.


Thanks.
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