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Posted by Charles Schuler on November 29, 2006, 4:40 pm
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I have a Pansonic stereo system with separate high and low speaker
terminals. There is only one stereo power amp ... thus it is not a true
bi-phase arrangement. I can't find the answer to how the hybrids work, so I
am posting my guess here.
Here is what I think is going on. The right channel is phase inverted when
compared to the left. Thus, for a mono signal, the signal voltage across
the R-L connection is twice that from R to gnd or L to gnd. The clue is
that the low speakers are series connected across the R-L hot terminals and
so are the surround speakers.
Anybody know for sure? Thanks.
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Posted by Bob Masta on November 30, 2006, 8:48 am
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On Wed, 29 Nov 2006 16:40:22 -0500, "Charles Schuler"
>I have a Pansonic stereo system with separate high and low speaker
>terminals. There is only one stereo power amp ... thus it is not a true
>bi-phase arrangement. I can't find the answer to how the hybrids work, so I
>am posting my guess here.
>
>Here is what I think is going on. The right channel is phase inverted when
>compared to the left. Thus, for a mono signal, the signal voltage across
>the R-L connection is twice that from R to gnd or L to gnd. The clue is
>that the low speakers are series connected across the R-L hot terminals and
>so are the surround speakers.
>
>Anybody know for sure? Thanks.
>
>
I don't know about "hybrid" or Panasonic, but the
arrangement you describe is called "bridge" mode.
Since it effectively doubles the voltage swing across
the load, the output power is quadrupled (assuming
the amp can supply the current.)
Best regards,
Bob Masta
dqatechATdaqartaDOTcom
D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
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>terminals. There is only one stereo power amp ... thus it is not a true
>bi-phase arrangement. I can't find the answer to how the hybrids work, so I
>am posting my guess here.
>
>Here is what I think is going on. The right channel is phase inverted when
>compared to the left. Thus, for a mono signal, the signal voltage across
>the R-L connection is twice that from R to gnd or L to gnd. The clue is
>that the low speakers are series connected across the R-L hot terminals and
>so are the surround speakers.
>
>Anybody know for sure? Thanks.
>
>