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Hybrid audio bi-amps

C

Charles Schuler

Jan 1, 1970
0
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.
 
B

Bob Masta

Jan 1, 1970
0
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

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