Coastsider
Curmudgeon
Several weeks after the successful repair of my RS 2.5 ECU and everything working and sounding fine as documented in the thread at the link below:
http://www.audiokarma.org/forums/showthread.php?t=630055&page=2
I suddenly noticed a strange anomaly with my right speaker wherein the sound coming from it was distinctly muffled when compared to the left speaker. I first swapped left and right channel cables on the ECU followed by the same procedure on both amplifiers driving the mid/tweeters and woofers and the problem persisted in the right speaker. I even swapped out the ECU with the spare that I had acquired while waiting for the parts to repair my original with no apparent change in the condition. If I remove the ECU from the signal stream, flip the Single Amp/Bi-Amp switch to Single Amp as per Infinity's instructions and passively bi-amp the speakers, the right speaker sounds fine. After checking the impedance of both EMIT's and EMIM's with them out of the circuit and discovering that they all check out as expected, the obvious conclusion is that there is something wrong in the passive crossover that only comes into play with the switch in the bi-amp position.
I am attaching a copy of the crossover schematic from the Infinity Classics website, the only one I know to be available, with the caveat that the crossovers in my 2.5's have significantly fewer components than are shown, likely an earlier iteration that predates the schematic. Without going into what components are not present in my crossovers when compared to the schematic which at this point would just muddy the discussion, can one of the RS 2.5 crossover gurus out there explain to me what changes when the switch is placed in the bi-amp position when compared to the single amp position, and in particular with regards to the attached schematic:
Is the switch shown in the biamp or single amp position?
Relative to the yellow highlighted dotted line - what does it indicate?
Does the dotted line that goes to the points adjacent to the 2.5/5mH choke indicate a third pole on the switch? Otherwise I don't see a circuit to the positive side of VC1 on the woofer.
I have a spare upper panel with the crossover intact that essentially matches the one's in my RS 2.5's and have been trying to match it to the schematic but because of the missing components, to include a double pole switch in my crossovers as well as the spare, in place of what appears to be a three pole switch on the schematic, I am just getting more and more confused. I will attach a photo of the passive crossover in my right 2.5 just for informational purposes.
So I basically need to know how the switch works - what it pulls in or removes from the passive components when it is in the bi-amp position.
Thanks for whatever help anyone can provide.
http://www.audiokarma.org/forums/showthread.php?t=630055&page=2
I suddenly noticed a strange anomaly with my right speaker wherein the sound coming from it was distinctly muffled when compared to the left speaker. I first swapped left and right channel cables on the ECU followed by the same procedure on both amplifiers driving the mid/tweeters and woofers and the problem persisted in the right speaker. I even swapped out the ECU with the spare that I had acquired while waiting for the parts to repair my original with no apparent change in the condition. If I remove the ECU from the signal stream, flip the Single Amp/Bi-Amp switch to Single Amp as per Infinity's instructions and passively bi-amp the speakers, the right speaker sounds fine. After checking the impedance of both EMIT's and EMIM's with them out of the circuit and discovering that they all check out as expected, the obvious conclusion is that there is something wrong in the passive crossover that only comes into play with the switch in the bi-amp position.
I am attaching a copy of the crossover schematic from the Infinity Classics website, the only one I know to be available, with the caveat that the crossovers in my 2.5's have significantly fewer components than are shown, likely an earlier iteration that predates the schematic. Without going into what components are not present in my crossovers when compared to the schematic which at this point would just muddy the discussion, can one of the RS 2.5 crossover gurus out there explain to me what changes when the switch is placed in the bi-amp position when compared to the single amp position, and in particular with regards to the attached schematic:
Is the switch shown in the biamp or single amp position?
Relative to the yellow highlighted dotted line - what does it indicate?
Does the dotted line that goes to the points adjacent to the 2.5/5mH choke indicate a third pole on the switch? Otherwise I don't see a circuit to the positive side of VC1 on the woofer.
I have a spare upper panel with the crossover intact that essentially matches the one's in my RS 2.5's and have been trying to match it to the schematic but because of the missing components, to include a double pole switch in my crossovers as well as the spare, in place of what appears to be a three pole switch on the schematic, I am just getting more and more confused. I will attach a photo of the passive crossover in my right 2.5 just for informational purposes.
So I basically need to know how the switch works - what it pulls in or removes from the passive components when it is in the bi-amp position.
Thanks for whatever help anyone can provide.
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