I have a pair of Wharfedale Diamond 10.7 speakers and measured the following resistance across the + and - terminals:
2.5 ohms
3.5 ohms
Should I be concerned about this discrepancy?
I have been trying to pin down some stereo imaging issues though my room isn't exactly symmetrical - one speaker is close to a corner. Also, I can confirm the amp's left and right channel voltages match within 1% with a 120Hz sine wave as the source.
2.5 ohms
3.5 ohms
Should I be concerned about this discrepancy?
I have been trying to pin down some stereo imaging issues though my room isn't exactly symmetrical - one speaker is close to a corner. Also, I can confirm the amp's left and right channel voltages match within 1% with a 120Hz sine wave as the source.
~30% difference. Might be poor connection somewhere, or just big tolerance on crossover/driver part values?
Dcr of 3.5 should be more appropriate value. Two woofer units in parallel and some lp inductor dcr could easily sum to 3.5.
Stereophile impedance measurement shows 3.11 ohms at 120 Hz using tracing tool, so if there were a second order lp filter for the woofers, caps would drop the impedance below the terminal dcr.
Are you the original owner of these?
Stereophile impedance measurement shows 3.11 ohms at 120 Hz using tracing tool, so if there were a second order lp filter for the woofers, caps would drop the impedance below the terminal dcr.
Are you the original owner of these?
First check on the imaging issue would be to just swap the speakers over and see if the offset image remains.
Or move them out into the room temporarily and listen (extreme) nearfield.
You could try that on the way of swapping left and right like Mooly suggested.
You could try that on the way of swapping left and right like Mooly suggested.
I’m the original owner. Thanks Mooly for the suggestion - this is an easy test and I can’t tell the difference after switching. Imagining is spot on when I sit closer to the speakers (near field). I’ve concluded there are too many other background noises to troubleshoot: the fridge periodically running in the kitchen on right side, outside noise in the left side with a corner. Also it looks like the crossover network is difficult to access without removing one of the drivers which can be risky. Thanks for all your responses. I followed equilateral triangle arrangement of speakers and myself at each corner.
Room reflections can play havoc with imaging, things like a hard flat wall behind where you sit can seem to suddenly shift the stereo image as you sit back, move forward and it snaps back to centre stage.
That you can not hear a difference after swapping suggests the speakers are going to be OK.
That you can not hear a difference after swapping suggests the speakers are going to be OK.
Place the speakers face to face a few inches apart and invert one speakers polarity. When you play them, in theory they will cancel each other out if they're the same. You will only hear the difference if listening right in between the two. If they're overall similar in response but only at certain frquencies, maybe a parallel cap across the woofer is partially shorted.