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General speaker questions for audio and home theater.

strange ohm readings on my mid-bass-driver

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A few weeks back I started comparing different tubes in my amp. To make my comparisson a little easier, I replace the tubes of one channel only and than listen for the difference in the left and right channel, using a mono recording on one of the XLO test cds.

As it turned out, the right channel always sounded a little thinner than the left channel.

So I swapped the speaker cable from left to right to see if this was coming from the CD player or the amp. As it turned out, the right channel continued having the thinner sound.

Than I disconnected my speakers and hooked my Radio Shack digital Voltmeter to the speaker to get a ohm/resistance reading. Guess that due to the cross over my meter was not able to read any resistance = not 0, but unable to read.

So I unscrewed the mid bass drivers on my Sapphire III and meassure the lead on the drivers direct, thinking than maybe one of the voicecoils on my Sapphire III midbass driver has gone bad.

Reading of the lead where:
Right speaker:
Coil #1: 3.8 ohms
Coil #2: 5.1 ohms

Left Speaker:
Coil #1: 3.2 ohms
Coil #2: 2.9 ohms

I did not disconnect the crossover from the driver, since the leads are solderd to the driver.

What could cause this difference in reading?

Guess this difference explains why my right speaker sounds thinner than the left speaker.

I bought my Sappire II in '91 and upgraded them last year to the Sapphire III status. I also placed the High pass cross over part from my sub one in front of the mid driver cross over.

I also checked the lay out and hook up several times of the new Sapphire III crossover while assembling and after assembling of the new cross over.

Any idea what is "wrong" with my Sapphire III ?

Any other suggetsins on trying to trace down the problem?

Thanks



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Topic - strange ohm readings on my mid-bass-driver - Capt. Z 12:06:11 04/25/01 (6)


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