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RE: How do I test my IIIA to make sure they are OK?

Posted by neolith (A) on December 14, 2014 at 17:08:20

In Reply to: How do I test my IIIA to make sure they are OK? posted by atkin11j@yahoo.com on December 14, 2014 at 15:37:30:

First a somewhat stupid question but I got to ask - have you been running the IIIa's full range with the sub attached at the speaker outs of the amp or were you using the preamp with a high pass filter to the amp and forgot to reset the speakers to full range? I ask because I have been there and done that.
The easiest way to check the woofers is to disconnect the external crossover and measure the resistance across the woofer terminals - it should be 4 ohms.
If woofers don't have the same polarity, the bass could suffer. Reverse the connections to the woofer on one speaker only and see if things improve. Also if the polarity on just one woofer is reversed you should notice a blurred image (especially on content lower than 250 hz). And finally, there will probably be a drop in the volume around the crossover frequency (~340 Hz) which will be noticeable with pure tones played on just the "wrong" woofer.

"Our head is round in order to allow our thoughts to change direction." Francis Picabia

Edits: 12/14/14

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