Amusing example of why

Posted by Brian H P (A) on June 5, 2015 at 10:00:30

In Reply to: Field lines - the thumb rule posted by airtime on June 5, 2015 at 08:46:27:

Some 25 years ago, a local audio shop had a pair of original B&W 801 Matrix speakers, and Jim the owner was experimenting with passive bi-amping. At one point, he was testing out the woofer section alone and heard this weird "pocka-pocka" sound coming from the unconnected midrange driver. He opened up the crossover and found that the main iron-core coil in the lowpass filter was mounted nose-to-butt with a cored coil in the bandpass filter, and the mutual inductance was sufficient for some of the signal going to the woofer to creep into the midrange circuit. B&W apparently got enough complaints from dealers and techs that they corrected the board layout in subsequent editions.

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Follow Ups Full Thread

Topic - Crossovers - stevenmbell 08:29:22 06/02/15 (25)

RE: Crossovers - bigmoose 17:49:11 06/09/15 (1)

RE: Crossovers - stevenmbell 17:59:16 06/09/15 (0)

RE: Crossovers - A.Wayne 18:04:43 06/05/15 (1)

DA - djk 23:16:11 06/05/15 (0)

Don't forget the inside wiring, ..... - ABliss 11:36:45 06/03/15 (0)

RE: Crossovers - hahax@verizon.net 20:46:32 06/02/15 (7)

RE: Crossovers - airtime 16:28:54 06/04/15 (6)

RE: Crossovers - hahax@verizon.net 19:39:22 06/04/15 (5)

Good Point - briggs 05:15:34 06/05/15 (4)

Field lines - the thumb rule - airtime 08:46:27 06/05/15 (3)

Amusing example of why - Brian H P 10:00:30 06/05/15 (2)

RE: Amusing example of why - hahax@verizon.net 20:38:51 06/05/15 (1)

Interesting - Brian H P 17:44:56 06/09/15 (0)

RE: Crossovers - Caucasian Blackplate 15:51:45 06/02/15 (1)

Then, there are other examples - QuadTodd 13:13:44 06/06/15 (0)

RE: Crossovers - Presto 14:28:57 06/02/15 (5)

RE: Crossovers - airtime 06:20:26 06/04/15 (1)

RE: Crossovers - Presto 09:09:06 06/04/15 (0)

RE: Crossovers - stevenmbell 14:48:00 06/02/15 (2)

RE: Crossovers - Presto 18:39:14 06/02/15 (0)

Amen to the PE 1% caps - Brian H P 15:50:53 06/02/15 (0)

e-mail sent,,,,,,nt - Coner 08:47:33 06/02/15 (0)

RE: Crossovers - airtime 08:37:21 06/02/15 (2)

RE: Crossovers - stevenmbell 16:44:08 06/04/15 (0)

RE: Crossovers - stevenmbell 10:23:36 06/02/15 (0)

Follow Ups

Amusing example of why - Brian H P 10:00:30 06/05/15 (2)

RE: Amusing example of why - hahax@verizon.net 20:38:51 06/05/15 (1)

Interesting - Brian H P 17:44:56 06/09/15 (0)

Amusing example of why

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