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SpeakerTalk This forum has been set up to facilitate discussion of 1970s KEF speakers and drive units. The owner of the Forum has no connection with KEF Audio.
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nickl99 Introductory Contributor
Joined: 25 Mar 2015 Posts: 1 Location: Snodland, Kent
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Posted: Wed Apr 15, 2015 3:05 am Post subject: Help with 104/2 bass system |
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I've just acquired a pair of 104/2's in rather less than mint condition and wonder if anyone can help with this question.
Are the two B200's both connected in phase or is one out of phase relative to the other. nb do they both travel in the same direction at the same time, and do the crossover components for the two bass drivers create a phase difference between them?
Many thanks if anyone can help. _________________ Nick |
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speakerguru Über Contributor 1000+
Joined: 18 Nov 2005 Posts: 1192 Location: Green Hut, Tovil
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Posted: Wed Apr 15, 2015 8:31 am Post subject: Re: Help with 104/2 bass system |
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nickl99 wrote: | Are the two B200's both connected in phase or is one out of phase relative to the other. | The woofers are acoustically in phase. i.e. they both push and suck air, in and out of the port, at the same instance in time. You would hear nothing if this were not so.
nickl99 wrote: | do they both travel in the same direction at the same time | See above. Given that both units are pointing in the same direction, one cone will be going up and the other down, in order to be both pushing or pulling air through the port.
nickl99 wrote: | do the crossover components for the two bass drivers create a phase difference between them? | No. The woofers are connected electrically in parallel, but out-of phase because they are also mechanically in opposite orientation with respect to the port. They are acoustically in phase. |
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