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Help with 104/2 bass system

 
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nickl99
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Joined: 25 Mar 2015
Posts: 1
Location: Snodland, Kent

PostPosted: Wed Apr 15, 2015 3:05 am    Post subject: Help with 104/2 bass system Reply with quote

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.
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speakerguru
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Joined: 18 Nov 2005
Posts: 958
Location: Green Hut, Tovil

PostPosted: Wed Apr 15, 2015 8:31 am    Post subject: Re: Help with 104/2 bass system Reply with quote

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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