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SaSi
Senior Contributor 200+


Joined: 24 Aug 2008
Posts: 223

PostPosted: Fri Sep 12, 2008 12:14 pm    Post subject: Suggestions Reply with quote

Do you have any T27?

I am planning to do something quite similar myself: Use a set of Kef drivers with a Behringer and amps experimenting with slopes, volumes and configurations.

I like the sound of the B200 and that of the B110 as well. I am not convinced that both are needed together on the same unit. But I am going to try that as well.

What I think is more worth trying is the sound of the T27.

The biggest challenge in your (and my) quest is the bass: How deep it needs to go and how to control it.

It might be interesting to try combining the B200 with 1 or 2 x B139PRs and an enclosure volume of 30 ~ 40lt.

As far as slopes and x-over frequencies, I think getting at them is the fun of this. With the Behringer it's going to be easy to experiment - what you need is some form of evaluation - measurement. Do you have a mic and measurement s/w?
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ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Fri Sep 12, 2008 1:26 pm    Post subject: Reply with quote

I use a Behringer CX3400 in two-way mode with two Quad 405-2 to add bass to smaller KEF designs.

The arrangement uses B139s in Celeste boxes at 200Hz with 0.3mS delay and a Quad 44 with +3dB bass lift to flatten the falling bass response.

Highly recommended for Ref 103-2 and JR149s.
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clem_o
Intermediate Contributor 25+


Joined: 30 May 2005
Posts: 44
Location: Manila, the Philippines

PostPosted: Sun Sep 14, 2008 2:16 am    Post subject: Reply with quote

Hi SaSi,

In fact I have both Laud and Praxis (with the latter on loan from the univsersity). So yes, measurement of the actual response shouldn't be a problem! :-)

I am not sure how much usable bass there will be, the B200s are designed to work into a sealed box and are not particularly large, thus they will probably not produce much volume at LF before they run out of their linear range (xmax). I will confess to not having really tried them out, save for a very short period in which I tried putting them into the R104/2's bass cavity (where they did not work well at all!!)

I plan to put a pair of NHT1259's to handle the ultimate low frequencies, if only to provide "enough" SPL to impress those who get a kick from movie sound-effects!

Cheers
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