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B&C DE250/H290 supplement. [message #70368]

Sat, 03 December 2011 07:44

Roland Gama
Messages: 38
Registered: May 2009

Baron

Hello Wayne,
Want your thoughts on this:
I have built a pair of push-pull design sealed 60 litre boxes with the lab12's doing the sub-work. So that is 4 lab 12's in all.
I use this set up with the Bose 901's (long story) through the DEQ2496 and the DCX2496.
I also use REW and find that the 901's inherently can't reproduce the highs after about
17khz.
That is the reason I thought of adding the DE250 horn on top of the 901's. to give it some sparkle.

If you are positive on this then I would be very happy to have any plans for a wood horn
for the DE250.

Awaiting your reply,

Roland.

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Re: B&C DE250/H290 supplement. [message #70369 is a reply to message #70368]

Sat, 03 December 2011 09:09

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

A Bose 901 creates a sound field that is 90% reflected. A horn creates sound that is 90% direct. They are two different approaches and I wouldn't combine them.

In my opinion, directional sound is best for mains and reverberent sound is best for surrounds. So I'd use some horn/waveguide speakers for your mains and repurpose your 901 speakers as surrounds.

But that's answering a question you didn't ask. To answer the one you did:

If I wanted to add some sparkle to 901, I'd probably add dome tweeters on each side.

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Re: B&C DE250/H290 supplement. [message #70387 is a reply to message #70369]

Mon, 05 December 2011 08:11

Roland Gama
Messages: 38
Registered: May 2009

Baron

Hello Wayne
Thanks for the reply.
For the sake enlightenment- What would be the expected outcome if I place the 901's in the opposite direction with a DE250 horn on top?
I lose the most of the reflections I guess? But gain in a better sound stage.
Secondly, I keep the 901's in the recommended position and place the DE250 or any other tweeter facing rear words in the reflecting position. Of course I will need two tweeters per side to match the design/reflections of the 901's. Overkill?
Have I answered my own questions?

Roland.

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