Suggestions: Stereo Mid-Bass/Sub enclosure 'stands' for Bookshelf speakers - diyAudio
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Old 10th March 2010, 01:12 AM   #1
Kilroy is offline Kilroy  United States
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Default Suggestions: Stereo Mid-Bass/Sub enclosure 'stands' for Bookshelf speakers

Hi I have a set of old as dirt B&W DM100i bookshelf speakers that I love and think still sound great. But in my current room they're a little light in the lower regions.

My original plan was to build a set of full-range floor standing mains and move the B&W's to the rear of my Surround system.

But the wife thinks they're too chunky to hang off the wall and stands at the back of the room are out as long as I have a toddler that likes to pull everything down.

So I was thinking about building a set of mid-bass/sub enclosures to compliment the B&Ws and act as 'stands' sort of completing an aray...

Something like Nelson Pass' Sr1s...
http://www.passlabs.com/pass/175/speakers

The downside is that while I love the B&Ws and they've been with me like an old set of jeans, they are rather ugly and dated looking.
http://assets.bowers-wilkins.com/med/Libraries/3/DM100i_Archive_l2_w0_h0.pdf

So it might be tough to come up with a box that actually 'compliments' them physically.

Thoughts? Suggestions?

Thanks,
Phil
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Old 10th March 2010, 03:29 AM   #2
bastek is offline bastek  United States
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I'm interested in this as well as i have a pair of 5.25" mid-woofer monitors that i like to use in a full range system. I know the c/o has to be modified to cross at about 250-350 Hz to the bass module. I don't think a lower mid-upper bass driver is necessary as most 10-12" woofers can go there. I owned the tower version of that B&W in the late 80s. Nice speakers.
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Old 10th March 2010, 03:55 AM   #3
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This is what my most recent build in this vein looks like ...

Click the image to open in full size.

Under my DM302s i had a double Peerless 8" woofer.

Both were bi-amped,

dave
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Old 11th March 2010, 12:57 AM   #4
Kilroy is offline Kilroy  United States
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Quote:
Originally Posted by bastek View Post
I'm interested in this as well as i have a pair of 5.25" mid-woofer monitors that i like to use in a full range system. I know the c/o has to be modified to cross at about 250-350 Hz to the bass module. I don't think a lower mid-upper bass driver is necessary as most 10-12" woofers can go there. I owned the tower version of that B&W in the late 80s. Nice speakers.
The Mid-Bass suggestion was just based on Pass' design...
I'm not sure how much overlap you would want. My initial idea was 2 8" subs in each tower.
But maybe an 8" woofer and a 12" sub could work too... Maybe with the 8 facing forward and the 12 on the side? I don't know...

Maybe instead of using a series parallel setup and 4 drivers to keep 8Ohms, I could just use a single bass speaker... Maybe a 10" in the right enclosure.

I'm really open to anything at this point. Well... Anything with a reasonable WAF, anyway...
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Old 11th March 2010, 01:04 AM   #5
Kilroy is offline Kilroy  United States
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Quote:
Originally Posted by planet10 View Post
This is what my most recent build in this vein looks like ...

Click the image to open in full size.

Under my DM302s i had a double Peerless 8" woofer.

Both were bi-amped,

dave
Thanks for replying Dave!
I've been pouring through your site for a couple weeks now getting ideas.

The enclosures look great! What's the structure like? Assuming TL?
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Old 11th March 2010, 04:42 AM   #6
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They started out as a TL... the SDX7 didn't like that, so they are aperiodic at the moment. I have some other drivers to try.

dave
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Old 11th March 2010, 05:05 AM   #7
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Default Easy build

Just make a sealed sub using a good qualitz 10" driver in the form of a small tower and plop the bookshelf speaker on top!

-Charlie
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