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Old 24th November 2012, 05:35 AM   #1
Mike BB is offline Mike BB  United States
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Default What type should I build?...newbie here...

Hello!

First post...I found diyaudio by stumbling across the Wild Burro Audio labs site which turned me onto building myself a pair of open baffle speakers...or something else...?

The room where the speakers will live is relatively small (12x18').

The speakers will be powered by a miniwatt N3.

So...what type of speakers should I build? It's my understanding that the design on the Wild Burro site requires more space between the wall and the speaker? Would it make more sense for me to go with a closed speaker design? I'm in a small apartment now and I'm buying a house soon but I can't imagine I'd ever have much space for a pair of speakers that need to be placed in the middle of the room.

So what I'd like help with is what kind of drivers I should buy and what kind of speakers I should build. It would be cool to use the Wild Burro speakers since he seems like a nice guy and they're made in the USA...which I think are both important.

I should also mention that I am a cabinet maker and I own a wood shop. All I need is someone to tell me what to do, I can build pretty much anything. Plans would help though...

Thank you all in advance for the help and please let me know if you need any more details.

BB
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Old 24th November 2012, 06:06 AM   #2
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Life is full of difficult decisions....the answers are DIY

Larry
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Old 24th November 2012, 07:47 AM   #3
zman01 is offline zman01  Bangladesh
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Mike BB,

Wecome!

No experience with the Wild Burro Audio drivers or open baffles, but read that they need some space from the back walls.

My first full-range DIY build was the BiB (Bigger is Better) design, which is pretty large in size (65" tall) but resonable footprint (11" x 16" IIRC). The build was for a friend and the drivers I used were Fostex FEE166EN. The BiB cabinet is pretty simple to build and they played very nicely with the Mini-watt N3. If placed 8-9' apart the should be reasonably close to corners in your room and have nice imaging.

Just looked up the Wild Burro Audio site - they state that the Betsy-K is suitable for BiBs too.

Good luck on your DIY journey!

Last edited by zman01; 24th November 2012 at 07:53 AM.
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Old 24th November 2012, 03:46 PM   #4
Mike BB is offline Mike BB  United States
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Thanks for the response Zman...

Are there any specific plans to build some BiB speakers that I could look at? I can find pictures of a lot of nice looking finished speakers but as to whats going on inside or what they're specific dimensions are, I have no idea. When I think I finally find a website with some info on it, the link is usually broken. Do I just build a giant box and put a driver in it? That's it?!

BB
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Old 24th November 2012, 05:16 PM   #5
zman01 is offline zman01  Bangladesh
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Mike BB,

The BiB definitely has plans - actually GM (Greg Monfort) made a calculator for the DIY community. You have to plug in the parameters to get the correct dimensions for the box. You can find more on this thread:

http://www.diyaudio.com/forums/full-...e206e-bib.html
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Old 25th November 2012, 05:17 AM   #6
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Either there's an error when trying to use the linked spreadsheet in Open Office, or Betsy-K models to be one BIG BIB - 21" wide, 30" deep and 68" tall. Maybe a bit much for a small room?

I'd build an MLTL instead. Should work well in a room the size of yours. Easier to move later on, too.

WBAL Betsy-K 'small' ~40 Hz MLTL

BetsyK ML-TL and TQWT

Bill
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Old 25th November 2012, 06:50 PM   #7
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by lousymusician View Post
Either there's an error when trying to use the linked spreadsheet in Open Office, or Betsy-K models to be one BIG BIB - 21" wide, 30" deep and 68" tall. Maybe a bit much for a small room?

I'd build an MLTL instead. Should work well in a room the size of yours. Easier to move later on, too.

WBAL Betsy-K 'small' ~40 Hz MLTL

BetsyK ML-TL and TQWT

Bill

Bill, maybe no error at all - sometimes a driver's T/S parameters simply call for large enclosures to deliver the maximum extension of frequency response and SPLs - as much as many of us would like to ignore them, sooner or later those danged laws of physics impact on our goals
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Old 25th November 2012, 08:09 PM   #8
Nanook is offline Nanook  Canada
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Default That depends on what you want.

Typical questions:
  • What type of music?
  • What kind of impedance load?
  • What budget?
  • Realistically, how deep of bass response?
  • Do you want a floor stander, bookshelf, OBs type?
  • Will you consider using a subwoofer (or subwoofers)?

12' X 18' isn't that small.

If the budget is low, or wanting to experience DIY speaker building in the most minimal way, I would suggest the Pioneer fullranger or its "equivalent" sold by Parts Express. Last time I checked they were $13 each or so. I see they now sell some of the Visaton drivers. The Visaton 3020 BG20 8" looks like it could suit pretty nicely. Of course there are so many choices. I do like the idea of fullrange single driver loudspeakers (if using subs then usually an active one or pair is is used) as no power-robbing passive crossover is required.

As your room is very similar in dimensions to mine I can tell you that typical OBs are out of the question, unless their is no SOAF requirement. The "Betsy" OB project on Wild Burro Audio's could be made to produce significantly more bass if the wings are always swept back and a top is made to keep the rear wave from folding around the baffle.

For more conventional speakers look at the planet10-hifi's plan library (chrisb is part of the planet10-hifi group). None of the planet10-hifi group make suggestions regarding their own products unless directly asked, as the appearance of self-promotion and pandering is not one they (chrisb, planet10 or Daniel) want to advance, in the "open forums, but thay answer questions in their own subforum within "Vendor's Bizarre". Their custom versions of fullrangers are much better than the price suggests, but they are not necessarily cheap (you'll have to check the website for current pricing, but I am very satisfied with a pair of the prime sized cabinets equipped with a pair of their CH70eN (gen1) drivers. Stands would be necessary. At some latter date, as space or funds or both become available then build some bass modules. The speakers would then become (in their nomenclature) a FAST system (Full range And Subwoofer ? Don't ask me what the acronym stands for).

There are numerous multi-way projects all over the internet. Good ones can be found here at diyaudio, just check the multi-way sub-forum. Bass reflex, Sealed cabinets, etc. If choosing one of these, check to see if members have built any, and take into account how expensive the crossover parts are. Good crossover parts can be very expensive (and hence my suggestion of a FR single driver based project). Look at Humble Homemade Hifi for one. Also look at Troels Graveson's page. There are just too many to list. The links are only examples. There are just so many choices and so many budgets. I think there must be links to most of these at the top of the multi-way loudspeaker forum page, and the fullrange loudspeaker forum page.
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Old 25th November 2012, 08:34 PM   #9
sreten is offline sreten  United Kingdom
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Hi,

With allegedly 3.5W available per channel what you want is a high efficiency.

Something like :
http://www.humblehomemadehifi.com/do...o-206_copy.pdf

A higher power active subwoofer is never going hurt.

rgds, sreten.
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Old 25th November 2012, 09:57 PM   #10
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Quote:
Originally Posted by sreten View Post
With allegedly 3.5W available per channel what you want is a high efficiency
In a modestly sized room like that, and with at least a wall near the mouth, and with all but very high levels, many find the Frugel-Horn Mk3 with FE126 as a goodmatch -- i always use the opportunity to use the 3.9 watt RH84s in the system when i listen to our FH3/126. High WAF in most cases too.

Quote:
A higher power active subwoofer is never going hurt.
Or 2 smaller ones, usually does not hurt with any system.

dave
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