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Multi-Way Conventional loudspeakers with crossovers

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Old 13th April 2012, 12:50 PM   #1
Hsmeets is offline Hsmeets  Netherlands
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Hi there,

Last few month I've been doing some desk research and other prep work for building a new speaker. After considering all kind of configurations I've come up with a rather convential/classic 3-way system consisting of 1 larger woofer, mid and tweeter. The cabinet has sloping sidewalls to ease of the visual impact and ofcourse the benefit of less pronounced resonance around 1 frequency inside. It will be a bass-reflex system. Driver line-up: Scanspeak 26W/8867T00, 10F/8424G00 and Vifa XT25.

Attachments: Here a sketch of what the speaker will look like (but not 100%) and the first pieces of mdf cut....

Dimensions are around 110cm tall, 40cm deep and 45cm wide at the base.

As soon as some progress is made I'll post some more.
Attached Images
File Type: jpg Accent - Render.jpg (164.3 KB, 756 views)
File Type: jpg cabinet.jpg (519.0 KB, 739 views)

Last edited by Hsmeets; 13th April 2012 at 12:53 PM. Reason: typo's
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Old 13th April 2012, 02:01 PM   #2
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Original and good looking.

Good luck!
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Old 13th April 2012, 02:11 PM   #3
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good choice of drivers , but why the very expensive woofer and the cheaper mid and tweet ?
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Last edited by lduarte1973; 13th April 2012 at 02:14 PM.
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Old 13th April 2012, 02:54 PM   #4
badman is offline badman  United States
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Quote:
Originally Posted by Hsmeets View Post
Hi there,

Last few month I've been doing some desk research and other prep work for building a new speaker. After considering all kind of configurations I've come up with a rather convential/classic 3-way system consisting of 1 larger woofer, mid and tweeter. The cabinet has sloping sidewalls to ease of the visual impact and ofcourse the benefit of less pronounced resonance around 1 frequency inside. It will be a bass-reflex system. Driver line-up: Scanspeak 26W/8867T00, 10F/8424G00 and Vifa XT25.

Attachments: Here a sketch of what the speaker will look like (but not 100%) and the first pieces of mdf cut....

Dimensions are around 110cm tall, 40cm deep and 45cm wide at the base.

As soon as some progress is made I'll post some more.

lookin' cool so far- don't forget to brace the cab, and provide some edge termination (read- roundover or bevel on front baffle edges- bevel would look better in this design)
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Old 13th April 2012, 03:02 PM   #5
Hsmeets is offline Hsmeets  Netherlands
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Originally Posted by lduarte1973 View Post
good choice of drivers , but why the very expensive woofer and the cheaper mid and tweet ?
I personally do not hear that much difference in tweeters that would warrant a more costly tweeter. That is also because of some hearing troubles that limit me here. The XT25 is more than adequate. I heard a few commercial designs that use a XT25 or derivate and they sounded good to me. There is also the reason that I wanted a tweeter with a small face plate so I can place it very close to the mid. Other options would have been SB Acoustics and Wavecor (and some more expensive Scan-Speak models).

I long leap-frogged between the more expensive revelator mid and this mid from the discovery range. Curiosity yielded me to try the 10F.

The 10F is a small speaker, so combined with a small tweeter it will (hopefully) expose some more point-source caracteristics.

The baffle will be bolted on (hence the cloth grille) if I decide the replace the 10F for something else it will be not too difficult and only require a new baffle.

Regarding the woofer I looked for something that could hit a f3 of 30hz in a 55 to 60ltr BR cabinet and have other favorable aspects like relative low cone mass.
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Old 13th April 2012, 03:06 PM   #6
Hsmeets is offline Hsmeets  Netherlands
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Originally Posted by badman View Post
lookin' cool so far- don't forget to brace the cab, and provide some edge termination (read- roundover or bevel on front baffle edges- bevel would look better in this design)
No worries, it will be braced

I used 'the edge' (and J. Bagby's spreadsheet) to simulate edge diffraction. I found that even with sharp edges I could limit the ripple within +- 1db by having the mid and tweet positioned towards the sides and somewhat lower on the baffle (I'll have to tilt the speaker a few degrees backwards to compensate for the little bit lower position on the baffle).

Last edited by Hsmeets; 13th April 2012 at 03:08 PM.
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Old 13th April 2012, 03:11 PM   #7
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The Seas MCA12RC is also a great mid range and will allow you to cover the critical 300 - 5k with one driver as the 10F

H1304-08 - Seas MCA12RC midrange - Europe Audio

used on troels gravesen 3 way classic

3-Way Classic
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Old 13th April 2012, 05:31 PM   #8
Hsmeets is offline Hsmeets  Netherlands
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Originally Posted by lduarte1973 View Post
The Seas MCA12RC is also a great mid range and will allow you to cover the critical 300 - 5k with one driver as the 10F

H1304-08 - Seas MCA12RC midrange - Europe Audio

used on troels gravesen 3 way classic

3-Way Classic
There are many good drivers out there but at some point you just have choose to move forward
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Old 18th April 2012, 09:26 PM   #9
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in this thread you may find some useful info on the 10F

ScanSpeak 10F
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Old 18th April 2012, 09:40 PM   #10
Hsmeets is offline Hsmeets  Netherlands
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Originally Posted by lduarte1973 View Post
in this thread you may find some useful info on the 10F

ScanSpeak 10F
Have seen the thread, but thanks anyway!

Here some more details of the construction (see attachment).

Huib
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File Type: jpg constructieII.jpg (268.8 KB, 633 views)
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