diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Multi-Way (http://www.diyaudio.com/forums/multi-way/)
-   -   Loudspeaker Build Thread (http://www.diyaudio.com/forums/multi-way/210687-loudspeaker-build-thread.html)

Hsmeets 13th April 2012 12:50 PM

Loudspeaker Build Thread
 
2 Attachment(s)
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.

Osvaldo de Banfield 13th April 2012 02:01 PM

Original and good looking.

Good luck!

lduarte1973 13th April 2012 02:11 PM

good choice of drivers , but why the very expensive woofer and the cheaper mid and tweet ?

badman 13th April 2012 02:54 PM

Quote:

Originally Posted by Hsmeets (Post 2983706)
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)

Hsmeets 13th April 2012 03:02 PM

Quote:

Originally Posted by lduarte1973 (Post 2983805)
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.

Hsmeets 13th April 2012 03:06 PM

Quote:

Originally Posted by badman (Post 2983848)
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).

lduarte1973 13th April 2012 03:11 PM

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

Hsmeets 13th April 2012 05:31 PM

Quote:

Originally Posted by lduarte1973 (Post 2983872)
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 :)

lduarte1973 18th April 2012 09:26 PM

in this thread you may find some useful info on the 10F

http://www.diyaudio.com/forums/full-...speak-10f.html

Hsmeets 18th April 2012 09:40 PM

1 Attachment(s)
Quote:

Originally Posted by lduarte1973 (Post 2991037)
in this thread you may find some useful info on the 10F

http://www.diyaudio.com/forums/full-...speak-10f.html

Have seen the thread, but thanks anyway! :)

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

Huib


All times are GMT. The time now is 02:42 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2