Please help to choose a small 3" woofer - diyAudio
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Old 5th February 2014, 10:15 AM   #1
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Default Please help to choose a small 3" woofer

Hi

I currently have a SONOS Play 5 on top of my fridge, to serve our kitchen.

I am usually underwhelmed by the Play 5, and have been wandering how to do better with DIY.

I have a pair of Jordan JXR6HD, which I bought to build a slim FAST floorstander. I am unlikely to build this now, as I have moved out of the office that they were intended for.

The FAST idea still appeals, and I recently came across this digital 2.1 amp, from hifimediy that could make the whole concept work easily: Hifimediy DDX320v2.2 2.1 Digital Amplifier

What I had in mind was a bit like a soundbar, but considerably deeper. It does need to be discreet from the front, so a maximum of about 10-15cm high. It could be up to 80 cm wide, and up to 80 cm deep.

My idea was to put the fullrange Jordan units at either end of the front baffle, and fill the middle with 3" woofers (or fullrangers performing as woofers).

F WWWW F

My proposed design would be able to accomodate 4x, or 6x 3" woofers.

The woofers would be crossed over at around 200Hz, and would be mono. The Jordan units would be high passed at the same frequency, by the digital amp.

I would use a SONOS Connect as a digital source.

Does this sound like a good idea? Any pitfalls that I have not considered?

The main reason for this post is to choose a 3" driver for the low frequencies.

Candidates so far:

Aurasound NS3-193-8A: The Madisound Speaker Store

Tang Band W3-1876S: Tang Band W3-1876S 3" Mini Subwoofer | 264-909

Dayton Audio ND91: Dayton Audio ND91-8 3-1/2" Aluminum Cone Full-Range Driver 8 | 290-226

Any other possibilities? Happy to keep cost low.

I had thought that I could use Passive radiators (one per LF driver) located on the rear: The Madisound Speaker Store
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Old 5th February 2014, 10:46 AM   #2
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Seems like a nice project. I'd go for the Tang Band because it would seem to be able to hit lower.
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Old 5th February 2014, 11:33 AM   #3
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How about these ones:http://www.mivoc.com/downloads/de/mi...nblatt_WEB.pdf

€19 each incl. VAT. Four in parallel would give you 4Ohm.

Last edited by Charles Darwin; 5th February 2014 at 11:41 AM.
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Old 5th February 2014, 11:40 AM   #4
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I had some of these Mivoc's and returned them immediatly. Build quality was horrible. Surround was glued on oval, etc. etc. But that was quite a while ago when they where first introduced... This may have improved. Don't know if the Dayton lookalike is affordable in EU.
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Old 5th February 2014, 01:26 PM   #5
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Never used any of their drivers but they seem to be fairly popular in the german audio press (Klang+Ton etc).
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Old 5th February 2014, 01:26 PM   #6
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Fountek FR88 or FR89 by a long shot.
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Old 5th February 2014, 03:16 PM   #7
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Other than visual design constraints, why multiple 3-4" woofers? They exhibit more distortion at the low end and cost far more to equal what even a single 6.5" can do.
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Old 5th February 2014, 03:28 PM   #8
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If you want to keep the height down, are there not some elliptical units you could consider?
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Old 5th February 2014, 03:35 PM   #9
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Yep. It is for visual design constraints.

This is unlikley to be a high output device.

Thanks for your suggestions.

So far, I am leaning towards the Aurasounds. The Tangband's go lower, but the Aurasounds would have better alternative uses, if this project sounds $%".

Tangband frequency response: http://www.tb-speaker.com/detail/1230_04/w3-1876s.htm

Aurasound frequency response: The Madisound Speaker Store
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Old 5th February 2014, 03:36 PM   #10
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Quote:
If you want to keep the height down, are there not some elliptical units you could consider?
Good idea. Any suggestions?
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