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Small sub enclosure for bookshelf FAST /WAW implementation
Small sub enclosure for bookshelf FAST /WAW implementation
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Old 6th March 2017, 09:20 PM   #1
Axel83 is offline Axel83
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Default Small sub enclosure for bookshelf FAST /WAW implementation

Hi guys,
I just need some advice to use a couple of minisubs as helper in a FAST configuration for a bookshelf system.
I tried to model a small Tang Band like the W6-1139SIF; I tried both ported (BR) and closed boxes (maybe a PR is better?).

These subs are just the bottom boxes of an active FAST enclosure with a fullrange for the upper octaves.
I will amp these with the hypex AS2.100D so I can cross them as I like and even apply room correction filters (equalizing maybe).

Here are my models done with Hornresponse but Im a noob designing speakers so any advice is kindly welcome.

The first is a 11liters BR;
the second is a smaller 9liters BR but I find it too small maybe;
the last one is a 5liters closed box, but it need to be equalized.

Just keep in mind that small enclosure is a must.

Regards,
Andrea
Attached Images
File Type: jpg TB W6-1139SIF ported11l.jpg (137.6 KB, 229 views)
File Type: jpg W6-1139SIF ported9l.jpg (139.2 KB, 221 views)
File Type: jpg W6-1139SIF closed5l.jpg (135.3 KB, 218 views)
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Old 7th March 2017, 12:14 PM   #2
plund is offline plund  United States
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Axel,
If you are not set on creating your own design you might consider a very small design by Paul Carmody...do a search for "Voxel". It uses the TB W5 1138. I have built a similar small sub based on the Voxel and it does fill in the bottom nicely...down to 30 Hz. Used the W5-1138 and a 25 Watt plate amp. The small size of the Voxel would meet your size criteria...If it has enough ooompfff would depend on how large your room is.

Pete

Last edited by plund; 7th March 2017 at 12:34 PM. Reason: Added info
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Old 7th March 2017, 02:15 PM   #3
chris661 is offline chris661  United Kingdom
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IMO, the Tang Band mini-subs need an absolute rocket up them to really get a boogie on.

When you've done that, though, the amount of low end you get out of a small driver is amazing.

Chris
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Old 8th March 2017, 08:22 AM   #4
Axel83 is offline Axel83
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Hi guys,

I'm trying to build a bookshelf like enclosure, with the lower half acting as a subwoofer for helping a fullrange (sitting in the upper half).
Every driver will get its closed (or ported) volume.

I'm just trying to understand if my simulation are good or flawed in some ways.

Thanks for the "Voxel" sub suggestion, I will dig into it.
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Old 9th March 2017, 08:40 AM   #5
chris661 is offline chris661  United Kingdom
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Both sims look okay, pretty standard for what you're simulating.
The mess above 400Hz or so won't be nearly as bad with the built speakers.

A couple of things to consider:
- when power is applied, small ports tend to chuff, leading to output compression. You want airspeed in the vent to be well below 30m/s, preferably below 20m/s at peak power.
- Sealed boxes will require some EQ to sound their best, which eats headroom in the amplifiers. On Hornresp, select maximum SPL with 100w and 10mm of Xmax, and see how loud the sealed system will go. You'll find the response slopes down, so you can choose your compromise between volume and LF extension.

I'd recommend investing in a measurement mic and soundcard. You can get them fairly cheap, and they'll go a long way to helping you optimise your setup.

Chris
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Old 10th March 2017, 05:50 AM   #6
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by chris661 View Post
The mess above 400Hz or so won't be nearly as bad with the built speakers.
It will mostly disappear from the simulation results if the 'Resonances Masked' option is used instead.
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File Type: png Attach_1.png (62.2 KB, 125 views)
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