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Old 16th November 2004, 04:51 AM   #1
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Default Different kind of sub

Hi all,

I'm a newcomer to the DIY world. I've been doing a lot of research and have experence with decent audio systems, as well as a very good backing in math, science, and woodworking. I live in a dorm room at the moment, and I'm looking for a good subwoofer. I'm not looking for huge volumes, or a flat response to 20 hz, but in the mid 30's is where I'm aiming.

But even more than that, I'm looking for something small and responsive. I live in a very compact room, and don't have the space or money to do anything huge.

I got the t/s data on a supposed subwoofer which caught my interest. It's a 5" driver with a $25 price tag, which in simulations seems to fit my needs almost perfectly.

Net volume = 0.45 ft^3, f3l around 34 hz, output up to around 100 dbs in simulations when mated to a 70 watt amp (I'm familiar with baffle step, so wall placement would be a given in the setup, most likely corner loaded).

Any thoughts? I'm using a default ported design. The sub is intented for 99% music. Model number/specs included below. Anyone have any experience with drivers like these?

Comments/suggestions more than welcome. Thanks in advance!

Reece



Tang Band W5-1138SA

4 ohm

sensitivity: 82 db
resonance: 45 hz
max power: 110 w
xmax: 9.25 mm
vas: 6.71 L
qts: .49
qms: 2.68
qes: .61
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Old 16th November 2004, 06:25 AM   #2
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I can't even begin to imagine a 5" sub.
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Old 16th November 2004, 08:28 AM   #3
jdybnis is offline jdybnis  United States
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The Adire Exreamis 6" seems like the obvious choice.
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Old 16th November 2004, 11:58 AM   #4
Volenti is offline Volenti  Australia
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I get very similar results modeling that driver, vent gets a bit long though, 14''.

It's cheap, worth a shot
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Old 16th November 2004, 12:12 PM   #5
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With that cone size you're going to be very limited in output; OK for a computer station, but it won't fill a room. Go with an eight, the TB 740 or MCM 55-2421, the box will still be quite small and output adequate.
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Old 16th November 2004, 03:18 PM   #6
jjdche is offline jjdche  United States
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Whats your budget and size limitation? Thats really the key here.
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Old 16th November 2004, 05:13 PM   #7
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So I shouldn't rely on the output predictions, because on paper is seems like it could go more than loud enough for what I need...
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Old 16th November 2004, 09:42 PM   #8
Ron E is offline Ron E  United States
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Quote:
Originally posted by rjon17469
So I shouldn't rely on the output predictions, because on paper is seems like it could go more than loud enough for what I need...
It depends on what generated the output prediction. Be aware that output predictions from all but thw most expensive software assume linear behavior. Loudspeakers are not linear. This means that compression sets in, and it is often ~6dB anywhere near rated power due to VC heating alone. Add to that suspension nonlinearities and things can be much different than a simple simulation.

That said, try it, it would make a nice experiment.
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