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Old 24th January 2006, 07:35 PM   #1
croat47 is offline croat47  United States
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Default What would you build?

I recieved two free subwoofer drivers from a friend. Through a lot of searching, I got the manufacturer and they sent me these specs...

Fs= 16 Hz
VAS= 8.1 ft^3
Qts= 0.208
Qes= 0.217
Sd= 51.1 in^2
xmax= 0.23 in
Znom= 4 ohm
DCres= 3.6 ohm
PMax= 200W RMS


I have one suggestion of a sealed 1-2 ft^3 cabinet with a 120W plate amp.

What would you build with this for music and minimal HT?
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Old 24th January 2006, 10:34 PM   #2
simon5 is offline simon5  Canada
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The Vas is quite high, I would build a cabinet larger than that if you can. Those are 10 inchers?

Parameters seems wrong, or efficiency is really low... Xmax is low also...

Good luck!
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Old 25th January 2006, 07:03 AM   #3
Volenti is offline Volenti  Australia
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Parameters appear correct in bassbox pro (at least not obviously impossible)

I came up with a 3.5cuft vented box for the pair with a single 4'' x 10'' long port.
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File Type: gif 10 sub pair.gif (16.9 KB, 401 views)
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Old 25th January 2006, 12:03 PM   #4
croat47 is offline croat47  United States
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Default One...or two?

Volenti...think it would be okay to make two single driver subs. Maybe one per side (in a big room), or for use in two different systems?

I don't need anything to shake the house...just the filling in of the lower registers for a fuller sound.

Thanks for the help!
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Old 25th January 2006, 12:35 PM   #5
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What are you crossing them to?

Are you going to use amplifier bass management to cross to them?

Or do you have pre-out / power in on your amplifier, so you can put an active crossover in there?
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Old 25th January 2006, 12:54 PM   #6
croat47 is offline croat47  United States
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I would just be using a plate amp to start. So, onboard, no active crossover...yet. That would be down the road. Maybe I will use one driver for the plate amp setup. Then hold one for playing with an outboard amp and active crossover setup.
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Old 25th January 2006, 01:24 PM   #7
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What I was getting at was integrating it with your other speakers. How low do they go?

I've never tried simply adding a sub on top of an existing system (because I've always had an AV amp with bass management).

If this is a replacement sub in a sub/satt system I suppose it is a straight swap.
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Old 25th January 2006, 01:53 PM   #8
croat47 is offline croat47  United States
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Sorry...misunderstood for my part.

The existing speakers go down to 70Hz. It is not replacing another sub. This would be the first in the system.
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Old 25th January 2006, 02:22 PM   #9
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and can you put a crossover in between your current pre/power amp?

I'm thinking dual sealed subs, active stereo crossover: >200Hz to existing amplifier <200Hz + Linkwitz Transform to new plate amps or chip amps.

That'll be about as 'musical' as you can get.
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Old 25th January 2006, 02:28 PM   #10
croat47 is offline croat47  United States
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Quote:
Originally posted by jimbo1968
and can you put a crossover in between your current pre/power amp?

I'm thinking dual sealed subs, active stereo crossover: >200Hz to existing amplifier <200Hz + Linkwitz Transform to new plate amps or chip amps.

That'll be about as 'musical' as you can get.
That sounds like a plan. Now...what box volume? I was looking at 2 cuft at the largest, but the SAF would go up with smaller boxes .
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