What would you build?

croat47 · 24th January 2006, 07:35 PM

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?

simon5 · 24th January 2006, 10:34 PM

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!

Volenti · 25th January 2006, 07:03 AM

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.

croat47 · 25th January 2006, 12:03 PM

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!

jimbo1968 · 25th January 2006, 12:35 PM

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?

croat47 · 25th January 2006, 12:54 PM

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.

jimbo1968 · 25th January 2006, 01:24 PM

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.

croat47 · 25th January 2006, 01:53 PM

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.

jimbo1968 · 25th January 2006, 02:22 PM

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.

croat47 · 25th January 2006, 02:28 PM

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

.

24th January 2006, 07:35 PM	#1
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	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?

24th January 2006, 10:34 PM	#2
simon5 diyAudio Member Join Date: Nov 2004 Location: Québec, Québec	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! __________________ DIYaudio for President !

25th January 2006, 12:03 PM	#4
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	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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25th January 2006, 12:35 PM	#5
jimbo1968 diyAudio Member Join Date: Nov 2004 Location: UK, bristol	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?

25th January 2006, 12:54 PM	#6
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	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.

25th January 2006, 01:24 PM	#7
jimbo1968 diyAudio Member Join Date: Nov 2004 Location: UK, bristol	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.

25th January 2006, 01:53 PM	#8
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	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.

25th January 2006, 02:22 PM	#9
jimbo1968 diyAudio Member Join Date: Nov 2004 Location: UK, bristol	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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