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Old 12th October 2011, 08:59 AM   #1
spot is offline spot  Australia
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Default Driver recommendation for smallish sealed subwoofer

Could anyone recommend a driver for a sealed subwoofer, 12" and about 47L or 1.75 Cuft cabinet?
Preferably available in Australia and under about $200, less if overseas.

I have seen a peerlees XXLS model that looks good - its discontinued (don't know if there's any left).
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Old 12th October 2011, 10:05 AM   #2
forr is offline forr  France
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Hi, you may find the Peerless XLS. I use it in a 42 liters closed box wiht no damping, fc = 41 Hz, Qtc = 0.47 and add a bit a bass boost. I should have done better with about 50 liters and some damping.
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Old 13th October 2011, 03:08 PM   #3
johnr66 is offline johnr66  United States
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That volume is not particularly small for a 12" in sealed. Start by looking for drivers in the .4-.5 Qts range. Plenty available. You should model what you find to see how it will actually work.
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Old 13th October 2011, 03:38 PM   #4
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No useful concrete recommendations, as the 12's I picked up CHEAP are no longer available. They were unsuitable for a small sealed box, but isobaric'd (2 clamshelled) they compared very favorably to a single driver in price and and handled a lot more power; efficiency was bad compared to the same drivers in a larger cabinet, but not so bad compared to other drivers that worked in such a small cabinet. But if you find an exeptional buy on an unsuitable driver like I did, consider isobaric to make it work. Makes a great teensie "dense-pack" box IMHO.
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Old 13th October 2011, 04:20 PM   #5
Tytte71 is offline Tytte71  Norway
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Are you planning to run it with a separate subamp?
If yes, what's maximum cont. output power and does it have bass eq to compensate for the roll-off?
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Old 14th October 2011, 02:53 AM   #6
spot is offline spot  Australia
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Quote:
Originally Posted by Tytte71 View Post
Are you planning to run it with a separate subamp?
If yes, what's maximum cont. output power and does it have bass eq to compensate for the roll-off?
Yes, power yet to be decided. I will be putting in all sorts of freq compensation.
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Old 14th October 2011, 04:12 PM   #7
Tytte71 is offline Tytte71  Norway
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Quote:
Originally Posted by spot View Post
Yes, power yet to be decided. I will be putting in all sorts of freq compensation.
Then you shouldn't be concerned about using low Q drivers or not. The only things that counts for maximum sound pressure with a sealed enclosure is power, membran area and linear stroke range. Low Q drivers are most likely to fit into a small cabinet. Off course the driver should be able to cope with the power (linear motor/spring behaviour and low power compression)

The XXLS is a good driver and is not discontinued by Peerless. One XLSS would give you about 96dB@20Hz/45l/150W + room gain - 4pi (within linear stroke). Using a high-pass filtre at 30Hz would leave a maximum of about 103dB@30Hz/45l/200W + room gain - 4pi.
The 12" XLS is also an alternative, same maximum output (a little better impulse response) but will require a little more power.

You could also consider the Dayton TIT320C-4 that would leave you about 4dB more output than Peerless when feeding it with 500W (large signal analysis available at parts-express.com)
Also, the TC Sounds Epic 10 can deliver some 3dB more than Peerless at 20Hz/500W.

A better solution would be to use two or more smaller ones (like a long stroke 10"). That way you can more easily deal with room modes.

That said, I would rather have gone for a low tuned passive radiator solution - unless your listening room is small.

cheers,
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Old 14th October 2011, 06:55 PM   #8
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Spot, hope you don't mind me weighing in here, but it may apply to your question as well.

I'm going to return a Viva NE 12 inch driver for exchange with another 12 inch. I've decided, after a few threads posted and many questions/answers that there are better drivers than the Vifa for sealed 12inch sub duty. I'm looking at the RSS315HF-4 but see no mention of it in this thread. I'm certain that I want a 12 inch sealed sub as well. But am wondering if the RSS315 is the way to go. Mine is for 99 percent music.

There seems to be a bit of disagreement floating about as to the RSS315's suitability for a sealed box and then I found this page....
Dr. Mark Says Speaker projects
Quote:
I’m have added data on the Dayton RSS315HF-4 12. This driver could make an impressive sub. However the unit requires a large volume enclosure, around 5 cu.ft. This driver is not suitable for sealed alignment, as the F3 is in the mid forties, well above sub range.
So I'm asking mostly the same question here. What is the best 12 inch driver out there, in the 150 dollar range, for an approx 2cu ft sealed project?
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Old 14th October 2011, 11:45 PM   #9
Tytte71 is offline Tytte71  Norway
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Quote:
Originally Posted by peace brainerd View Post
Spot, hope you don't mind me weighing in here, but it may apply to your question as well.

I'm going to return a Viva NE 12 inch driver for exchange with another 12 inch. I've decided, after a few threads posted and many questions/answers that there are better drivers than the Vifa for sealed 12inch sub duty. I'm looking at the RSS315HF-4 but see no mention of it in this thread. I'm certain that I want a 12 inch sealed sub as well. But am wondering if the RSS315 is the way to go. Mine is for 99 percent music.

There seems to be a bit of disagreement floating about as to the RSS315's suitability for a sealed box and then I found this page....
Dr. Mark Says Speaker projects
So I'm asking mostly the same question here. What is the best 12 inch driver out there, in the 150 dollar range, for an approx 2cu ft sealed project?
There are many ways to design a subwoofer.
If you want to use a straight forward amp without any eq, then I (conditionally) agree with the statement. But if you have an 4-500W amp with bass boost or better a DSP controlled amp, then the RSS315HF-4 could make a great sub in a filled 2 cu ft cabinet. Unfortunately I don't have available large signal analysis of this driver. Peerless XLS is a good alternative.

Be aware that one 12" closed cabinet sub might not be enough to achieve realistic sound levels. It depends very much on your room and placement. In my living room I use 2 long stroke closed cabinet subs, corner placed and with DSP/DRC - which is far from enough for my room.
No I am not a head banger and I am not a bass fanatic
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Old 16th October 2011, 04:18 PM   #10
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For the time being my needs are similar to Spots. The plate amp I have on hand is a Foster 100w sub amp from the NHT sellout page. I'll live with it for a while and upgrade to a 500 w bash amp later. The existing oak cabinet I'm using has 4.2 cu ft available at present. So I can make it anything from .5 to 4.2 cu ft. I'd like to go sealed. In this case, and similar to what Spot is asking, if focusing on the Dayton offerings, which would be optimal for a small(ish) sealed box..... the 12 inch HO, the 12 inch HF, or the 12 Titanic? 98 percent music at moderate levels.
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