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Old 28th May 2011, 07:31 PM   #101
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Quote:
Originally Posted by hawkson View Post
Thanks TB46. The graph you posted seems underwhelming. I am not sure I am reading it right, but LMS ultra 5400 achieving only 90 dbs at 20hz, is that right? BTW< I have Lab Gruppen 14000 powering these.
It's simulated in 1/2 space with 2.24V of signal (~1.3W) and a single driver.
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Old 28th May 2011, 07:50 PM   #102
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Originally Posted by hawkson View Post
huh, approximately how big would a ppsl be with 2 LMS Ultra 5400s?
The same size as two sealed or ported etc in one enclosure that gives the desired tuning, plus the volume of the manifold.
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Old 28th May 2011, 11:45 PM   #103
tb46 is offline tb46  United States
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Hi Y'all,

As I said in Post #97 it's "just a quick simulation", I didn't know what hawkson ment w/ "...Should I only make a 1 sealed?". figured it was pretty obvious, that these are only single driver models. I used 1W into 5 Ohm to let Hornresp calculate the Eg; with a Re of 3.78 Ohm, and a Le of 2.8 (which is probably higher in the below 100Hz range) I am guessing that that is closer than 1W into Re (3.78 Ohm).


hawkson: If you need more output, you should take another look at Josh Ricci's TH. Naturally, it is a lot bigger. The 1W output also does not tell the whole story (see GM's Post #98) of what this driver can do. You may have to do a little modelling yourself.

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Last edited by tb46; 28th May 2011 at 11:51 PM.
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Old 29th June 2011, 05:06 PM   #104
jdubs is offline jdubs  United States
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Ok, so I'm think of using Eminance Kappa 15 drivers in a PPSL. Two cabinets with a Unity horn over each to cover 300hz on up. Are there plans out there for a 15" PPSL? I don't have access to wood-working tools, so I would need to contract someone to build them - so plans are needed.

Thanks fellas.

-Jim
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Old 30th June 2011, 09:47 AM   #105
djk is offline djk
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PPSL is a concept.

No plans are offered because they would only be for a specific driver, and thus be useless for most people.

I can give you a basic design if you like. Is this for PA or home use?
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Old 30th June 2011, 12:06 PM   #106
jdubs is offline jdubs  United States
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Quote:
Originally Posted by djk View Post
PPSL is a concept.

No plans are offered because they would only be for a specific driver, and thus be useless for most people.

I can give you a basic design if you like. Is this for PA or home use?
djk, that would be great. This is for home use....up to 300hz or so and down to as low as is practical. The Eminance Kappa 15" "seems" to fit the bill...but let me know if there are better alternatives in your mind.

Thank you very much!!

-Jim
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Old 30th June 2011, 02:55 PM   #107
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Hey guys. The difference in the parameters for the older "red" 5400 versus the current ones is negligible. If you want the older driver parameters I have a winisd file hosted at the home theater shack. I have measured and owned both. Measured data models very closely to factory data. After owning many TC drivers I simply use the factory data now. The differences are very small and arent enough to worry about.

Hawkson you would be looking at a 15" wide opening by 20" high x 20" deep at a minimum. You have a 12" deep, 18" driver with a 10.5" diameter motor that weighs 80lbs. You will need 3" clearance from the back of the other motor at minimum to be safe plus an inch or two of clearance to get the driver in the plenum with the other mounted. You would probably want a little more room than this even, as wrestling with and positioning 80lb drivers for mounting in confined spaces is not fun. Nor will be tightening the driver mounting screws in the back of the plenum. Plan accordingly. Also if you are using these in a domestic setting and only have the 2 drivers it would probably be best to make 2 separate subs so that you can even out the response. This would make more difference than lowering the distortion some but only driving the room with a single sub


Larry,
You already have the B&C's correct? I am not so sure about using them IB. They really aren't that well suited to it. There is no reason for the wicked strong motor and all of that power handling in an IB driver. If you don't already have them I would suggest something else for that type of setup.

Last edited by Josh Ricci; 30th June 2011 at 03:06 PM.
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Old 8th July 2011, 06:18 PM   #108
jdubs is offline jdubs  United States
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So, has anyone had any luck building a PPSL? I'd love to see plans for something that is proven to work well (I need something that goes up to 300hz).

-Jim
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Old 8th July 2011, 08:25 PM   #109
Scott L is offline Scott L  United States
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Default work is under way

I have started my pair, but work goes slow, because of, well: work !

That danged ole pesky requiremment to pay the bills!

I plan on using mine to 400 Hz. All I can say at this point, is stay tuned.
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Old 8th July 2011, 08:53 PM   #110
jdubs is offline jdubs  United States
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Awesome, Scott! I can't wait to hear what you think after you get them built.

What driver did you go with?

-Jim
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