For GM mostly

Andrewbee · 29th June 2005, 09:25 PM

HEllo GM,

I read of a design by you the "60" Jumbo JX design by GM" apparently its a TL sub for the Jordan JX driver.

Can you let me know some more?
I am thinking about trying a TL sub to mate with some OB speakers and wanted to give a TL a try.

Thanks

Andrew

GM · 30th June 2005, 03:47 AM

Greets!

Hmm, never seen any of my designs called this, but the JX150 is about 60" long, though it's a ML-TL:

T/S max flat:

L = 59.1"
CSA = 113.726"^2
driver down 21.33"
vent near/at the bottom
rp = 1.5"
Lp = 4.5"
density = ~0.2lbs/ft^3

All dims inside and you may need either a longer vent or damp it some if it's 'boomy' in-room.

GM

Andrewbee · 30th June 2005, 01:24 PM

Thanks GM. I read of it on the Audiocircle.

Andrew

GM · 30th June 2005, 02:07 PM

Greets!

Ok, another forum to add to my list.

Anyway, is this what you're looking for, or a true TL?

GM

Andrewbee · 30th June 2005, 05:08 PM

Hi again,

I am looking for a true TL. I plan on doing some on open baffles and am looking at a bass solutuion. The Visatons will go down to ~70 hz before rolling off I figure.
I have never heard a TL but from what I read, when properly designed and working they are very hard to beat for bass quality.

I have in the back of my mind a pair of TL's using perhaps an 8" driver.
Power/crossover will be most likely be from a pair of plate amps.
I am open to suggestions.

I was going to ask Dave D. as well, TL's are his speciality but methinks he is busy right now with the new CSS drivers and his website.

Thanks

Andrew

GM · 1st July 2005, 01:49 AM

Greets!

Yeah, he's busier than a one armed paper hanger.

OK, a simple end loaded, stuffed 'classic' style 28 Hz Alpha TL for the JX150:

L = 117.375"
CSA = 84.964"^2
suggested density = 0.781 lbs/ft^3 of polyfil (~72 oz)

GM

Andrewbee · 1st July 2005, 02:02 AM

Thank you kind sir.

Andrew

qi · 8th July 2005, 12:37 PM

Quote:

suggested density = 0.781 lbs/ft^3 of polyfil (~72 oz)

Hi Greg

WOW -- that's alot of stuffing!

Shouldn't it read .27 lbs/ft^3 of polyfil (not .78)?

Regards
Joe

GM · 8th July 2005, 01:03 PM

Greets!

It's correct for a 'classic' style TL, i.e. ~IB response with a highly damped Fs peak. Obviously, folks fine tune the stuffing to suit, but this is what he asked for and best for use with tube amps and/or integration with horns.

GM

qi · 8th July 2005, 02:53 PM

Hi Greg

The Alpha TL spreadsheet that you posted says .27 (not .78) for a Jordan JX150 -- hence my comment.

29th June 2005, 09:25 PM	#1
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	For GM mostly HEllo GM, I read of a design by you the "60" Jumbo JX design by GM" apparently its a TL sub for the Jordan JX driver. Can you let me know some more? I am thinking about trying a TL sub to mate with some OB speakers and wanted to give a TL a try. Thanks Andrew __________________ None of us are leaving this world alive. Enjoy it responsibly as you may.

30th June 2005, 03:47 AM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Greets! Hmm, never seen any of my designs called this, but the JX150 is about 60" long, though it's a ML-TL: T/S max flat: L = 59.1" CSA = 113.726"^2 driver down 21.33" vent near/at the bottom rp = 1.5" Lp = 4.5" density = ~0.2lbs/ft^3 All dims inside and you may need either a longer vent or damp it some if it's 'boomy' in-room. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

30th June 2005, 01:24 PM	#3
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	Thanks GM. I read of it on the Audiocircle. Andrew __________________ None of us are leaving this world alive. Enjoy it responsibly as you may.

30th June 2005, 02:07 PM	#4
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Greets! Ok, another forum to add to my list. Anyway, is this what you're looking for, or a true TL? GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

30th June 2005, 05:08 PM	#5
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	Hi again, I am looking for a true TL. I plan on doing some on open baffles and am looking at a bass solutuion. The Visatons will go down to ~70 hz before rolling off I figure. I have never heard a TL but from what I read, when properly designed and working they are very hard to beat for bass quality. I have in the back of my mind a pair of TL's using perhaps an 8" driver. Power/crossover will be most likely be from a pair of plate amps. I am open to suggestions. I was going to ask Dave D. as well, TL's are his speciality but methinks he is busy right now with the new CSS drivers and his website. Thanks Andrew __________________ None of us are leaving this world alive. Enjoy it responsibly as you may.


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1st July 2005, 01:49 AM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Greets! Yeah, he's busier than a one armed paper hanger. OK, a simple end loaded, stuffed 'classic' style 28 Hz Alpha TL for the JX150: L = 117.375" CSA = 84.964"^2 suggested density = 0.781 lbs/ft^3 of polyfil (~72 oz) GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

1st July 2005, 02:02 AM	#7
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	Thank you kind sir. Andrew __________________ None of us are leaving this world alive. Enjoy it responsibly as you may.

8th July 2005, 01:03 PM	#9
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Greets! It's correct for a 'classic' style TL, i.e. ~IB response with a highly damped Fs peak. Obviously, folks fine tune the stuffing to suit, but this is what he asked for and best for use with tube amps and/or integration with horns. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

8th July 2005, 02:53 PM	#10
qi diyAudio Member Join Date: Oct 2003 Location: .	Hi Greg The Alpha TL spreadsheet that you posted says .27 (not .78) for a Jordan JX150 -- hence my comment.

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