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Old 12th April 2012, 04:18 PM   #1
fhperez is offline fhperez  United States
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Default 18" TH Build Options

So I am going to be building 2-4 18" TH's.

My requirements would be for them to be louder than my 4 ss15's (which I LOVE)

My Budget would be about $300-$400 for the speakers and maybe $80 for the wood, so about $500 per speaker cabinet...

My best option so far is the latest c/e/x pa flat to 30 design.

C/E/X PA Flat to 30 (FT30) PA TH Awesomeness

Then I've been keeping up with the Keystone Sub and Xoc1's 18"

The obvious question is which is better option.. lol.. (which i know does not tell you much)

I am a DJ who for the most part will only use 2 or 1 sub of this size, but there are venues that hold anywhere from 800-1,600 people where I will be performing...So for those venues I will need 4 subs minimum.

My next question would be, how would 4 th's compare to 4 srx728s (which most bands here locally use) Compare DB's as well as frequency response...
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Old 12th April 2012, 05:45 PM   #2
jbell is offline jbell  United States
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are you wanting louder or lower? Most of the 18" TH's go lower...
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Old 12th April 2012, 07:43 PM   #3
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Quote:
Originally Posted by fhperez View Post
Then I've been keeping up with the Keystone Sub and Xoc1's 18"

The obvious question is which is better option.. lol.. (which i know does not tell you much)

My next question would be, how would 4 th's compare to 4 srx728s (which most bands here locally use) Compare DB's as well as frequency response...
PASC built both, and wrote the Keystone has better cone control than the Xoc1 TH18, and measures a little louder on an SPL meter.
The Xoc1TH 18 has a bit less steep LF rolloff than the Keystone.
The Xoc1TH 18 uses slightly less truck space, and has quite a bit less frontal area than the Keystone. In multiples, the extra frontal area of the Keystone should give it more forward directivity (louder on axis) than the Xoc1TH 18.

The Keystone loaded with a B&C18SW115-4 has a similar sensitivity and frequency response shape as the JBL SRX 728. The B&C18SW115-4 has about 15 mm Xmax compared to about 9mm for the SRX 728, so given enough power can go quite a bit louder, and is a bit smaller.
The new B&C18TBW100-4 is cheaper (but heavier) than the neo 18SW115 and can go almost as loud.

Art
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Old 13th April 2012, 02:27 PM   #4
fhperez is offline fhperez  United States
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Thanks Art..

I have been keeping up with all 18" Threads, so I have seen that.. but there is not one thread to compare and contrast all 3 of the ones that I am inquiring about... and If I am going to invest around $2,000 I want to get it done right the first time, with the best available option... The hardest part is not being able to hear them ahead of time.

I am super impressed by the SS15 and If I didn't do super large events from time to time, I would be perfectly fine with the 4 SS15s.



Jbell - If I were to chose between Lower and Louder, Louder.

I've heard 4 SRX 728s and that's what I want.. Ground/Wall Shaking Bass at an 800 PPL event inside a 20k sqare foot building.

So maybe the Keystone Is the best option, my only concern is.. Looks and it seems as if it would be hard to pole mount a speaker on top of it...

I am liking the B&C18TBW100
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Last edited by fhperez; 13th April 2012 at 02:30 PM.
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Old 13th April 2012, 03:42 PM   #5
jbell is offline jbell  United States
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flipc has a dozen ss15....

just sayin if you don't want lower, maybe more of what you have is the lower cost option to get what you want?
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Old 13th April 2012, 03:59 PM   #6
fhperez is offline fhperez  United States
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Jbell... the tradeoff is space requirement in my trailer... I also do Lighting Decor, so my uplights take up a lot of real-estate in my trailer... So 4 is the max I have room for in my trailer (6x12) That thought did cross my mind, to build 4 more... I do love the weight difference..
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Old 13th April 2012, 04:38 PM   #7
tb46 is offline tb46  United States
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Hi fhperez,

Post #6: "...the tradeoff is space requirement in my trailer..."

It will be very hard to beat the SS15 on a dB/ft^3 basis. Also, why limit yourself to a specific constructions? If you like the B&C 18TBW100 it's easy enough to design a fitting model in Hornresp, and you can push the SPL/low frequency extension point to where you want it. Then you can still pick a basic layout from all the ones here as a starter point, or you can optimize the form factor for your requirements. This topic has now been around long enough, that you can arrive at predictable results in the model, if you have a quality driver with known T/S parameters.

Regards,
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Old 13th April 2012, 05:33 PM   #8
jbell is offline jbell  United States
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If you're in love with the 18tbw100... (and I admit, it looks attractive) it sims nicely in the ss15.

Buy a driver, make an adapter plate board and try it out. It'll give you an A vs B of what you currently have, and will help you make a decision on how to move forward.

Looks like you can pull another 5-6db over the 3015lf in the same cabinet due to greater power handling and greater xmax.

As oliver says though... better to make a cabinet that really fits, instead of trying to stuff an 18" into a 15" cabinet.
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Old 13th April 2012, 08:38 PM   #9
fhperez is offline fhperez  United States
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I like Oliver's idea, that would take some more time...

I love that Idea JBell.. on that plate... would it be a plate to fit and cover up the 18" I guess I don't know how i would go about the plate.. but I can order 2 of those right away...
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Old 14th April 2012, 02:08 AM   #10
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If you are really concerned about space and want maximum output per cabinet you should go with the B&C sw115 in the keystone. And for four of them you'd better have 8000rms + to really shake things up.

Art is using 2000rms per cabinet if I remember correctly and has stated he would like double that for each!

I know you have a budget but in your case it might be worth it in the long run to save a little longer and go with the better driver and bigger amps.

Just a thought
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