HD2x15 / USB Driver advise

Hi all,
I’m very tempted to build 2 HD15s side by side, like the old Turbosound tse 2x15... to go under 4 Turbosound tse 111s.... HD15s fit my size limits perfectly, frequency wise I’m only after 50hz and up so don’t need anything lower...

2 HD15s look good to me in hornsrep with the driver I have picked, but I’m concerned the driver might not be strong enough and have enough Xmax.. I’m looking for some advise on this driver and weather it will work and if the results will actually be close to the hornsrep predictions

If not I need a neo driver that will work in this design and give a good solid 55hz to 50hz On up.

Driver is a fatial pro 15PR400 4ohm..

Hornsrep result of 2 HD15s and diver attached

Thanks
Luke
 

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Some thoughts:

1 - Are you sure you only need to get to 50Hz?
2 - Have you checked the excursion plot? Front-loaded horns tend to have a large bump in excursion towards the bottom of the passband.
3 - Will the pair of 15"s really keep up with 4x horn-loaded mid high boxes?

Chris
 
Some thoughts:

1 - Are you sure you only need to get to 50Hz?
2 - Have you checked the excursion plot? Front-loaded horns tend to have a large bump in excursion towards the bottom of the passband.
3 - Will the pair of 15"s really keep up with 4x horn-loaded mid high boxes?

Chris

Yeah definitely don’t need below 50hz.

I don’t trust the hornsrep predictions on Xmax, it said it would be at maximum with only 100w of power.. and it said that no matter what driver I put in it.. But I’ve read about People using drivers with even less xmax in the design up to 600w with no problems..

It’ll be a pair of HD15s aka hd2x15 per side

Yeah I plan to run them from 50hz to 250hz, like the original Turbosounds and funktion ones.. I don’t mind having a bit of honk, it’ll help cut through the mix.
 
It's not just a "bit of honk", it will get very painful (and annoying) after a very short time.

The TSE111 was designed to be used with, amongst others, the TSW118. Basically a TMS4 split into two cabs, which is an awesome sounding box. If you Google TSW118 and look at the Images tab you'll see plans for it.
 
The tse111 were supposed to be me matched with either tse 115 / tse215 / tse 118 and the tse 218.. the HD15 is a pretty close copy of the tse115, I just planned to join 2 together to make a tse215..

I’m going to be useing it for live sound work, mainly 60s 70s 80s classic Rock Band, so loads of low mids will be fine, if anything I’m after loads of 80hz to 300hz more that 50Hz to 100hz.. I want that massive slam in the chest that frequency will provide. With the right crossover settings on the tse111 and a double Hd15, I can get them to cross at around 200hz without any issues... I’m currently running 4 THam 12 as high as 250hz and it sound absolutely fine, just needs more spl and punch so planning on swapping thams for HD’s as long as I can find the right driver.
 
A TSE111 down to 200Hz? Correct settings for these is HPF @ 250Hz/LR24. At full tilt 200Hz will destroy the MF driver eventually... I've seen that done before!

Turbo (and others) managed to get BP horns up to 250-300Hz because of the drivers they used. Instead of the current style of drivers that go for huge voice coils, they used lighter coned, smaller voice coiled drivers. Only trouble is getting hold of those drivers due to their age... Fane 15b, PD 1550 (MKI not MKII), etc. JBL2226 does work in the HD (etc) but needs lots of power to, say, match the 15b.
 
The Eminence kappa 15c is well regarded for working in the Klipsch La Scala basshorn, which is a 'hifi' W bin. The only thing it hasn't got is good xmax.

It's one of the only drivers I've found that I could buy new and use in old school basshorns.

(I'm currently using a pair of EV15L's in 80Hz horns)

Cheers,
Rob.
 
Lascala well.. it can be made a lot better with some modifications (mouth bracing, reflectors etc..). But it is not well suited to go down to 50Hz without horn (or room) extension.

Martin 115 bass horn is pretty good too for midbass/low midrange. 4 or more stacked and properly driven will rip your face off!
Not to forget martin 215 series (dual 15"), they do ok up to 250-300Hz.
Martin 215 MKIII
 
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For a basshorn to 50Hz, you need a much larger horn than those HD15's. They are used sometimes still as "kickhorns" on reggae soundsystem (wich means 90hz to 250-300hz) wich is their usable frequency range. If you want a below "50hz" wbin, you need something like the Earthquake 844 W bin.
 
Well after going back and checking the old Turbosound info. It seams if you read the fine print And check there own graphs there 45hz clams on the tsm4 Are well off and only just reached 55hz.... with the TSE2x15 that I’m trying to copy with the HD2x15 it calmed 60hz to 500hz, unfortunately they didn’t print a graph with it, but if you look at the TMS3 graph witch is identical to the TSE2x15 in every way, just had 2 tse111s glued to the top, it does reach 60z, maybe 55hz at a push.. I think with modern drivers it could definitely do 55Hz to 250hz.
 

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I know from experience that you can't. I used those old Turbosounds, and they are not fit for the bottom range, they are midbass aka kickhorns (90 to 300Hz) that needa sub below them. If you want a W bin as sub, you need something bigger like those EAW's.