What would you do with an AESpeakers TD18H?

No.... I'm not going to send it to you




I had wondered about the benefit of the tapped horn. At this enclosure size, for this bandwidth it seems about 3db more efficient. But with the TH at 1200W there's a wopping excursion peak to nearly 20mm - am I right in thinking that there'll be (BL?) compression at this point and it won't actually translate to increased SPL? But this is how Danley's boxes are rated....



The vented box (350L, 32hz) at 1200W is within linear Xmax above 30hz and won't even need a high pass filter to stay within Xmech. Just need to add a suitable sized port to avoid compression there.


The TH starts to become more convincing above about 450L, but that's getting significantly less portable.




I'll buy more if I get enough business!



Quote:
My guidelines/rules:

Bandwidth: roughly 30-100hz
High spl for PA usage, though the response still needs to be "hifi"Box must be portable (I'll let you decide what that means)

No inductors unless you pull of something really special with it.

Xmax 14mm, Xmech 20mm. - Nick McKinney said it's safe to Xmech

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haha. almost mutually exclusive sets.


pro audio: 6 cubic footer tuned to 40hz. here you are trying to maximize the 45hz+ region.


hifi audio: 8 cubic footer tuned to 20-24hz. here you are trying to provide extension down to about 18hz or so in room.


the former will provide almost 8db more max spl around 50hz, but the extension goes to crap. you'd be lucky to hear any



Quote:
Originally Posted by findbuddha /forum/post/16871739


I'm looking in the middle, as I don't need 18hz - I don't care much for movies. And my hope for this PA rig (TD15M apollos + TD18H) is quality before quantity - but if there's not enough quantity it's not really PA is it?

I'm a newb!!

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newb's are welcome.


18hz is not just for movies. there are lots of music instruments that play into the 20's.


you 'could' tune up to about 27hz and still be in hi-fi range, that would provide you with usable down to about 22hz or so. p.a. rigs don't tune that low however.


since you say, "quality over quantity", maybe a 27hz tune would work best for you.



Quote:
Originally Posted by Looneybomber /forum/post/16872913


Umm. TD15M-A's? What will your speakers consist of? The reason I ask is you may be able to skimp, IE, but cheaper woofers than the TD15M-A's, and with the money you save, buy a second TD18.


I know Augerpro is selling 2 Faital Pro 12w300 for 200shipped. Buy two more 12w300's (for the other speaker), match it up with a CD and horn and have yourself some pretty potent speakers...

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great point.


this one goes for about half the money of the td15m's:

http://www.eminence.com/pdf/kappalite-3015.pdf


the bms 15s320's are pretty inexpensive too and pretty high quality:

http://www.bmspro.info/fileadmin/bms...320_t_data.pdf


you can get them here:

http://www.assistanceaudio.com/02_BMScones.html

Drivers are already ordered


This build started out as my "last-ever-upgrade", hence wanting the apollos. Then I realised I was building something that could play PA loud, so I thought I'd give that a shot.



Is it possible to create an adjustable port using 2 pieces of PVC pipe? I could change the tuning to what I needed at the time.



I'm also looking at some T-TQWT alignments in hornresp - they seem to be better size and excursion wise, but I'm not sure the best way to design them yet.





Thanks everyone



Quote:
Originally Posted by Looneybomber /forum/post/16872913


Umm. TD15M-A's? What will your speakers consist of? The reason I ask is you may be able to skimp, IE, but cheaper woofers than the TD15M-A's, and with the money you save, buy a second TD18.


I know Augerpro is selling 2 Faital Pro 12w300 for 200shipped. Buy two more 12w300's (for the other speaker), match it up with a CD and horn and have yourself some pretty potent speakers...

Click to expand...

The 12w300s are already sold to me (I couldnt resist the price)


Budda has the BMS4550/QSC waveguide already too. Im buying and shipping them too him (update, QSC waveguide is here the BMS4550s are not yet).


Its going to be an incredible match with the TD15M....I hope he posts his crossovers too



Quote:
Originally Posted by penngray /forum/post/16874669


Budda has the BMS4550/QSC waveguide already too. Im buying and shipping them too him (update, QSC waveguide is here the BMS4550s are not yet).

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Thanks for the update

The system we did for Elite Audio here in GB uses each TD18H+ in about 8 cubic foot net tuned just under 30hz. We did a 10" diameter PVC about 13" long. He uses 6 per side for his large system, run off of the Lab Gruppen PLM10000Q. For 1000W range you'd still want a highpass just under 30hz. For higher power use, we taper off the low end starting about 45hz and being 6dB down by 30hz in addition to the highpass. This greatly lowers excursion and gives more ability to play louder at the higher frequencies.


This was the first system where we really got confirmation of how good the TD18's sound. His previous woofers were the B&C 18TBX1000's. The small Elite system had a total of 4 of the B&C woofers. Upon swapping the TD18's in the difference is amazing. My favorite track for bass test is the beginning of Duende by Black Light Syndrome where Tony Levin plays some quick notes. On the B&C's it is simply a rumble that changes frequency. On the TD18's you can clearly hear each note being played individually. He had REALLY overdriven the TD18's one night with 2500W each and with the highpass all the way down to 25hz he had torn surrounds on 4 of the drivers. He swapped the B&C's back in and the difference was even more apparent when going back. In addition to that, he claimed at high levels he had to bring the B&C level back up by 3dB in the processor to stay matched with the mains as power compression on the B&C's was much worse. Anyone in the Green Bay/Appleton area is welcome to come out to hear his system. He runs it 3-4 nights a week. Just did sound for Rusted Root last night.


John

Thanks for the info John

Rusted Root. I saw them some years back.


So yeah. I think just a simple vented build like John has recommended is the best solution 7 or 8ft tuned in the 30hz range should be great. I like the idea of a TH build but there are other drivers that simulate better results with that enclosure type. Definitly double up and get the 2nd TD18 if you are doing PA work.

Well Ive been really happy with mine. I know you've seen my thread so I wont post it here. Eight feet, 25 hz. The eight inch port has proven to be chuff-free and Ive taken it to clipping trying.


Id be interested to see the results of a different alignment if you go that way.


I still cant get over what this thing did to my system. Just the perfect bass Ive been looking for. If I ever get any time (unlikely) Ill order an 18 sound 184lw or whatever and swap in in to compare and contrast.


Unless you can get the horn to work, maybe go smaller on the box and bump up the tuning as has been posted. With an EBP of 126, sealed is out.


Anyway, good luck, I think you will be pleased.