These are in preparation for my basement HT project that I'll start hopefully soon. My plan is to have TLAHs for LCRs and maybe for surrounds using less drivers. THT for the low end of course.
I have the plans for the Bill Fitzmaurice TLAH and THT. I've been working on my wife's attic project for the last year and couldn't stand it any longer. I finally built something.
I CNC'ed the LCR baffles and side pieces, but you could easily use a jigsaw.
The rest was cut on the table saw. The build is really quick with an air brad nailer and the polyurethane glue. There are only 5 pieces of wood, but a bit of wiring with all of the drivers. I decided on eight JVC 3x5s and six 1016 piezos so the total for each box is $22! I'm told the piezos need EQing, which I do agree with. Hopefully I'll have a receiver with Audyssey soon.
I started this am and have one functioning speaker already. I could have another couple in 2 more hours, but I'll do that in a day or two.
Oh, and it sounds pretty nice! I'm not an expert, but I don't think you can beat it for the price. I get good output at about 1/10 with just one, so all three at max would be hearing damage levels.
Here's another video for fun
Oh, and I built that CNC with only 800-1000 hours of work!
For most things, doing it by hand is quicker. It took me about 1 hour to setup the programming for the CNC. It takes maybe 3.5 minutes to cut each piece. I only did it this way because I'm thinking I might do the same thing for the surrounds with maybe 4 of each driver.
Brad, these things are so easy to put together, it's ridiculous. If you want a set, let me know and you can watch me CNC them. Also let me know if you want to listen to them once I have the second one made.
One more video making tapered sides.
I can't wait to make a THT (even more so after hearing bbowers'). Unfortunately the room I'm in right now is pretty small. That, and since it isn't sound isolated I would definitely disturb our neighbors. I'm sure I could get the THT built in a weekend. Having said all that, I'll probably build it sooner than later.
I had both TLAHs built and running as of last night. They sound great! I'm getting a mic from a friend so I can run REW so I can get the freq response tuned a little better. I used sine waves to tune the system by ear.
Looneybomber: the machine runs really fast. I've cut 4x that fast with this CNC! No need to with non-production work.
jleonard711: I used a lot of info from CNCzone.com. I designed it myself based on what I would be making (RC slope wings) and what parts I could source. That CNC you linked to looks cool. I'm sure that website wasn't up when I built my CNC. I don't know if you can tell, but the machine I made is welded steel -- very strong and 600+lbs. I can cut 78" x 26" x 12". It rapids at 1200 IPM and I have cut at 800 IPM. I'm using 1 HP servos on all axes.
Your going to love th THT with those too...they are pretty insane...great work!
I'm building 3 for the fronts. I think I might make 4 for surrounds, but with 4 woofers and 4 tweets (as opposed to 8 and 6 for the fronts). I made the fronts 51" long to fit all of the drivers, but I'd go to 40" for the surrounds. I may also try to make them a little slimmer so I can make them flush with any wall treatments I put in the room so I can hide them.
I see you built TWO THTs! I heard one at 1/4 volume in an unenclosed room and it was moving the floor.
I'd love to CNC dados into the sides of the THT, but it is too large for my machine. Actually, I could do that with the low profile version. I think the build will be easy enough.
By the time you figure in driving time you could just build them yourself! Wiring them takes longer than anything else, and that's only maybe an hour per.
This was a really worthwhile project for less than a day's work and at $25 a speaker!
You gotta straighten up those drivers though--a bit crooked here and there
I love that CNC though--good work there.
Man, you probably even just had it pre-drill screw holes for you too...You could seriously make a nice little speaker building business with that .
Starkiller: with only 800+ hours and thousands of $$$$ you can build a CNC router too. Of course you could just pay a few hundred dollars and have someone make the speakers for you....or spend $50 and a few hours and make them yourself! The CNC is great when you want to make dozens of pieces or have a very precise part, but otherwise doesn't make much sense -- even if you have a CNC available!
Starkiller: Welding is fun and you can get your investment on a welder back with a couple of small jobs. A CNC is a lot more expensive (and time consuming if you make it). A CNC will only earn its money back with a lot of parts. Check out www.emachineshop.com It could be an alternative for you.
Everything I said about the CNC is to make a "good" CNC, mind you. If you want to make a small, cheap CNC out wood, that is going to give you a certain level of speed and accuracy compared to a larger steel CNC with industrial parts. A small, cheap CNC will take a lot less time and money to make.
That's what Bill said: http://www.avsforum.com/avs-vb/showt...n#post18022491
He said it elsewhere too if you look up dispersion. Let us know if aiming them differently helps. I know the vertical dispersion is less the longer the array. That and the fact that the surrounds are much closer make me think that a 4 speaker array might be what I want for surrounds.