GM,
That is very, very cool. It appears to be most everything I'm looking for! The bass roll-off is very well suited to moderate sized rooms (I've got a big 40hz hump in this one, we'll see what the new house brings). It also controls excursion really well; better than the ML-TL's I've been simulating (and that IMO leads to lower distortion). I also think it is architecturally interesting (I just don't get the plain jane rectangular box folks, maybe it is because my wife is tolerant).
How far off the ground would you place that vent? Are you comfortable with a panel that large being unbraced?
I'm trying to think of a way to preserve that look without spacing it away from the wall too far. Maybe a 1x6 down the back connected to a wider platform.
Re: driver height, I may have taken the BIB's high drivers for granted. A couple of days ago a visiting toddler grabbed the whizzer on my OB drivers (only a couple feet off the ground). I'm going to pretend that he was trying to soften it a bit as GM sometimes recommends. The kid will be an engineer if his dad has anything to say about it (which means he'll probably be an oboe player).
pj
That is very, very cool. It appears to be most everything I'm looking for! The bass roll-off is very well suited to moderate sized rooms (I've got a big 40hz hump in this one, we'll see what the new house brings). It also controls excursion really well; better than the ML-TL's I've been simulating (and that IMO leads to lower distortion). I also think it is architecturally interesting (I just don't get the plain jane rectangular box folks, maybe it is because my wife is tolerant).
How far off the ground would you place that vent? Are you comfortable with a panel that large being unbraced?
I'm trying to think of a way to preserve that look without spacing it away from the wall too far. Maybe a 1x6 down the back connected to a wider platform.
Re: driver height, I may have taken the BIB's high drivers for granted. A couple of days ago a visiting toddler grabbed the whizzer on my OB drivers (only a couple feet off the ground). I'm going to pretend that he was trying to soften it a bit as GM sometimes recommends. The kid will be an engineer if his dad has anything to say about it (which means he'll probably be an oboe player).
pj
pjanda1 said:
Greets!
Thanks!
Yeah, lots to like in a 10:1 TQWT. BW limited, 'tapping' (6th order BP TL, aka T-TQWT) them makes for an impressive alternative to a conventional (sub)woofer system.
Whatever gap works best in-room, of course! I mean why 'paint yourself into a corner' with a fixed gain vent? 😉 If you prefer it though, make a slot vent of the same area in one of the bottom sides.
'Large panel'/'unbraced'/'GM' = oxymoron as a general rule. 😉
Hmm, not sure what 'look' you're referring to. I mean tall/wide, flat baffles are what they are, so considering its height/Vb, its depth is so shallow that at a glance, converting it into a tapered triangle seems the best solution overall with a 'dorsal fin' as its third 'leg' or if you prefer four mounting points, then make it an angled 'whale tail' or similar. Lops of ways to 'dress' it up.
Kids are quite 'handy', especially during the driver's 'breaking in' period. 😀
GM
Any chance the Hemp FR8.0diyhq would work well in this enclosure? I have a pair lying around that were originally meant for BIBs...
Thanks!
Will it work equally as a right or equilateral triangle? I am drawing it up and will decide between this or one of the MLTLs you and Scott drew up a while back. It will be placed back up against a wall, possibly one corner, in a large (50 m2) room.
Will it work equally as a right or equilateral triangle? I am drawing it up and will decide between this or one of the MLTLs you and Scott drew up a while back. It will be placed back up against a wall, possibly one corner, in a large (50 m2) room.
You're welcome! Just like a horn, maintain its area expansion rate and you can shape/twist it like a pretzel if you like.
GM
GM
I wish I could say I had built a pair. I've certainly recommended it to folks (both in that thread and in emails), but the width is a tough sell. I played with TQWTs for awhile, and this was the end result. As I wrote in that thread, I did it with pretty serious space constraints and ease-of-build in mind.
My personal system has taken a turn toward the complicated. I've got two way biamplified open baffles filled with the Wild Burro Field Coil prototypes and 15" woofers on the bottom. The Burro speakers have a passive line level crossover, the woofers are controlled by a miniDSP. Below that, I'm running a large and low tuned tapped horn sub filled with a Tang Band W8-740. The DSP also controls it. I'm amused that I have 8" drivers sandwiching nice big woofers that only cover an octave or so. I know you (GM) believe in solving acoustical problems acoustically, but boy does a DSP simplify in-room bass.
Back to the 10:1, I'd still love to try one. I've just been awfully busy and it wouldn't make very good use of the four channel PA amp I'm using to drive all my woofers!
Paul
Wild Burro Audio Labs - DIY Full Range Speakers
Yeah, truth be told, I was an early adopter of DSP back in '78 with the dbx 4BX, 224X, 10/20 combo that cost more than my entire then well above average HIFI system plus the sale proceeds of some other stuff. I wasn't smart enough to buy replacement remotes, etc. as prices plummeted on closeout though [too advanced for its time apparently], thinking at the time that technology would render them antiques by the time they died and in some ways this was true, yet not so much as it turned out.
Anyway, a great way to dial in a system, especially a multi-way horn one, then use the data to improve it acoustically as much as practical, though even in this scenario, over sizing cabs/whatever is still desirable since it increases tuning flexibility.
As for dialing in subs, this has only become an issue fairly recently for most folks and I'm fortunate to have an acoustically open room, so not much of a issue for me except needing one up the wall a ways to deal with the floor/ceiling modes. Still, where folks can 'afford' the solution, multiple subs is the way to go, though with no experience with them in a relatively small room, don't know how much DSP will help except with placement.
Field coil, eh? Cool! Nothing like it for dialing in BSC.
Well, folks can always shape he TQWT taller/narrower/deeper, it just means it won't couple as well to a near boundary, ergo may need BSC or more of it. Depending on the field coil's specs, it could be ideal for a narrow version of it.
GM
Anyway, a great way to dial in a system, especially a multi-way horn one, then use the data to improve it acoustically as much as practical, though even in this scenario, over sizing cabs/whatever is still desirable since it increases tuning flexibility.
As for dialing in subs, this has only become an issue fairly recently for most folks and I'm fortunate to have an acoustically open room, so not much of a issue for me except needing one up the wall a ways to deal with the floor/ceiling modes. Still, where folks can 'afford' the solution, multiple subs is the way to go, though with no experience with them in a relatively small room, don't know how much DSP will help except with placement.
Field coil, eh? Cool! Nothing like it for dialing in BSC.
Well, folks can always shape he TQWT taller/narrower/deeper, it just means it won't couple as well to a near boundary, ergo may need BSC or more of it. Depending on the field coil's specs, it could be ideal for a narrow version of it.
GM
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