I think its amazing that we spend so much time and effort trying to reproduce what an OB or IB does. MY belief, for a livable system a two way with the lower being supplied by a proper sealed or BR with either OB or IB or a combo at a higher frequency,all time alingned. Add a tweet if you can hear that high, add a sub if you want lower.
ron
ron
Hi GM,
Can you please calculate dim for this driver?
info was c&p from zillaspeak.com (I hope he does not mind):
"Audio Nirvana Super 8
L = (Line length) 180"
Zdriver = Driver 36" down from sealed end of cabinet
Sm = 168"^2 "
Thank you
Can you please calculate dim for this driver?
info was c&p from zillaspeak.com (I hope he does not mind):
"Audio Nirvana Super 8
L = (Line length) 180"
Zdriver = Driver 36" down from sealed end of cabinet
Sm = 168"^2 "
Thank you
Scottmoose said:
I read this last night and went out and got it today.. Great playing, they copied my version of Stairway to Heaven however😡 (not)...... I love that their background is Metal as that's what mine is, and it's nice to hear how one can move on and grow with that foundation.... I was able to copy the tune that play's over and over in the menu section on the dvd with my electric guitar and picked up a few other riffs. This is a style of music I'd really like to learn, great stuff... Thanks Scott...... Dave🙂
tobebu02 said:
Greets!
Calculate what? Anyway, I posted/explained an example for you (and others) so ya'll could do your own. 😉
GM
Cabinet for AN Super8
hi GM and everyone,
I got it. Cabinet dimension:
H 90"
D 15.5"
W 10.9"
a-b-c 7.7"
Can i make it a little bit bigger:
H 90"
D 16"
W 11"
a-b-c 8"
will it OK?
Thanks.
tobebu02 said:
hi GM and everyone,
I got it. Cabinet dimension:
H 90"
D 15.5"
W 10.9"
a-b-c 7.7"
Can i make it a little bit bigger:
H 90"
D 16"
W 11"
a-b-c 8"
will it OK?
Thanks.
Should be fine. Pipe horns are not about forensic precision, and a touch more volume won't be much of an issue -you can always damp it down a bit if necessary.
Re: Cabinet for AN Super8
Greets!
While my preference is to use the posted formula's SQRT(2) ratio, or ~15.56" deep for 11" wide, the original BIB has a higher aspect ratio and performs well, so this is fine and increasing a horn's Vb is rarely a problem. Indeed if you 'did the math', then you know the formula calcs ~191.03"^2, so your 176"^2 will work fine and if you're going to drive it with a high output impedance, then it should be even larger IMO.
That said, I hadn't noticed before, but with a single fold the driver is going to be ~55" off the floor, well above the optimum seated height range for a FR driver, so you might want to consider the stock length pipe, which of course doesn't go as low before rolling off.
GM
tobebu02 said:
Greets!
While my preference is to use the posted formula's SQRT(2) ratio, or ~15.56" deep for 11" wide, the original BIB has a higher aspect ratio and performs well, so this is fine and increasing a horn's Vb is rarely a problem. Indeed if you 'did the math', then you know the formula calcs ~191.03"^2, so your 176"^2 will work fine and if you're going to drive it with a high output impedance, then it should be even larger IMO.
That said, I hadn't noticed before, but with a single fold the driver is going to be ~55" off the floor, well above the optimum seated height range for a FR driver, so you might want to consider the stock length pipe, which of course doesn't go as low before rolling off.
GM
Attachments
You are right. I'll have the driver at seated height level at 30" to 36" from the floor.
Thank you
Thank you
Huh?! Do you mean you're going to keep the 90" height, but drop the driver down to suit? If you do, there will be a big suck-out in the mid-bass that I don't believe the room can overcome. Unfortunately, only one way to know for sure.
Cabinet for AN Super8
As you can see, I'm still in the dark here. How can I reduce the height, what factors should I look for? Has anyone ever built your BIB cabinet with this driver? please advise. I'm still new at this and still have a lot to learn.
Thank you
As you can see, I'm still in the dark here. How can I reduce the height, what factors should I look for? Has anyone ever built your BIB cabinet with this driver? please advise. I'm still new at this and still have a lot to learn.
Thank you
Re: Cabinet for AN Super8
Greets!
You're welcome!
Understood, many who come to this thread are, but I respond with the assumption that some attempt has been made to get 'up to speed' on BIBs, especially after they've been directed to the official BIB site where the basic design is explained as well as a link to TC's original that I referred WRT the 'stock' length pipe: http://melhuish.org/audio/DIYTQ8.html
Anyway, as Scott noted, these simple pipe horns are pretty tolerant as vented speaker designs go, but there's limits and driver placement is more critical with these than a basic bass reflex.
AFAIK, Scott did the Super 8 design shown on Godzilla's site and I don't recall whether anyone has actually built it. What I do know is that once 'Sm' is calc'd, the line length 'L' only determines how low it will play, so you can use your width, depth, a-b-c dims with the original's 69" internal height and driver down 30". This is the sim I posted.
Obviously, this puts the driver higher than you're planning, but FWIW a number of us have found that positioning the main driver above our ear level a bit sounds better than at or below it. Again though, pushing the driver down to 30" even with this shorter pipe yields too big a hole in the response for the room to mask IMO:
GM
Greets!
You're welcome!
Understood, many who come to this thread are, but I respond with the assumption that some attempt has been made to get 'up to speed' on BIBs, especially after they've been directed to the official BIB site where the basic design is explained as well as a link to TC's original that I referred WRT the 'stock' length pipe: http://melhuish.org/audio/DIYTQ8.html
Anyway, as Scott noted, these simple pipe horns are pretty tolerant as vented speaker designs go, but there's limits and driver placement is more critical with these than a basic bass reflex.
AFAIK, Scott did the Super 8 design shown on Godzilla's site and I don't recall whether anyone has actually built it. What I do know is that once 'Sm' is calc'd, the line length 'L' only determines how low it will play, so you can use your width, depth, a-b-c dims with the original's 69" internal height and driver down 30". This is the sim I posted.
Obviously, this puts the driver higher than you're planning, but FWIW a number of us have found that positioning the main driver above our ear level a bit sounds better than at or below it. Again though, pushing the driver down to 30" even with this shorter pipe yields too big a hole in the response for the room to mask IMO:
GM
Attachments
Thank you GM,
You are very helpfull and have been very patient with me on the subject. I'll try the height as you recommended to see if it works out.
Thank you
You are very helpfull and have been very patient with me on the subject. I'll try the height as you recommended to see if it works out.
Thank you
tobebu02 said:
I've played with driver height a bit and I find that putting the driver around 45" expands the sound stage vertically, but leaves it centered at eye level. I don't do this with my commercial designs because this makes the cabinet too tall to pass the WAF test. But since you are committed to a very tall cabinet anyway, moving the driver up to 45" gets it closer to optimum and will give better presentation to boot.
Bob
You're welcome.
Bob, out of a spirit of curiosity, is that one of the reasons you reduced the height of your MK2 FT1600 over the MK1?
Bob, out of a spirit of curiosity, is that one of the reasons you reduced the height of your MK2 FT1600 over the MK1?
Scottmoose said:
The height was reduced and the slot port changed to a circular port to reduce some wiggles above 100 Hz. As I said above, cabinet height is a serious consideration to most of my customers, so reducing the overall height 2" was perceived as a good thing.
FYI, I'll looking at a MKII of the LT-2000 -- the Lowther DX2 MLTL -- with the intention of rounding out the bass roll-off a bit. Not that the bass on the LT-2000 is any way bad, I just think that I can move the emphasis up a bit which will help with the somewhat weak dynamics that any MLTL has.
Bob
Interesting. Thanks Bob. Re the 2000s, sounds like a good plan to me -I'll be interested to hear about your impressions once the mods are done.
Re: CSS SD12 Subduction
sorry to invade... I'm a nOOb with BIBs... would this TC Sounds db-500 12" subwoofer driver yield decent results in a BIB configuration (thinking about an LLT enclosure)
http://www.tcsounds.com/db500.htm
T/S
12" dB-500 SVC
Qts 0.447
Qes 0.481
Qms 6.347
Fs 24Hz
Res 3.25Ù
Ls 2.36
Lp 3.51
Rp 2.91Ù
Dia 241mm
Vas 71.5l
mms 169g
cms 244um/M
bl 13.3Tm
Spl 86dB
planet10 said:
sorry to invade... I'm a nOOb with BIBs... would this TC Sounds db-500 12" subwoofer driver yield decent results in a BIB configuration (thinking about an LLT enclosure)
http://www.tcsounds.com/db500.htm
T/S
12" dB-500 SVC
Qts 0.447
Qes 0.481
Qms 6.347
Fs 24Hz
Res 3.25Ù
Ls 2.36
Lp 3.51
Rp 2.91Ù
Dia 241mm
Vas 71.5l
mms 169g
cms 244um/M
bl 13.3Tm
Spl 86dB