or Connect
AVS › AVS Forum › Audio › DIY Speakers and Subs › Stereo Integrity's new HT Subwoofer
New Posts  All Forums:Forum Nav:

Stereo Integrity's new HT Subwoofer - Page 15

post #421 of 2212
Oops, you're right. I was looking at the comparison graphs.

Gear mentioned in this thread:

post #422 of 2212
Quote:
Originally Posted by Gorilla83 View Post

Now you're thinking clearly. Twelve of these drivers would just be crazy. Although at that point you might as well just do 16 to gain the 'doubles' advantages - 2, 4, 8, 16. Do it.
Again, do it. biggrin.gifbiggrin.gif

Agreed.
post #423 of 2212
Quote:
Originally Posted by beastaudio View Post

Start there with Z's 15hz ported. I wouldnt go lower than than that. The 10hz tune would need more air space to smooth that out. try closer to 20cuft, LLT style for the 10hz model. That is getting to be a pretty large box!!
Once you have the funds to buy more, and more amp power, then you just double up and go sealed and you are all set smile.gif

Would the 10hz tune be possible if I had no restrictions on the enclosure size? How large is a 20^ft enclosure? Are there any other pro's or con's to doing a 10hz tune with this driver?
post #424 of 2212
Quote:
Originally Posted by beastaudio View Post

Nah, Stereo Integrity is housed in the same spot as Sundown Audio and Obsidian. They have a good little operation going. WiSounds has already spoken to the value of the zv3 in his setups and I saw some while I was there. Definitely no slouch. All the design guys are doing are going with a new direction for a more HT based subwoofer. The same "looking" subs are already in use, but they are not the same design!! The high roll surround is on the obsidian, but the compliance of the HT surround is MUCH MUCH better for HT use. Im telling you I tested the two side-by-side and even though they look the same, there is nothing similar other than that.
Just like any smaller/growing company, SI is giving enough time to gauge total preorders before they begin building out the drivers. So far, they are doing quite well with pre-orders and all the parts are set to be delivered right around now, if not already. Holiday shipping posed a bit of an issue, but now that things are slowing down, it should be all good. This first order quantity is quickly being ordered up and they are hoping to really hit it out of the park with the second parts order.
Even though the parts were not there yet, I got to see the preparatory measures they have taken, the individual parts of the driver being used, and the space available to really take this operation to the next level. I am looking forward to visit #2 here in the next two weeks where I will hopefully be scooping up my order while I am there. FWIW, I think the shipping starting end of December is that far off. If they ship orders as they assemble them, this should be just about right.
One is out of stock, one is currently being assembled. Which one you want to wait for is the question. Being local, I am shooting for the SI. Check you PM's brah biggrin.gif

Indeed -- Nick Lemons (SI and Obsidian) and I are good friends and we work together at our facility here in Troutman.

That being said... the SI HT woofers were just unloaded from the truck this morning smile.gif
post #425 of 2212
Quote:
Originally Posted by Martycool007 View Post

Would the 10hz tune be possible if I had no restrictions on the enclosure size? How large is a 20^ft enclosure? Are there any other pro's or con's to doing a 10hz tune with this driver?

20 cubic feet? I'd say just a wild guess.... the size of a dining room table....

if you were going for a tall cabinet, it could be 6'4 x 1'9 X 1'10....

or if you wanted a shorter one it could be 4' X 2'3 X 2'3

all are massive in size IMHO
post #426 of 2212
Quote:
Originally Posted by Martycool007 View Post

Would the 10hz tune be possible if I had no restrictions on the enclosure size? How large is a 20^ft enclosure? Are there any other pro's or con's to doing a 10hz tune with this driver?

If I understand it correctly, it may be difficult to tune the box this low with reasonable port velocity and high enough port resonant frequency.

Scott's LLT is 25cu.ft ( 24"wide, 45" tall", 50.5" deep) is tuned to 11hz.
That's probably as low as it is reasonable to go with 8 inch port if you cross the mains at 80Hz or lower. With higher crossover points the port resonant frequency may be an issue, you'd have to shorten the port and bump up the tuning even higher.

I am thinking a multitune box may be an option to consider. something along the lines this guy was doing with mach5 15 IXLs.
post #427 of 2212
Quote:
Originally Posted by Martycool007 View Post

How large is a 20^ft enclosure?

Enclosure Volume Calculators
post #428 of 2212
Quote:
Originally Posted by sundownz View Post

Indeed -- Nick Lemons (SI and Obsidian) and I are good friends and we work together at our facility here in Troutman.
That being said... the SI HT woofers were just unloaded from the truck this morning smile.gif

Prove it...

We like pictures.
post #429 of 2212
Quote:
Originally Posted by enterthedragon View Post

Prove it...
We like pictures.

I spoke to Nick on the phone and he mirrored this statement. Drivers are there smile.gif Even though I consider myself relatively local, I am not going to drive 2 hours to take a pic for you biggrin.gif
post #430 of 2212
Quote:
Originally Posted by Martycool007 View Post

Would the 10hz tune be possible if I had no restrictions on the enclosure size? How large is a 20^ft enclosure? Are there any other pro's or con's to doing a 10hz tune with this driver?

Lol, look at the post after the one you replied to here.

Quote:
Originally Posted by zheka View Post

If I understand it correctly, it may be difficult to tune the box this low with reasonable port velocity and high enough port resonant frequency.
Scott's LLT is 25cu.ft ( 24"wide, 45" tall", 50.5" deep) is tuned to 11hz.
That's probably as low as it is reasonable to go with 8 inch port if you cross the mains at 80Hz or lower. With higher crossover points the port resonant frequency may be an issue, you'd have to shorten the port and bump up the tuning even higher.
I am thinking a multitune box may be an option to consider. something along the lines this guy was doing with mach5 15 IXLs.

Exactly. There wasn't any gains going from 11hz to 10hz on the tune but it meant going with an 8" port that was way too long and introduced a port resonance that is getting close to the LFE bandwidth.

If size isn't any issue, copy my subs. You'll be hard pressed to get more performance in a subwoofer system save for a multi-driver multi-kilowatt mega sealed system.
post #431 of 2212
Quote:
Originally Posted by enterthedragon View Post

Prove it...
We like pictures.


** In packaging


** QC Testing

Nick put those up online earlier along with a few others.
post #432 of 2212
Yeah baby!!!!
post #433 of 2212
Quote:
Originally Posted by sundownz View Post


** In packaging

** QC Testing
Nick put those up online earlier along with a few others.

I think that one there is mine! biggrin.gif
post #434 of 2212
I hope four if those puppies are heading to Canton, MI smile.gif
post #435 of 2212
D2 or D4 for a single on an EP4000?
post #436 of 2212
Packaging done right!
post #437 of 2212
"Jacob Fuller of Sundown Audio sent AARON SMITH of AARON SMITH 8 FedEx Home Delivery package(s)."

We have liftoff!
post #438 of 2212
Woot!
post #439 of 2212
Sep
Quote:
Originally Posted by d_c View Post

D2 or D4 for a single on an EP4000?[/quo

Depends on your upgrade plans.
post #440 of 2212
We have no plans for an upgrade to an additional sub for this project. I only get to use one!
post #441 of 2212
How many drivers are you getting?
post #442 of 2212
Quote:
Originally Posted by d_c View Post

We have no plans for an upgrade to an additional sub for this project. I only get to use one!

Sealed or ported? I'm assuming sealed. I'm thinking the D4 so you can wire it as 2 ohms and use one channel.
post #443 of 2212
Quote:
Originally Posted by zheka View Post

If I understand it correctly, it may be difficult to tune the box this low with reasonable port velocity and high enough port resonant frequency.
Scott's LLT is 25cu.ft ( 24"wide, 45" tall", 50.5" deep) is tuned to 11hz.
That's probably as low as it is reasonable to go with 8 inch port if you cross the mains at 80Hz or lower. With higher crossover points the port resonant frequency may be an issue, you'd have to shorten the port and bump up the tuning even higher.
I am thinking a multitune box may be an option to consider. something along the lines this guy was doing with mach5 15 IXLs.
that sub never seen the light of day. got an objection from the missus.

these, however, was built:



multiple tuning is indeed a viable option, just that not widely adopted. i built the slot ported to test if i could hear any port noise at 35m/s airspeed at maximum level that i could tolerate.
turned out i can't. so the next builds are designed with a max of 35m/s at max excursion.

ditched the slot port because they're a pain to construct. with a smaller port you're able to get longer length. thus higher port resonance. just set a maximum acceptable port airspeed to you and work so that the airspeed doesn't go over that while keeping with a smaller port.
post #444 of 2212
@Brian
Yes, sealed. I was thinking backwards adding up Ohms. I want two 4 ohm coils run series for 2 ohms bridged at the amp to run it most efficiently, right? The D2 would give me 1 ohm, which I don't think the amp could handle.

@Scott
We ordered one driver for a sealed project for my parents, which is WAY more than I thought they would accept. I ordered the D2 and then had an oh crap moment when I realized what I did.

edit - series would be 2+2 for 4 ohms at the amp. my brain is fried...
Edited by d_c - 12/28/12 at 3:55pm
post #445 of 2212
Quote:
Originally Posted by brian6751 View Post

Sealed or ported? I'm assuming sealed. I'm thinking the D4 so you can wire it as 2 ohms and use one channel.

Quote:
Originally Posted by d_c View Post

We ordered one driver for a sealed project for my parents, which is WAY more than I thought they would accept. I ordered the D2 and then had an oh crap moment and want to make sure this would be right for an EP4000.

Asssuming the amp is 2ohm stable, that is not a bad idea, but if it isn't, BOOM goes the dynamite!
post #446 of 2212
It will work just fine. You could hook up a single d2 to a channel for about 600w total or hook up each coil to the amp for 1,600w. biggrin.gif
post #447 of 2212
which wont hurt, not sure about whether or not they rewired that amp in the pic at the testing station, but when I was there it was capable of about 3500 watts and was pushing another prototype about 6 inches p2p biggrin.gifeek.gif
post #448 of 2212
also, is there a group that meets to handle addictions to speaker pron?
post #449 of 2212
Quote:
Originally Posted by paskal9 View Post

that sub never seen the light of day. got an objection from the missus.
these, however, was built:


multiple tuning is indeed a viable option, just that not widely adopted. i built the slot ported to test if i could hear any port noise at 35m/s airspeed at maximum level that i could tolerate.
turned out i can't. so the next builds are designed with a max of 35m/s at max excursion.
ditched the slot port because they're a pain to construct. with a smaller port you're able to get longer length. thus higher port resonance. just set a maximum acceptable port airspeed to you and work so that the airspeed doesn't go over that while keeping with a smaller port.

interesting. i was trying to model something along the lines but could not keep the first resonance fq high enough. does not it actually go down when the length of the port is increased?
Edited by zheka - 12/28/12 at 8:50pm
post #450 of 2212
Quote:
Originally Posted by Aaron Smith View Post

"Jacob Fuller of Sundown Audio sent AARON SMITH of AARON SMITH 8 FedEx Home Delivery package(s)."
We have liftoff!

Freaking awesome. Wait, what???? Where's my email? tongue.gif
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: DIY Speakers and Subs

Gear mentioned in this thread:

AVS › AVS Forum › Audio › DIY Speakers and Subs › Stereo Integrity's new HT Subwoofer