NBPK402
-
Posts
2895 -
Joined
-
Last visited
-
Days Won
5
Content Type
Forums
Events
Gallery
Posts posted by NBPK402
-
-
My friend emailed them but they have not responded... I am assuming they are gone already.
-
1
-
-
Did he get them?
I just sent him a PM to see if he got them.
-
I just let someone know who lives 1 1/2 hours away... He is going to try and get them.
-
Ok... Now I understand. The ones he is using are 13.8cf x10=138cf, which means he is doing x6 with 8 of them.
-
I am confused now... I saw this guy on another forum running 8 FiCar IB3-18 woofers with a 300cf room. Here is his graph.
http://s191.photobucket.com/user/spinefixr/media/c-weightwithnocalfiles.jpg.html
What is the advantage to running a bigger room behind the drivers... Efficiency?
After you hit the 10 x Vas threshold, there's no advantage. You just want to be sure the drivers are in free air.
But the FiCar IB3-18 woofers have a VAS of 381 for one driver... Am I missing something here?
-
I am confused now... I saw this guy on another forum running 8 FiCar IB3-18 woofers with a 300cf room. Here is his graph.
http://s191.photobucket.com/user/spinefixr/media/c-weightwithnocalfiles.jpg.html
What is the advantage to running a bigger room behind the drivers... Efficiency?
-
Looks like a sweet deal for someone!
-
There are a ton of the TDA7297 chip amps on eBay right now for around $5.
Would this be a good chip for doing a 11 channel home theater with LA Scalas, KP 3002, and Heresy HIPs? What are the speaker cable limitations?
-
What is the difference between the D amp and the t amp? Do they both sound the same... Is it efficiency, size?
-
I have two KV3 Center channel speakers. Can these be used together somehow in a 5.1 or 7.1 setup and if so, how to wire them? Thanks for any help.
I'm not familiar with the KV3, and thought these were purely Bluetooth only. But if you can hardwire them, then yes, absolutely you can run dual KV3 centers.... this assumes your amp can handle the impedance drop for that channel.
At one time, I ran dual Cornwall center channels (connected in parallel), and if it weren't for the space premium they consumed, I'd still be running them today in my new home. Makes a for one hell of a front stage.
Dual centers... one above the screen and one below. That is how I did mine years ago, and it worked much better than one in my opinion. You just angle the top one down toward the listening position... This is the next best thing to having a center behind your screen.
-
A 4 driver IB in that space will be plenty, possibly scary. For reference, my living room is 20 x 21. The walls end at 8' and taper up to 12 in the center'. There are 3 openings in the room. I've hit 110 dB @ 10Hz and 120 dB @ 20 Hz measured 14' from the drivers.
How much power did you need for your subs to hit that level?
-
I went and re measured and I came up with these dimensions 16' wide, 23' 4" long, and 9' ceiling... The ceiling will end up at 8' due to the new ceiling and sub floor. The The room will end up at approximately 22' 10" long, 15' wide after walls are included into the equation.... Which will put it at close to 3000cf.
The area behind the screen will be 19' wide, 5' deep, and 8' tall... So we will have around 700cf after accounting for the speaker boxes.
-
600 cubic ft would be fine.
IB sub drivers reach their mechanical limits WAY before they reach their thermal limits so all you can do is look at the driver specs and see how much wattage you need to drive them. How big will the finished room be? Will it be sealed or have openings?
Both rooms will be sealed... The Theater room will be around 14' wide x 20' long with a 8' ceiling. I have not finalized the dimensions as of yet... We will be building a double 2x4 wall within the 2 car garage.
-
If I calculated correctly... I would have about 60 cubic feet less after accounting for the speaker boxes. So that would still be enough... Correct?
How do I figure out how much power it would take to hit 115db @10-15hz?
-
In the space though will be 3 La Scalas and 2 Heresy HIPs.
I glossed over this. Will this be subtracted from the 5'x8'x17' figure?
Yes
-
The space behind the screen will be 4-5' deep, 8' tall, and 17' wide. In the space though will be 3 La Scalas and 2 Heresy HIPs. If I do the IB route I will seal off the screen wall and build boxes for the front 5 speakers to sit in.
-
Would the space behind the screen be big enough? I just found this on the net and thought I could build this and extend the horn opening...
Would the IB be efficient enough to get the job done?
-
I am going to be building a Home Theater out of our 2 car garage soon, and I am thinking of building a new sub. This is what I am thinking of:
1. Build out the garage wall 5' deeper, and 17' wide with a 8' ceiling (garage door will become a screen wall with my 3 La Scalas and 2 Heresy HIPs behind a AT screen).
2: The garage and new room will be double wall constructed with 1 layer of OSB, 2-3 layers of sheet rock with Green Glue. The ceiling is currently 9' and will have about a 6" thick additional ceiling due to 3 layers of sheet rock and Green Glue.
What I am thinking of doing is using the whole addition room for a IB type sub but make the exit point of the box into a horn. I would build boxes that would enclose the 5 front speakers and seal them into the front wall. The front wall would only have a hole in it for the sub/horn to exit the room, and the AT screen would conceal the whole affair. I currently have the PSA Triax sub and it is great. I figure when I move to the larger room I will need more subs and I would like to have a sub that will give me the low frequency performance of the Triax (or better) without using a 4000w continuous 8000w peak amp (x2 if I have 2). I would like to be able to do it with a single amp of under 500w if that is possible.
I was looking at building dual Gjallarhorns, but I am thinking that this might be easier to build and give me the same performance.
-
Can a mod please close the thread then?
-
Annoying to have to look through another thread for what used to be listed individually in alerts.
You guys work for the government "streamlining" their processes?
I started it because Craigslist stuff goes very fast and if you know something was on Craigslist it would be easier IMO to find... Plus it keeps the down the thread count that you have to look through to find it.
-
I don't know anything about JBL horns...
Is this a good deal? Would the horns on here be similar to a Jubscala?
JBL PEAVEY SP1 - $500 -
Watched the BD release of Kurosawa's Runaway Train
I remember watching it when it was on laserdisc... It was a very good movie as I recall.
-
Do you need ir to control or does your equipment support rs232 or lan control? If you don't need ir you can use Home Automation software from several companies to control from your phone. One that I used years ago was Girder which is very inexpensive and might do what you need to do. http://www.promixis.com/girder.php
-
Have you thought about using something like iRule? http://www.iruleathome.com/irule-for-diy-enthusiasts
DIY sub
in Subwoofers
Posted · Edited by ellisr63
I am torn between doing the IB setup and going horn loaded... I have seen the TubaHT and the THSPUD... Both look like they would be easy enough for me to build and less expensive than the IB setup. The more I look the more confused I am. The Tuba HD looks like it would do everything I want at a low power just like I want but when I look online I hear that the IB will go lower and louder with the same power... But then I see how much power the IB will need and how much the horn loaded will need and it seems the tuned horn is the winner.
Can someone explain to me why I would want to go with either of these setups? I would like to hit reference levels (HT) with 400w or less @15hz or lower.