or Connect
AVS › AVS Forum › Audio › DIY Speakers and Subs › New build for dedicated 3600 cu ft theater. Two RSS390HF's? Four? Sealed/Ported?
New Posts  All Forums:Forum Nav:

New build for dedicated 3600 cu ft theater. Two RSS390HF's? Four? Sealed/Ported? - Page 2

post #31 of 80
Thread Starter 
Quote:
Originally Posted by Mrkazador View Post


That is what I get....

X1 HF - 400w
x1 HO- 500w

Both have a 20hz highpass and right at xmax.

Cool, I'm just learning WinISD. I also plugged in a 4th order butterworth low-pass at 80Hz. I didn't think to check Xmax until now! You're right it looks like 400/500W is the max! Thanks!
post #32 of 80
Thread Starter 
Quote:
Originally Posted by LTD02 View Post

Dude, just put in an iNuke 3000 DSP and four RSS390HO's in ~5 cubes ea. tuned to 20hz, one per corner. ;-)
the dsp can be used to limit the drivers from becoming undone below tuning.
that should get you over 120db for under $1k from 20hz up, smooth out a lot of room effects, but the main problem is that you might need a 5 minute, $10 fan mod. :-)~

You recommend the HO's over the HF's?
post #33 of 80
in 5 cubit feet tuned to 20hz, the strong motor of the -ho works a little better (red) than the -hf (gray). both at 500 watts.

post #34 of 80
Thread Starter 
... well they're cheaper too!
post #35 of 80
LTD Convinced me to go with the HO's I hear nothing but good things about them in reviews and everywhere I read. I have a THT now and I was scared that the 2 HF wouldn't be able to keep up with the THT, so I wanted to make sure I went big instead of going home. The only thing I was concerned about was for music, but people say they sound great for music and I can't find anything that says the HF sounds noticeably better than the HO's. One post I found someone said the HF sounded better but it was so close they made it seems as though the diff wasn't enough to really worry about it.

I was so confused as to which to buy, I literally pressed the buy button at 4:00 PM EST to make sure I got them tomorrow. I was hovering over the buy now, thinking, Power and loudness, extension or clarity, would I notice a diff, but one requires a bigger cab, but it sounds better, but the other one is cheaper. But LTD told me many people use them and are happy, so I'm sure I'll be happy with my HOe's.

Plus I have an EP2500 and an EQ so I think I can feed them the power and curve they desire.
post #36 of 80
Thread Starter 
Quote:
Originally Posted by Evolvo View Post

LTD Convinced me to go with the HO's I hear nothing but good things about them in reviews and everywhere I read. I have a THT now and I was scared that the 2 HF wouldn't be able to keep up with the THT, so I wanted to make sure I went big instead of going home. The only thing I was concerned about was for music, but people say they sound great for music and I can't find anything that says the HF sounds noticeably better than the HO's. One post I found someone said the HF sounded better but it was so close they made it seems as though the diff wasn't enough to really worry about it.
I was so confused as to which to buy, I literally pressed the buy button at 4:00 PM EST to make sure I got them tomorrow. I was hovering over the buy now, thinking, Power and loudness, extension or clarity, would I notice a diff, but one requires a bigger cab, but it sounds better, but the other one is cheaper. But LTD told me many people use them and are happy, so I'm sure I'll be happy with my HOe's.
Plus I have an EP2500 and an EQ so I think I can feed them the power and curve they desire.

Thanks for sharing! I'm leaning towards the HO's too now, especially considering my ratio of music to movies. The smaller cabinet and price issue are in favor of the HO. This seems like one of the least expensive routes to a quad sub system.
post #37 of 80
Thread Starter 
Has everyone see the eyeball video with the four 18's and 23k watts?

http://www.youtube.com/watch?v=N1B-mQlQGFk

This guy is from my city...
post #38 of 80
Thread Starter 
WinISD question... If I'm at one port I get a port length of 14.1 inches. Then I go to two ports and get 31.1 inches, does that mean that the 2 port design length is 31.1 inches per port, or 31.1 inches total length and each port would be about 15.55 inches?
post #39 of 80
"WinISD question... If I'm at one port I get a port length of 14.1 inches. Then I go to two ports and get 31.1 inches, does that mean that the 2 port design length is 31.1 inches per port, or 31.1 inches total length and each port would be about 15.55 inches?"

2 ports 31 inches.

technically, if you double the ports, you have to double the length of each port for the same tuning. i'm not sure why you are getting 31 inches instead of 14.1*2 = 28.4 inches, but that is the right ball park.
post #40 of 80
Thread Starter 
Quote:
Originally Posted by LTD02 View Post

"WinISD question... If I'm at one port I get a port length of 14.1 inches. Then I go to two ports and get 31.1 inches, does that mean that the 2 port design length is 31.1 inches per port, or 31.1 inches total length and each port would be about 15.55 inches?"
2 ports 31 inches.
technically, if you double the ports, you have to double the length of each port for the same tuning. i'm not sure why you are getting 31 inches instead of 14.1*2 = 28.4 inches, but that is the right ball park.

Maybe its because I have an "end correction" of .732 inches, which I was thinking was the actual thickness of 3/4" mdf. I saw your post on "flared" ends so I'm considering that. My velocity with two ports is between 18 and 19 m/s.

In order to keep that from skyrocketing, I find I have to do 2 ports. kind of a shame because they take up so much more volume! I'm finding that a larger diameter isn't necessarily the solution either.
post #41 of 80
don't fret over big flares and ports...

just remember that you are attempting to recreate frequencies at spl levels that would otherwise require something like this:

post #42 of 80
Thread Starter 
I was looking at these port flares and the only good question, whether or not they'll interface properly with the 4" abs pipe I have at home, was met with a sarcastic response so I'm not sure if they're worth the $13 or not... I'm thinking of just foregoing the flare altogether.

http://www.parts-express.com/pe/showdetl.cfm?partnumber=268-330

To me it might be worth it to use them for the aesthetics on the outside of the box if they couple to 4" abs sewer pipe.
post #43 of 80
"The OD of where the flare meets the tube is 4-1/4"."

sounds 4.25" is what you need on the inside of your pipe to slide these flares into it.

this site shows the inside diameter for abs drain pipe that is nominal 4" is 4.033"

http://www.engineeringtoolbox.com/ABS-drainage-pipe-d_1732.html

that suggests that it won't work, but it would be kind of odd to offer an abs flare that does not match to abs pipe.
post #44 of 80
Quote:
Originally Posted by AI Limited View Post

I'm in my early 40's and don't think I can hear below 50Hz... but maybe with the right subs?

I didn't see anyone else comment on this, so I am assuming this was a joke? With the right subs you should be able to "hear" down to 15Hz (I guess that is debatable depending on how good your hearing actually is) and "feel" below that. If this was not a joke and you simply haven't experienced capable subs with significant output below 50Hz, then you are in for a real treat!

Quote:
Originally Posted by AI Limited View Post

Has everyone see the eyeball video with the four 18's and 23k watts?
http://www.youtube.com/watch?v=N1B-mQlQGFk
This guy is from my city...

Steve Meade... One of the most famous Car Audio guys that I know of. When I used to follow his career back in the day I was under the impression that he was having his own sub designed. I'm not sure what ever became of it. His car audio videos are what I have always wanted to emulate in my HT at some point in time...

I eventually evolved my passion from Car to Home Audio/Theater overtime.
post #45 of 80
Thread Starter 
True. Also, if you do the math from the numbers provided at the link you posted:

4" nominal is 4.507" OD - 0.237" wall thickness does not equal 4.033". In fact, 4.507-.237 = 4.27" which may actually work. I'm finding different size pipe measurements on the web though. I'll have to go measure mine!
post #46 of 80
Thread Starter 
Quote:
Originally Posted by enterthedragon View Post

I didn't see anyone else comment on this, so I am assuming this was a joke? With the right subs you should be able to "hear" down to 15Hz (I guess that is debatable depending on how good your hearing actually is) and "feel" below that. If this was not a joke and you simply haven't experienced capable subs with significant output below 50Hz, then you are in for a real treat!
Steve Meade... One of the most famous Car Audio guys that I know of. When I used to follow his career back in the day I was under the impression that he was having his own sub designed. I'm not sure what ever became of it. His car audio videos are what I have always wanted to emulate in my HT at some point in time...
I eventually evolved my passion from Car to Home Audio/Theater overtime.

I was being serious about the hearing below 50 Hz. Must've been my crappy sub experience! Lol... hard to tell when I'm joking/serious sometimes cause I'm always having fun!!!

Yes, Steve Meade. He's local and makes and/or has made for him FI subs.
post #47 of 80
Thread Starter 
I ordered my subs. I also purchased my wood. My wife said I had to build our pantry before I could build my subs, so I am going to do it all at the same time. After working with the guy at Lowe's, I got most of my cuts done for free and they were fairly precise! That saved me a lot of work and cleanup!
post #48 of 80
Awesome news AI! Definitely tuned in. smile.gif
post #49 of 80
Hey AI check out my build Thread. It might help with ur build. My subs turned out great.

http://www.avsforum.com/t/1437195/my-dual-15-dayton-ho-how-should-i-build-it-thread
post #50 of 80
Thread Starter 
I've been watching! Glad you're happy with the results!
post #51 of 80
Quote:
Originally Posted by fbov View Post

Check your data. HF and HO have the same sensitivity, but the HF digs deeper while the HO takes more power. The fact that your green curve extends lower in frequency indicates its the HF. If that's the case, then the difference is due to modeling at rated power, so the added 300W to the HO predicts a 2.5dB greater output, which is what you show. Model it at equal power and you should only see a difference in extension.
HAve fun,
Frank
Quote:
Originally Posted by LTD02 View Post

in 5 cubit feet tuned to 20hz, the strong motor of the -ho works a little better (red) than the -hf (gray). both at 500 watts.

My mistake. I missed the part about same-size boxes, an even stronger driver (pardon the pun) of LF response. Just put the HF in a 3x larger box, and everything lines up like it should.
- greater extension from the HF

- greater output from the HO (due to greater power applied).


Note that both drivers are yielding similar response curves, indicating that both are working in appropriate volumes. Shifts up/down and left/right are due to power handling and Fs, as expected. The comparison plots show HF in a small box, and HO with an EBS alignment as a result of common box parameters for two very different drivers.

Have fun,
frank
post #52 of 80
Thread Starter 
Ya I just about fell off my chair when I looked at the box size recommendation for the HF. A strike against it considering the WAF is important to me (and her).
post #53 of 80
Thread Starter 
Ok so I have my drivers and my wood. I'm about to start assembly. I was just curious on my amp selection. I was leaning towards an iNuke3000DSP until I read that they don't have a 12v trigger (lame). What are my other options in the same price range? I need the high-pass filter and about the same power.
post #54 of 80
"I was leaning towards an iNuke3000DSP until I read that they don't have a 12v trigger (lame)."

yeah, it wasn't designed for home subwoofer applications. it is a pro audio amp where 12v triggers are not used.

a while back noah k. posted a device from sears that switches power based on the signal to another line.

it was pretty inexpensive, i'll see if i can find it.

couldn't dig it up.

edit: ah, here it is. not sure if it is still available:
http://www.avsforum.com/t/1263354/switched-outlet-for-20

if you don't need more than 15 amps, this might work too.

http://www.amazon.com/Smart-Strip-LCG3-Autoswitching-Technology/dp/B0006PUDQK

when you turn on power in the 'control', power will then be switched on to the some of the other outlets.
Edited by LTD02 - 11/14/12 at 11:45am
post #55 of 80
Thread Starter 
Thanks, that makes life easier! I have dedicated 20 amp circuits run to those racks but I can always daisy chain the switched outlet from the 20 amp distribution.
post #56 of 80
Quote:
Originally Posted by enterthedragon View Post

I didn't see anyone else comment on this, so I am assuming this was a joke? With the right subs you should be able to "hear" down to 15Hz (I guess that is debatable depending on how good your hearing actually is) and "feel" below that. If this was not a joke and you simply haven't experienced capable subs with significant output below 50Hz, then you are in for a real treat!
Steve Meade... One of the most famous Car Audio guys that I know of. When I used to follow his career back in the day I was under the impression that he was having his own sub designed. I'm not sure what ever became of it. His car audio videos are what I have always wanted to emulate in my HT at some point in time...
I eventually evolved my passion from Car to Home Audio/Theater overtime.

He did get them built. Pretty crazy design, the SMD's:

http://www.wccaraudio.com/ascendant-audio-smd-series-18-inch-dual-2-coils.html

IN action:

http://www.youtube.com/watch?v=ahPOOWw3ycc
post #57 of 80
Thread Starter 
Not the most attractive design. I guess they work. My goal isn't SPL though... at least not excessive SPL. I'd like to hear past the age of 50, though it may be a little late for that.
post #58 of 80
Thread Starter 





post #59 of 80
Thread Starter 

post #60 of 80
Awesome progress!!! Looking forward to the updates! What was your final design for these?
Edited by beastaudio - 11/19/12 at 8:03am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: DIY Speakers and Subs
AVS › AVS Forum › Audio › DIY Speakers and Subs › New build for dedicated 3600 cu ft theater. Two RSS390HF's? Four? Sealed/Ported?