Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 3 1 2 3
Re: Thoughts on integrating a different into the mix
Ken.C #341000 03/07/11 06:30 AM
Joined: Feb 2009
Posts: 3,466
connoisseur
Offline
connoisseur
Joined: Feb 2009
Posts: 3,466
It's a nine dimensional box. smile


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
Re: Thoughts on integrating a different into the mix
Ken.C #341081 03/08/11 01:04 AM
Joined: Apr 2008
Posts: 72
D
old hand
OP Offline
old hand
D
Joined: Apr 2008
Posts: 72
Originally Posted By: kcarlile
OK, I gotta ask... cf^3? I keep reading it as cubic foot to the third power, which doesn't make sense.

To be honest I'm not quite shore what ^3 means in regards to enclosure formulas in cf. That is how the owner of Steroe Integrity has presented the recommended enclosure size. When you look at adavaced enclosure design software, the formulas for calculating optimum speaker enclosures from small/theil parameters, is a series of complicated mathematical equations. This type of math is not my strong point. If anybody out their has experience in advanced enclosure design, please give your .2.


Demetrios
Re: Thoughts on integrating a different into the mix
demetman #341082 03/08/11 01:04 AM
Joined: May 2003
Posts: 18,044
shareholder in the making
Offline
shareholder in the making
Joined: May 2003
Posts: 18,044
I suspect that it is, in fact, a mistake.


I am the Doctor, and THIS... is my SPOON!
Re: Thoughts on integrating a different into the mix
Ken.C #341100 03/08/11 02:33 AM
Joined: Dec 2009
Posts: 311
devotee
Offline
devotee
Joined: Dec 2009
Posts: 311
I say just put some Axiom M80's in your car and be done with it! grin


"Art is making something out of nothing and selling it."
---Frank Zappa

Re: Thoughts on integrating a different into the mix
demetman #341104 03/08/11 02:51 AM
Joined: May 2002
Posts: 10,649
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,649
Demetrios, yes both the T/S parameter Vas and enclosure volume Vb are given simply in cu.ft., not cu.ft. cubed. You've probably seen the formula for calculating the resonant frequency of a driver with a free-air resonance Fs and an "equivalent volume" Vas in a closed box of a certain internal volume. Apparently here a small closed box with a internal volume of 3 cu. ft. is being proposed(about 49Hz).


-----------------------------------

Enjoy the music, not the equipment.


Re: Thoughts on integrating a different into the mix
JohnK #341146 03/08/11 06:34 AM
Joined: Apr 2008
Posts: 72
D
old hand
OP Offline
old hand
D
Joined: Apr 2008
Posts: 72
Thank you for your informative responce JohnK. Nothing ventured, nothing gained. I will be fabricating a 3.5cf ported enclosure tuned to 30Hz for the 15" Stereo Integrity subwoofer. I am able to borrow an amp from a buddy that's a sound teck for dance clubs and concert halls. I'd like to see if I can get the Ep5oo and the SI to blend well while playing full range. I'm sure it will be challanging and possibley yeild good results. Expect some build progress pictures to show up in the course of a couple weeks. I'll be checking back once I get the ball rolling. Thanks for any ideas


Demetrios
Re: Thoughts on integrating a different into the mix
demetman #341256 03/09/11 01:31 AM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
Can't wait to see some of the build as it happens. Good luck.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Re: Thoughts on integrating a different into the mix
jakewash #341319 03/09/11 04:45 AM
Joined: Apr 2008
Posts: 72
D
old hand
OP Offline
old hand
D
Joined: Apr 2008
Posts: 72
After questioning Nick Lemons, owner of Stereo Integrity of what the meaning of ^3 in reference to a 3.5^3 enclosure is...His responce was "the ^3 is mathematical shorthand for Cf or cubic foot. "It is commonly referenced this way in speaker enclosure design".

My buddy ran some numbers for various vent and port dimentions. Waiting on a responce from the manufacturer on port dimension recommendations. So far the best looking box utelizes a 2"x12" capped vent with box dimensions of 18"Hx22"W and a depth that depends on recommended vent type. I'm hoping to get this build finished within a week, time permitting.

I need to start looking at amplication for this sub. After researching the Dayton SA 1000 sub amp, I found that the amp barely puts out half of it's rated output. Any recommendations for amps delivering around 1000w rms into a 4 ohm load with an infrasonic filter? Keep in mind this is an experiment so budget is alo a key factor. Thanks


Demetrios
Re: Thoughts on integrating a different into the mix
demetman #341322 03/09/11 04:52 AM
Joined: Feb 2009
Posts: 3,466
connoisseur
Offline
connoisseur
Joined: Feb 2009
Posts: 3,466
The ^3 wasn't a problem. It was combining it with cf that was confusing. One should use ft^3, or cf, but not cf^3, which says "cubic feet cubed" (and why I said ninth dimensional).

The f^3 actually should be written as ft³ (³).


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
Re: Thoughts on integrating a different into the mix
demetman #341323 03/09/11 04:52 AM
Joined: May 2002
Posts: 10,649
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,649
Yes, Demetrios; feet cubed is correct, but not cubic feet cubed, which is what you were originally showing.


-----------------------------------

Enjoy the music, not the equipment.


Page 2 of 3 1 2 3

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,401
Posts432,369
Members15,420
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,437
SirQuack 13,690
CV 11,815
MarkSJohnson 11,451
Who's Online Now
2 members (CV, TrevorM), 242 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4