Dual Polk Audio Sr124 enclosure recomendation?

I have two SR124 subs and I had them in a 1.0 cu.ft. enclosure and they were loud even setting off my first car alarm but it wasn't enough. I want them to hit lower and harder. I am guessing I should go with a low tuned ported box. I checked the Sub box info section and it gives you basic dimensions but it doesn't tell me the tuning frequency, if it is a slot port or square, where to put the port. So if anyone has any suggestion that would be good.
System:
Pioneer 5900iB cd player w/ iPod hookup
Jl Audio XR650 components
Jl Audio XR650 rear coaxials
JBL GTO 75.4 at 100rms x 4
2 Polk Sr124 subs
Rockford Fosgate t1500bd
System:
Pioneer 5900iB cd player w/ iPod hookup
Jl Audio XR650 components
Jl Audio XR650 rear coaxials
JBL GTO 75.4 at 100rms x 4
2 Polk Sr124 subs
Rockford Fosgate t1500bd
Post edited by moreyb22 on
Comments
If you want more impact than a pair of powerhouse 12's and 1500 watts can deliver, youre going to have to move up to an SPL sub, bu another SR12 or get a 2000 watt amp.
MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st
polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
I built a 3/4" MDF, Dual Sealed for my SR124 DVC's. I went with the 1.2 final volume for each side, (1.4 before displacement). Each is being pushed by a Polk 500 monoblock at 2 ohm each. I was not at all happy with how hard they hit. Maybe more power would have made a difference. I ended up having to go smaller on my enclosure and ended up with 1.06 final in order to get them to hit nearly as hard as my MM12 subs at 2 ohm on a single 500.1.
EDIT:
Enclosure info for ya:
2 cubic feet NET volume
4" vent 20" long (tunes to 27Hz)
or
2.5 cubic feet NET volume
5" vent 20" long (tunes to 30HZ)
Those are just two random box volumes, but they model up great. You are going to see increased low frequency output as well as more across the entire sub range. Keep in mind a subsonic filter is a must just set it to 20-25 Hz or so and you'll be good. I would personally go with the larger of the two.
please keep us informed
im actually thinking in buy the second Sub, but im not sure, i will have to listen the one i recently buy first.
/////Alpine CDA-9887 HU
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/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable
G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
Here is the pic:
btw, I think you're picture's link is broken, I don't see anything
"Wtf is juice? I want some grape drink, baby"
polkaudio FTW!
check this:
http://www.polkaudio.com/downloads/whitepapers/SR_WhitePaper.pdf
On page 13 on the PDF (or 12 on the document)
the problem is that the website says one displacement, and then the white paper says another.
but its suppossed to be 1.3 or 1.4 for the best sound
for example i have the 1.4 Net, (1.56 without displacement)
And always remember to leave 2" or more of space between the rear end of the driver, and the backside of the enclosure for clearance, and to avoid over heating.
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable
G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
Audible Physics 3 Way: H6MB, AR3-A, AR2.0
Image Dynamics iDMax 12" D2v4
(2) Alpine PDX-V9 Bridged, Alpine PDX-M12 (500w Mid-Bass, 200w Mid, 200w Tweet, 1200w Sub)
Mosconi 6to8 v8
I just purchased two SR124-DVC, and while I was thinking what kind of enclosure to use, this thread attracted my attention.
See, my main concern is SQ, but I'm willing to sacrifice some SQ for more SPL, only and only if the SPL gain is more than the loss in SQ. As you can see, I'm trying to find the optimal SQ&SPL combination.
So, I have seen many enclosure recommendations in this thread, but none seems to point to the best one for SQ. I see sealed recommendations totaling a range between 1 cu. ft. and 1.5 cu. ft. net of displacements, but no final conclusion was achieved regarding the best SQ enclosure internal volume. So this forces me to ask: what is finally the best internal volume net of displacement to use so as to achieve the best SQ setup?
Now, the optimality subject points me to the next question. Once the best SQ setup is defined, we must see if moving to a ported box actually adds total value: with this I mean, if it augments the total SQ&SPL value, maybe by sacrificing some SQ, but the SPL gain would be greater than the loss in SQ. So, the next question is: Is there any ported box setup such that the SPL gain more than offsets the loss in SQ? If so, which would it be?
Sorry it it's too large a post, but needed to do so since I really want to get the best from my new polks!
and if u do go dual ported SRs, pa1200 is more than enough. sealed, could def go w/ more..
I still got doubts about what internal volume should I use for the sealed enclosure. The manual says 0.88 cu. ft. and 0.14 cu. ft. for displacement, giving a total of 1.02 cu. ft. But this thread has mentioned many different internal volume numbers, mostly greater than what the manual explains, saying that maybe more volume can reach better SQ levels. So I'm too confused: what is finally the optimal internal volume gross of woofer displacement to be used in a sealed enclosure with a Polk SR124-DVC?
Please, someone, help me find the best internal volume gross of woofer displacement, for a sealed enclosure, such that the SQ is optimal.
Thanks.
you can do 2 separate enclosures, and then put them together..
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable
G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
check the white paper.. you have a minimum and a maximum
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable
G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
However, further ahead in the same page of the white paper, it says "If you are looking for the ultimate in loudness .... a ported enclosure may be the way to go." But it does not specify its required internal volume nor the port specs. Where can I find such official and optimal ported enclosure specs and comparisons in SQ vs. the sealed enclosure?
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable
G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
Thanks to all who helped me here.
Do I take into account the driver displacement simply by adding up 0.14 cu. ft. to the total enclosure volume? That's all? No internal additional manipulation needed nor anything special at all?