My Box Design Specs

Oh I realized what you meant by DVC :)

No they are SVC :)

Go to kicker.com and click support, then technical support, then T/S parameters.

They are the 8 ohm listed under comp.

Thanks again for all your help Stevdart.

Yes, if they are single 8 ohm subs they will work well with that amp.

There are too many discrepencies in the published info to model this sub successfully.  Actual use and trial-and-error would likely work out best.  The discrepencies lie in the fact that those T/S parameters as listed don't compute in a true T/S calculation.  For instance, this sub can't have Fs, Bl, Mms and Vas as shown and still compute.  The website clearly shows 'DVC' on the pull-down tab but the manual indicates single voice coil.  I suspect some other misprints here and there.  So, with everything I've seen...

...I would say that you would most likely get the results you want in a large sealed box.  Use the guidelines shown in the sub's manual for maximum SQ, which is still a high Q (higher than true SQ) as shown below.  The manual indicates that all of the larger sealed and vented enclosures allow for 150 watts per sub, so your amplification looks good for two of these.  The graph below shows a huge box at 7 cu ft, which is what Kicker recommends the maximum size to be to attain a reasonably SQ response.  Smaller sizes send the peak up and up and raise the F3.  You should use whatever will fit into your car, keeping BIG as much as possible.

Cheers and good luck with your results.

kicker_05c128.jpg

Would I be better just sending these back and getting an all in one enclosure with the speakers already?  This is getting a little more complicated than I thought it would be and I haven't even started building the box yet

Those response curves looks like crap to me, unless you plan to go into SPL comp and your vehicle resonance frequency is around 90Hz.  But I suppose if you were going into comps you probably wouldn't be asking about your low-power amplifier... Listen to Steve's advice about how to model those speakers.

cypsteel wrote: This is getting a little more complicated than I thought it would be and I haven't even started building the box yet

Yes, building a proper enclosure for loudspeakers can get quite complicated and a properly designed bandpass is one of the most difficult of all.  In fact if you are an inexperienced builder I'd say do not attempt a bandpass enclosure under any circumstances, and especially not one for dual drivers.  Also, you are not likely to ever get really excellent response from those low-end Kicker speakers, they just are not very good IMO, so you may be modelling the best they can do.

My only experiences with boxes where prefab bandpasses with the speakers already installed.  We thought they sounded great because they hit so hard and got some of the lower frequencies.   A couple of my friends attempted building sealed and ported boxes but they could really never match up.  With that being said, I ordered two Kicker 12" comps (8ohm).   I have had hell trying to design a medium spl / SQ box as shown in this thread:

https://www.the12volt.com/installbay/forum_posts.asp?tid=80541&PN=2

I need some opinions where I should go from here, I am dying for my low end now that I got my front stage working!

• A.  Send the Kicker's back and buy a comparable replacement.  What would yall suggest?
• B.  Send them back and buy a prefab bandpass or sealed box:   http://www.maaudio.com/productcatalog.cfm?class=47495
• C.  Build a box with the kickers even though I can't find a good SQ line that fits my type of music (hip/hop / rock).
• D.   Send the 12's back and buy some 10's to put in my old bandpass box.

Thanks in advance for any suggestions,

Justin Pedersen