I'll explain this as clearly as possible. Never in my 15+ years of owning car stereos have I run into this problem. I typically buy setups with a decent head unit, amp, replaced interior speakers and subs. I currently have a Kenwood 4volt deck, Kenwood 9152 sub amp which seems to be enough for my taste, and 2 12" Diamond Audio D3's in a sealed enclosure to spec 1.5 cuft per side. My question is, why don't they hit the low lows on songs like Money Maker by Ludacris? I've tried various configuratons on the amp cross over and deck, both and one at a time. No matter what it's still not making audible the lower notes. All the typical rap bass songs are fine like Lean wit it, Rock wit it. I have some R&B tracks as well and it just falls apart on the super low notes. Iv'e been told I need woofers with low Fs and a high Qts. So it would seem the Diamonds need a ported box because the total is over 50 on the calculation with Fs / Qes. So for a sealed box that would rule out Rockford Fosgte P312D2 = 51.92 /DIAMOND AUDIO D312 = 52.77 / ALPINE TYPE-R 1222D = 63.63 /JL Audio 12W3v2-D2 = 52.37. Or would a high Xmaxx help. Yes no one can tell me how to fix this. I'm thinking new subs. You can see by what I've listed for the price range if you have any ideas....
Thanks😕
Thanks😕
you should specify which model you have. There are 4 12" D3 currently listed. Recomended Q is a bit high, .707 butterworth is more common. F3 is often in the mid 40's for a 12" sealed car application.
Check the specs on your signal processors and amplifiers. Many car audio components include rumble filters that block the really low stuff. My Audiocontrol EQL and 2XS have 33hz 3rd order highpass filters.
EDIT: and you want an overall LOW in box qts. Something like .6 will have a big low end in a car.
Dan
EDIT: and you want an overall LOW in box qts. Something like .6 will have a big low end in a car.
Dan
They have a higher qts and fs then I would normally look at.
A lower fs(all else being equal) will improve the low end extension. Qts itself I would not use to indicate how low a speaker will play. A higher Qts is better suited it is to a sealed enclosure and low Qts will indicate a vented box with ~.35 being the middle ground.
If you use an application like winISD you will get a better idea.
A lower fs(all else being equal) will improve the low end extension. Qts itself I would not use to indicate how low a speaker will play. A higher Qts is better suited it is to a sealed enclosure and low Qts will indicate a vented box with ~.35 being the middle ground.
If you use an application like winISD you will get a better idea.
Thanks for the reply! Yes I called Diamond about it earlier today and they said those subs need ported boxes to hit the low lows. Do you know of any other brand/models good for sealed enclosures such as the JBL P1222?
owdi said:
Thanks, I did turn off the subsonic filter which helps but again the sound of the super low freq are not as loud as the bass notes around 40hz. Typical rap bass. Lil Jon etc.
ckeck out Adire brahmas...they are suppose to get low in smal enclosures..
But i think your box is to small for the really low stuff.
that song 'money maker' goes LOWWW, if it was me id sacrifice one song for the rest of the systems performance and trunk space.
But i think your box is to small for the really low stuff.
that song 'money maker' goes LOWWW, if it was me id sacrifice one song for the rest of the systems performance and trunk space.
You should actually be able to get quit low in a car with sealed subs, with the in cab gain one gets from car cabin preasurization.
Virtually flat bass response is possible if the Sealed Subs, 12dB per octave roll off cooresponds with the Cars 12dB per octave cab gain. Your weak link may be your amplifer or Deck. I had the same problem with an Alpine 5 Channel amp, (Front And Rear Plus sub) I think mine high passes everything bellow 25Hz or so (I would like to know the car amps that don't).
I think ported subs in Cars will give you a huge peak as they overlap the car cabin preasurisation point to much.
Try this track out and see how it does, just try not to blow out your subs. There is content bellow 10HZ.
http://www.realmofexcursion.com/audio/Bassotronics/bassiloveyou.mp3
Lil John' get low go's almost to 30Hz.
Christina Aguilera's Can't Hold Us Down has some 32.8 Hz
Unfortunately There still isn't very much music out there that has much intentional content bellow 40Hz.
Antone-
Virtually flat bass response is possible if the Sealed Subs, 12dB per octave roll off cooresponds with the Cars 12dB per octave cab gain. Your weak link may be your amplifer or Deck. I had the same problem with an Alpine 5 Channel amp, (Front And Rear Plus sub) I think mine high passes everything bellow 25Hz or so (I would like to know the car amps that don't).
I think ported subs in Cars will give you a huge peak as they overlap the car cabin preasurisation point to much.
Try this track out and see how it does, just try not to blow out your subs. There is content bellow 10HZ.
http://www.realmofexcursion.com/audio/Bassotronics/bassiloveyou.mp3
Lil John' get low go's almost to 30Hz.
Christina Aguilera's Can't Hold Us Down has some 32.8 Hz
Unfortunately There still isn't very much music out there that has much intentional content bellow 40Hz.
Antone-
I use a single power acoustik MOFO-15 in my rav4. in a single 5cuft box tuned to 35Hz. it has so much output at below 30Hz.
doesn't need a lot of power (I once used only around 200wrms) but it booms.
not recommended for SQ though. it has a huge hole in the response at around 60-80Hz.
doesn't need a lot of power (I once used only around 200wrms) but it booms.
not recommended for SQ though. it has a huge hole in the response at around 60-80Hz.
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