If you are going to keep the enclosure and not even get the gain of being able to use an enclosure half the size, I see no good reason for you to do this to be honest.
Best Solution for this Install?
I currently have this setup in my car.
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The subwoofer in question is the Illusion Audio Luccent Im-12 in a sealed enclosure measuring about 1.5 cu ft.
I intend to add one more of these Luccent subwoofers that i just purchased, but intend to keep the install as neat and unobtrusive as possible.
I have been suggested an Isobaric install, where the front of the 2nd sub will be placed facing the front of the already present sub (Clamshell design).
I have read quite a bit on clamshells and isobaric subwoofer setups, and have noted that almost everyone says that this setup behaves like one subwoofer and takes double the power, with the advantage of just halving the volume required.
My prerogative of adding another subwoofer is definitely not to increase the SPL levels, but to improve the sound quality. The general consensus is that subs mounted in isobaric form are quicker and blend better with the front stage. I intend to do the same thing.
The Luccent Sub is anyways a very lightweight sub with razor sharp reflexes, and its forte was never to 'cause a din' or 'break db records'
The current setup in my car doesn't even allow me to feel that there is a sub firing in my boot, and I intend to keep it the same even after the 2nd sub comes in.
My question to you'll is: Am i doing the right thing by going isobaric? Anyone has a better way of doing this? I do not want to replace the enclosure that is pictured. I dont mind making some modifications to it, but I need to keep this, since I just got it a month back.
Some photos of the present enclosure:
![]()
![]()
The subwoofer in question is the Illusion Audio Luccent Im-12 in a sealed enclosure measuring about 1.5 cu ft.
I intend to add one more of these Luccent subwoofers that i just purchased, but intend to keep the install as neat and unobtrusive as possible.
I have been suggested an Isobaric install, where the front of the 2nd sub will be placed facing the front of the already present sub (Clamshell design).
I have read quite a bit on clamshells and isobaric subwoofer setups, and have noted that almost everyone says that this setup behaves like one subwoofer and takes double the power, with the advantage of just halving the volume required.
My prerogative of adding another subwoofer is definitely not to increase the SPL levels, but to improve the sound quality. The general consensus is that subs mounted in isobaric form are quicker and blend better with the front stage. I intend to do the same thing.
The Luccent Sub is anyways a very lightweight sub with razor sharp reflexes, and its forte was never to 'cause a din' or 'break db records'
The current setup in my car doesn't even allow me to feel that there is a sub firing in my boot, and I intend to keep it the same even after the 2nd sub comes in.
My question to you'll is: Am i doing the right thing by going isobaric? Anyone has a better way of doing this? I do not want to replace the enclosure that is pictured. I dont mind making some modifications to it, but I need to keep this, since I just got it a month back.
Some photos of the present enclosure:
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1 - 16 of 16 Posts
Your premiss that having two subs is better than one may take some examining if you are not getting audible distortion at your admittedly not high output levels. I've run one sub and then added another identical sub/box to get more output, but the quality of the bass stayed the same at lower volumes. To get that bass that may "...punch you low down in the back," you may want to try to take advantage of your subs strengths and run the LP up to about 100 to 120 hz and increase your HP to midbasses accordingly and use your 7200MkII's parametric EQ to give you a bit of judicious boost at about 70hz or so or run RTA if ya got access. This should at least be a start to giving you some midbass punch.
However, from my experiance w/ the ND-12 these subs while being very clean, articulate and having the ability to disappear, what they don't do well is hit/reach the lowest octave w/ authority. Your IM-12 models pretty similarly at 1.5 cuft. for Qtc of .69 and F3 of 58hz. Don't know if you can tune or otherwise EQ that low end authority in and maintain your overall SQ.
OTOH it looks cool to run two subs so just double up the volume to 3 cuft. and check to see if your bridged RF can run into a 2 ohm load.
i am going to try that soon. im in the process of a few upgrades, and will complete the list of upgrades and then try this. sounds like a good idea.
absolutely true! these shallow subs dont do the lower frequencies good justice. hence i thought, lets have 2 of them do the same job and then see how it sounds. as of now im going isobaric clamshell, and will post more information as it happens. the enclosure will be modified to accommodate the 2nd sub, so lets see how much of an increase in volume we can get.
my RF is not supposed to be stable at 2 ohms, and the fact that it does only 80 W per channel at 4 ohms, means its time for it to go. the 2 subs will get their power (for the moment) from my ground zero 4 channel amp, that does 220*[email protected] 4 ohms. 220W is a decent amount of power to the sub, considering its musical acumen and ability to play well even at sub 150W (tried that for a bit too)OTOH it looks cool to run two subs so just double up the volume to 3 cuft. and check to see if your bridged RF can run into a 2 ohm load.
lets see how it sounds!?
1 - 16 of 16 Posts
