IDmax 15" not too loud

[jester73440 10+ year member]

A friend of mine finally got tired of his heavy bandpass box with an audiobahn and put in an IDMAX 15" in a sealed box 1.32cuft. Well we figured it would sound better, but would lose some SPL. But it has lost close to half the loudness. He had a bigger amp that matches the subs specs more so he threw that on it (800w rms) and its still no where near the audiobahn(@ 600w rms).He notice with the trunk open he had a decent gain in volume, so he removed the trunk gasket and it got a little better. Any advice on this? The car is a 99 crown vic

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[swc204 10+ year member]

i dont think they make the idmax in a 15 in version

 

[JoseMCeee 10+ year member]

Try putting pollyfill in the box. For subs that are meant to hit the lows its a pretty good idea. Its pretty much a no brainer also because a pound and a half costs ~$3. Im not sure about ID specs but isnt 1.32 a little small for a 15? I would feel more confident puttin that sub in at least 2.0 so it would hit the lows better. Im assuming this is a prefab box which if it is, its probably your problem. Build a box out of 3/4 mdf specs to 2.0 cubes and add pollyfill. I guarantee it will sound much better.

 

[nametaken 10+ year member]

Not an IDmax, mayeb a IDQ v2? because it says those are 350 wrms, that not much.

http://www.sounddomain.com/item/IDSIDQ15D4V2

edit: and yea. 1.32 is small.

 

[zachzchw 5,000+ posts]

i dont think they make the idmax in a 15 in version

They dont.

Might explain this problem. Pics of the sub?

 

[boomzabit 10+ year member]

They DID make a 15'' IDMAX at one point in time. Even if it is an IDQ, it must not be hooked up or it is already blown or some along those lines because if it isnt anywhere near the "loudness" of an audiobahn sub in a bandpass box there is something really wrong

 

[JoseMCeee 10+ year member]

it has to be the box. 1.32 cf sounds like prefab to me. Its probably made out of some cheap ass wood and probably not even sealed right. Then subtract the displacement of the sub - ~.16 - thats hardly anything for a 15. Put it in a bigger box. Trust me it will be better.

 

[bimma85 5,000+ posts]

if its louder with the trunk open your box placement could be an issue, I do agree as well that your sub would prefer a larger box, and doing so would prolly make a noticeable change //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif.

 

[cobra65427289 10+ year member]

wasn't the IDMAX 15 dubbed the IDSPL? iirc.

al

 

[squeak9798 5,000+ posts]

They DID make a 15'' IDMAX at one point in time.

No they didn't. They have never released a 15" IDMax.

Said they were going to. But haven't done it.

 

[squeak9798 5,000+ posts]

wasn't the IDMAX 15 dubbed the IDSPL? iirc.
al

No. The IDSPL was a completely different sub line.

 

[squeak9798 5,000+ posts]

So.....we can't help you unless we actually know what sub he is using. Are you sure it isn't a 12" IDMax? Or maybe a 15" IDQv2 and not a 'Max?

 

[jester73440 10+ year member]

yes I'm sorry it is the IDQ box spec are 1.23cuft I believe. He built the box its sealed tight. Reason it is so small is he wanted it on his rear deck but has tried other positions with no luck

 

[audioholic 5,000+ posts]

He switched from a fart cannon Audiobahn in a bandpass box, to a SQ sub like an IDQ in a small sealed box, and he's wondering why he lost so much output? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[bamaboy 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/iagree.gif.15d6c075ee8d3913ba26866d06993068.gif

 

[Chevyaudio 5,000+ posts]

good point audioholic, Bahns will get lound but they sound like a bag of Shit being beat with a piece of bamboo

 

[squeak9798 5,000+ posts]

He switched from a fart cannon Audiobahn in a bandpass box, to a SQ sub like an IDQ in a small sealed box, and he's wondering why he lost so much output? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif

IMHO he's just expecting too much from the sub. It's not an SPL woofer, and having high amounts of output is far from what it was designed to do. It was designed to be a small box SQ woofer.

You could try going ported if you wanted more output.

For all the people saying that the box is too small......take a look @ ID's webpage. 1.55cuft is the largest recommended sealed enclosure for an IDQ15.

 

[00PewterSS 10+ year member]

That is a good sub. ID web site says 1.35cuft sealed, the driver is 0.15cuft so you need at least 1.5cuft. I would go with a ported box for that sub though. Their ported specs are 2.28cuft with a 4"x15" port.

It will be loud with this box and the SQ will be great. If it still isn't as loud, so what, it sounds 100x better!

Brian

 

[audioholic 5,000+ posts]

Squeak is right, IDQ's work best in amazingly small enclosures. Its one of their claims to fame, that and amazing SQ. But output isnt.

 

[jester73440 10+ year member]

True this is the 1st real SQ sub I have heard and its great. Its a real warm sound not all over the place. We knew it would be a drop in sound, just didn't realize that much would be lost.If hes not happy with it I'm gonna see if he wants to sell it