Problems with BTL setup

[RamenNoodles 10+ year member]

Hey all,

Today I just got my 12" BTL and my Crunch GP3000D along with my custom box and I installed everything today and to be honest I am not impressed with this subwoofer at all.

Like when the subwoofer hits, it sounds like it is bottoming out and I dont understand why. I use to have 2 12w6v2s to a JL 1000/1 and it was hitting WAY harder than my 12" BTL. I just met my friend who I sold my w6s to and he was running them to a Kenwood amp pushing 600rms to them and they were slamming compared to my BTL.

I just am not impressed with the performance of the BTL at all. It cannot pick up anything high at all. I know it is a SPL sub, but I have read tons and tons of peoples reviews saying that it actually had decent clarity.

I used my dB meter that I have and my best on the 12w6v2s was 147 no sound deadening whatsoever. Now I have my whole trunk competed in FatMat in 1 layer and 2 layer on my trunk. I did a test today and the best I got was 135 WTF??

Does anybody have any idea what is going on?

Well the sub is wired to 1 Ohm.

I have stock electrical besides an optima red top. I have a tsunami wiring kit 1/0awg. All in a 2000 accord coupe with the sub and port facing toward the cabin.

These are the builders specs.

Ok, here is the design for you. 14.5"H x 24"W x 24"D, 3.809^3ft gross vol. Slot port, 13" x 3" x 27.8"Long@35Hz. After all displacement, 2.833^3ft net yield. Built from 3/4" Hi-Composite Premium UDF board. Seams matched and double sealed. Reinforced baffle board. Dado cut end caps. Seams fastened with Tite Bond glue, 1-5/8" counter sunk drywall screws, and 2" Ribbed steel fasteners. Walls fully braced and tied in with Maranti Hardwood bracing for Zero wall flex and 100% cabinet integrity. 45 degree boards in the corners to kill standing sound waves and to add extra strength to the corner seams. All internal port edges are beveled. High Quality, Gold plated binding post with nylon heads. Gray Muzicon carpet. White baffle board. Port painted black

And this is NOT a TermLab so its not exactly term lab numbers, I think it runs a little high.

THis is a quick drawing of how everything is wired...

Click to read more...

 

[RidnClean 5,000+ posts]

maybe its the stock electrical?

 

[DaGh0st 5,000+ posts]

turn the box around...i did that once in my car it turned out to be a big diff.

other then that check your wiring...mabe one coil came lose

 

[RamenNoodles 10+ year member]

Yea man fully loaded, 3rd mag, cooling, hixm, daily dual 2 ohm.

 

[Skip01 5,000+ posts]

Whats the settings on the amp?

Maybe the low pass and ssf are set wrong?

I had my BTL 12 off my 500.1 at .5ohm and COULDNT get it to bottom out, where as i could with my HDC 12

 

[RamenNoodles 10+ year member]

So you really think that turning it around will make a huge difference?

And I will recheck wiring tomorrow I guess, So **** hard to get the sub in the recessed cutout!. My **** fingers are killing me.

 

[patrick1202 10+ year member]

..

 

[Andrew12 10+ year member]

Unless you have your box sealed off from the trunk in your honda, its probably not going to sound as good as it can by facing it towards the trunk. Since the sub is facing towards you, it may be the tinsel slap that you hear that is making it sound like its bottoming out?

 

[RamenNoodles 10+ year member]

dual 2ohm man.

Yea I will have to try all this out tomorrow, and I will get those amp specs for you all tomorrow, too dark to see anything right now.

 

[RamenNoodles 10+ year member]

Unless you have your box sealed off from the trunk in your honda, its probably not going to sound as good as it can by facing it towards the trunk. Since the sub is facing towards you, it may be the tinsel slap that you hear that is making it sound like its bottoming out?

Now that you say that, I am playing all of this with the box and port facing the cabin with both of my back seats folded down. Should I try different variations tomorrow.

The best results I had with the w6s were facing the trunk lid and the back seats down.

 

[Skip01 5,000+ posts]

Some cars are louder facing forward, it may make the noise go away though

Maybe your just unloading it, no control on the cone with a box that big and that much power

Really......3.8cu?

NVM....2.8net

 

[patrick1202 10+ year member]

you sure it is not a d1?? just checking i know you could have ordered a d2 and accidentally got a d1

 

[RamenNoodles 10+ year member]

you sure it is not a d1?? just checking i know you could have ordered a d2 and accidentally got a d1

Hm, well that would be no good. How would I check for that? And someone else said it could be a bad coil, how could I check this...?

 

[RamenNoodles 10+ year member]

Ok well I will definitely have to try moving it the opposite way tomorrow. Thanks for all the help guys. I will post my findings!

 

[Skip01 5,000+ posts]

some cars, true.
But 95% of them.

Meh....i wouldnt say its that high

In fact its probably more that like faced forward than back to tell the truth

Back is probably the best for sound quality, but forward or side is louder in most apps that ive seen or played with