Hi everyone,

So i just bought a FI BTL 12 and I built a custom box for it tuned at around 32 hertz. Anyway I hooked it up to a Quantum Audio QCA4000D amp to test it before i actually bought the amp from the dealer. The sub is the 2ohm version and so i have it wired at 1ohm. Alrite so the sub was definitely not sounding the way I was expecting it to. It felt like it wasnt getting enough power, but when we hooked up 2 l7's to it they were beatin hard. I dont know if its just me but I dont think a kicker l7 should pound harder than the btl. Any thoughts would help. Thanks.

How big is your box?

Maybe it could be the settings on the amp?

Or the head unit?

thanks for the reply. its 2.9 cubic feet. The amp i connected to was my friends pushing 2 kicker l7'S and they sounded fine. i just hooked up my sub to it.

triple check your subwoofer wiring and make sure you have that correct. I know it sounds stupid, but things can be easily over looked.

You have it wired like this right?

the amp is a 4000w class a/b amp that can be bought new for $260 that might be part of the problem

the amp is a 4000w class a/b amp that can be bought new for $260 that might be part of the problem

lol

If it is a brand new sub its going to take a little while to break in... New subs always sound funny. Intel you get it moving it will sound off.

If it is a brand new sub its going to take a little while to break in... New subs always sound funny. Intel you get it moving it will sound off.

i disagree

Let me get this right, you are comparing the output of a pair of L7 12s to a single BTL 12, right? With the same power, right?

You have it wired like this right?

yuup

the amp is a 4000w class a/b amp that can be bought new for $260 that might be part of the problem

alrite dude its not my amp. lol. Im thinkin about getting a US amps XT-4000D. wut do u think about that 1

Did you wire it up and do all the amp settings yourself? Do you know the people at the shop personally?

You never know... Maybe if they put the amp in they did something like mess with the LPF/HPF and SSF to make you think the BTL sucks and to buy their L7s.

Just check every wire and setting.

Hi everyone,

So i just bought a FI BTL 12 and I built a custom box for it tuned at around 32 hertz. Anyway I hooked it up to a Quantum Audio QCA4000D amp to test it before i actually bought the amp from the dealer. The sub is the 2ohm version and so i have it wired at 1ohm. Alrite so the sub was definitely not sounding the way I was expecting it to. It felt like it wasnt getting enough power, but when we hooked up 2 l7's to it they were beatin hard. I dont know if its just me but I dont think a kicker l7 should pound harder than the btl. Any thoughts would help. Thanks.

I have twelve inch btl and its not going to match the output of two 12 or 15 inch L7's. It doesn't have the cone area to do so. It an unfair match up your placing 113.1 sq inches of cone area against roughly 288 sq in or 450 sq in. I think the 18 inch btl could out due the 12 L7's on the same amount of power.

also I find kicker sound louder then what they really are. Normally people here tune them so high they almost play like a pair of mids that are tuned very low.

yeah

that btl should be doing work

dont get the us amps xt4000 amp. its only going to give you 1500 watts at best if you are thinking you're going to get 4000watts.

and don't let a shop you don't know well hook your stuff up to compare something you are going to buy from them vs what you got.

You have it wired like this right?

yuup

Would this be same thing or not?

Edited February 17, 200916 yr by i like fi

yes

edit: even when you switched it, its still the same

This Doesn't Make Any Sense. I've Seen SSD's Kill L7's With The Utmost Of Ease.

A Rule For Me Is If You Have To Take It To A Shop, You Shouldn't Have It At All.

Quantum Is Childs Play To Me, Never Liked Them. And I'm Sure A Sundown Can Cure Your Problems If You Set It Up Right, And Not Let A Shop Do It. Most Shops Are Filled With Mainstream Brand-Loyal Noobs Anyway.

Do you have enough port area?

This Doesn't Make Any Sense. I've Seen SSD's Kill L7's With The Utmost Of Ease.

A Rule For Me Is If You Have To Take It To A Shop, You Shouldn't Have It At All.

Quantum Is Childs Play To Me, Never Liked Them. And I'm Sure A Sundown Can Cure Your Problems If You Set It Up Right, And Not Let A Shop Do It. Most Shops Are Filled With Mainstream Brand-Loyal Noobs Anyway.

I never said that I was at a shop. I dont need a shop to handle my stuff. I was testin it usin my friends amp and I said before i actually buy the amp from a shop, not that i was at a shop. I know the quantum is a POS I was looking at it because i didnt have money for somethin else.

try a different amp? or have you already done that? i like crunch / hifonics amps alot they're cheap and pretty damn good. i got one 15 bl running off a hifonics brutus bxi1208d running at around 900 watts rms and it beats like none other.

haven't been here in a while. can you post up pics of your box or at least the measurements of it and the port?

try a different amp? or have you already done that? i like crunch / hifonics amps alot they're cheap and pretty damn good. i got one 15 bl running off a hifonics brutus bxi1208d running at around 900 watts rms and it beats like none other.

do you think that the HIFONICS brutus BXi2008D should be good for an amp under 300?