18 inch fi Qs

 

Silver Member

Post Number: 811
Registered: Jun-07
has any one ever sealed one?

looking at putting them in my freinds blazer around chirstmas.
he just wants to kill the lows.
i was thinking tune it to 25Hz but sealed has came to mind.

anything better than 18 fi Qs?
how low can these be tuned too?
 

Silver Member

TEAM REVOLUTION Lincoln,NE

Post Number: 159
Registered: Aug-08
can tune it from 28Hz to 32Hz i had a 18" and still do for sell and had a 9 cubes @ 32Hz and i love it grate sub
 

Gold Member

Rock Vegas, NC US

Post Number: 2805
Registered: Mar-06
I put an 18 I my friends canyon, 9 cubes at 28hz and it killed the lows. I wouldn't suggest lower than 28...
 

Silver Member

Post Number: 813
Registered: Jun-07
this might be a stupid thing to ask but why not tune lower than 28?

so u have an 18 Q? or is it something different? very interested! email me at worrblade@yahoo.com
 

Gold Member
Username: Livin_loud

Post Number: 2642
Registered: Jan-06
i tried ported @ 30hz with my first box. it was nice. low end monster. then went sealed, lost a little low end, gained a bit on the higher notes. i'd go ported.
 

Silver Member
Username: Kingandsons07

TEAM REVOLUTION Lincoln,NE

Post Number: 178
Registered: Aug-08
x2^^^ 28Hz kill the lows lol
 

Silver Member
Username: Deadrabit

Post Number: 817
Registered: Jun-07
all i want is to kill the lows.
i have never listened to something tuned that low, i am pretty pumped to get it done. but ill have to wait till chirstmas to get started
 

Gold Member
Username: Livin_loud

Post Number: 2643
Registered: Jan-06
yeah, its great having a sub that doesn't bottom out on the lows :-) i honestly didn't use my sub sonic at all
 

Silver Member
Username: Cplaya280

Pennsylvania USA

Post Number: 993
Registered: Oct-05
the AudioPulse Revo Subs can be tuned really low also and kills the lows i have one tuned at 32hz and its deffinetly low and hits the higher notes decent. 1 Sub cost like $400 tho
 

Gold Member
Username: Shortysetnies

Andrew Capps, NC US

Post Number: 2815
Registered: Mar-06
32hz isnt low... 32-35 is average
 

Silver Member
Username: Deadrabit

Post Number: 818
Registered: Jun-07
so can any one tell me y i shouldn't tune it lower than 28?
 

Silver Member
Username: Shade

Moxee, Wa U.S.

Post Number: 752
Registered: Nov-06
because u will be lower then the Fs of the sub.
 

Gold Member
Username: Shortysetnies

Andrew Capps, NC US

Post Number: 2816
Registered: Mar-06
And plus, if you hear it at 28 you wont want anything more from that sub... As long as its installed right and you have proper amps and charging... Just take my word on it
 

Silver Member
Username: Deadrabit

Post Number: 819
Registered: Jun-07
the Fs is 24.5 Hz

i know it will be good at 28. but i want the lowest i can go
 

Bronze Member
Username: Lil_justin850

Justin smith, crestview, Fl Okalossa

Post Number: 13
Registered: Sep-08
28 is low low youll see
 

Gold Member
Username: Shortysetnies

Andrew Capps, NC US

Post Number: 2817
Registered: Mar-06
do what everyoe does and make different boxes tuned differently. I guess we can't tell you what box would work best b/c every car is different.
 

Platinum Member
Username: Insearchofbass

Post Number: 10586
Registered: Jun-04
Going with the sub tuned at 25 hz will probably give you better output at around 30 hz if that is your focus but the upper bass may suffer.
 

Gold Member
Username: Bonhamd

Post Number: 1236
Registered: Nov-07
but 28hz is pretty low - i have to believe taht a Q 18 would be raping lows in a box like that
 

Silver Member
Username: Brewsky

Prince george, British colu... Canada

Post Number: 137
Registered: Aug-08
if he ends up getting something better then the fi Q's give me a shout with what he wants for them :D
 

Gold Member
Username: Philly306

If it werent for box r...

Post Number: 1319
Registered: Apr-07
Go sealed with the Q
 

Gold Member
Username: Nd4spd18

Philadelphia, PA

Post Number: 8532
Registered: Jul-06
Those subs do work very well sealed. I have 2 10"s.
 

Gold Member
Username: Shortysetnies

Andrew Capps, NC US

Post Number: 2825
Registered: Mar-06
not saying they don't work well sealed, but w/ what he's looking for, ported is the way to go...
 

Gold Member
Username: Philly306

If it werent for box r...

Post Number: 1320
Registered: Apr-07
With an EBP of 38.28 for the dual 1 18" and 37.78 for the dual 2 18" on top of having a somewhat higher Qts makes it a great canidate for a sealed box.
As for low end sealed would be great too. It will allow for a much less steep roll off compared to a ported box that will drop off drastically after Fb.
The loss of a few decibels is well worth the gain in overall response not to mention the space saved and ease of design of a sealed enclosure.
 

Gold Member
Username: Shortysetnies

Andrew Capps, NC US

Post Number: 2826
Registered: Mar-06
guess I should word those past two statements differently. From personal experience ported>sealed in the same truck, same amp and same sub. The best way for you to know exactly what sounds better and sounds like what you want is to try for yourself and build both...
 

Gold Member
Username: Thomas_g

NM

Post Number: 2360
Registered: Oct-05
Had a couple of 18" Q's sealed and they were still pushing on your ears loud. I would go ported though.....
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