Hey guys im getting ready to build a speaker box in the xb with some kicker L7's. My question is, can the speaker be mounted "inverted" style with the magnet out of the box? Will it hurt the speaker? My dad got to talking with some people and they said the L7's weren't meant to be inverted. Can anyone shed some light on this and does any one with the L7's post some pics, I have a couple ideas but I would like some more

Thanks everyone for the help!



NEW QUESTION: Would it be possible to run 1 kx1200.1 to 3 L7's? I want to know if anyone has done it? And if the amp would get hot because of it trying to power so much? I have 2 amps, but to save space i would like to only run 1. Any new insight would be greatly appreciated!!

Dustin

 

There is no reason why you cannot invert an L7 as long as you switch its polarity. There is nothing abnormal about its structure, other than the fact that the cone and surround are square.

 

What do you mean switch polarity? So as long as there isn't anything interfering with the cone i should be allright?

 

Speakers actually move air both inwards and outwards in the same fashion. They move the same distance up as they do down, which typically means that any normal cone speaker can be mounted inverted without issue. The same basic principles of required enclosure volume (air space) still apply, whether the magnet is in the enclosure or out. The only major differences are that the enclosure volume will actually increase slightly with the woofer inverted due to the lack of basket structure and magnet occupying enclosure volume, and the slight drop in the speaker's output efficiency because of a difference in surface area of the cone, i.e. the larger surface area of the cone (the front face) is now applying pressure into the enclosure instead of outward.
The polarity (+ and - inputs of the woofer) needs to be reversed in order to have the woofer in phase with the rest of the stereo system. What this will do is reverse the direction the woofer moves first, in or out. Since the woofer will be inverted, it needs to be moving opposite its typical direction in order to bring it back in phase with the rest of the stereo. Otherwise, you'll have some rough-sounding, muddy roll-offs between mid-bass and bass frequencies, which really can make a good-sounding system sound bad.
A few amplifiers have a "phase shift" switch or button that will switch the polarity for you. If yours does, then all you need to do is set the switch accordingly. If not, or if you are wiring woofer(s) inverted in the same circuit as normal mounted woofers, then you typically have to switch the polarity at the inverted woofer(s). For a single woofer, wire the amplifier's + to the woofer's - and the amplifier's - to the woofer's +.
...My apologies for the novel. I hope all of this makes sense.

 

ur gonna need a big box

 

Thanks for the input. it makes sense now!

Box size really doesnt matter to me, it all for show ne way.

 

up for new question

 

 

Thats the kind of design i was going for only with 3 L7's

Box looks really good!

 

tight squeez if u wanna do 3l7s across the width of trunk of the xb id have to be arched moree.
ill have more pics as i work on it
thankyou

 

The enclosure would have to be CONSIDERABLY larger in order to adequately accommodate L7s. Kicker subs are known for requiring quite a bit of volume in order to perform well at lower frequencies. The enclosure pictured seems awfully small, even for 2 L7s! What's the volume of that enclosure?
The 'glass work looks good so far! ...Nice and smooth!
It should come out quite nice!
Yes, you can run 1 KX1200.1 on 3 L7s, provided that they are wired correctly. L7s come in a dual-2ohm and dual-4ohm version. If you had 3 dual-2ohm L7s, wired series-parallel (each set of coils per woofer wired in series, and the woofers wired together in parallel), the amplifier would see an approximate 1.3 ohm load. At 1.3 ohms, the amplifier will dish out approximately 900 watts RMS. If the KX1200.1 is stable at 1 ohm, then it shouldn't have a problem at 1.3 ohms, provided that you don't overdo it with the gain control.

 

Yea i know the parallel and series wiring, I was just making sure I wasn't gonna overdue the amp and overheat it all the time. Sweet so that can save me one some space for the 2nd battery! lol. Like i said its all show so as long as it isnt gonna burn the car down, looks good, and i can still bump with it, Im happy.

 

oh..its huge 11.5 round there requires 2 6inx14 ports itll bump alil

 

i no the solos look good but they were ment to be pushed. and i also understand you want mostly show but if you have 3 l7s and only 900 watts cont some folks will frown when they hear it. not raggin on ya just my .02. and btw before yall ask i am running a memphis mojo 15 with well over 2000 watts cont. in almost a 6 cube inclosure ported with a 24x5 in port.

 

^ now thats a boombox