JL Audio Car Speaker SB GM SLVEXT 12W3 User Manual

S B -G M -S LV E X T /1 2 W 3  
S t e a lt h b o x ™  
F it s 1 9 9 9 -U P E x t e n d e d -C a b  
F u ll-S iz e G M P ic k u p Tr u c k s  
In s t a lla t io n G u id e :  
This Stealthbox is a product which requires professional installation skills and tools. Please read this  
installation guide thoroughly before beginning the project. It will guide you step by step through the  
installation. Several of the steps in this process may require two people to accomplish.  
It is absolutely vital that the enclosure be properly mounted to the vehicle according to these instruc-  
tions. Failure to mount the enclosure properly presents two problems: 1 ) The sub-bass performance  
will suffer due to the movement of the enclosure caused by the force exerted by the woofer and 2 ) A  
loose enclosure presents a serious safety hazard in the event of a collision or sudden deceleration.  
STEP 1 : Fold the rear bench seat up.  
STEP 2 : Run speaker wires to the rear of the cab under the  
bench seat.  
STEP 3 : Peel the backing from the supplied square of wax and  
place it on the floor of the cabin in the location shown in the  
picture. This will be used to mark the location of the hole for  
the mounting bolt. The wax square should be in the location of  
the threaded insert in the enclosure when the enclosure is  
placed in the proper location within the vehicle.  
STEP 4 : Thread the bolt into the threaded insert in the  
Stealthbox. Tighten Fully.  
STEP 5 : Place the Stealthbox in its mounting location on the  
floor of the cab. Press down on the enclosure firmly to make an  
impression on the wax sheet with the head of the mounting bolt.  
STEP 6 : Remove the enclosure. There should be a clear mark  
where the bolt pressed into the wax square.  
STEP 7 : Check under the truck for any loose brake lines, fuel  
lines or other hazards before drilling.  
CAUTION: Alwa ys wea r eye pr ot ect ion when  
dr illing.  
STEP 8 : Drill a 1 / 2 " diameter hole through the floor pan of the  
truck using the indentation in the wax square as a guide. Make  
sure you hold the drill straight and that the hole you are drilling  
is centered on the wax mark.  
STEP 9 : Trim speaker wire to length and connect to the  
enclosure's barrier strip observing correct polarity. Positive is  
designated by the red wire on the barrier strip.  
S h e e t S K U # 0 1 1 1 4 0 R e v is io n 1 0 /5 /0 1  
S B -G M -T R K E X T 9 9 /1 2 W 3 -D 2 , J L A U D IO , In c 1 9 9 9  
P a g e  
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