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2007+ Mazda 3 SB-M-3-SPD/10W3v3 Installation Guide

November 28th, 2010 · No Comments

If you choose to perform the installation yourself, it is absolutely vital that the Stealthbox® be properly mounted to the vehicle according to these instructions. 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(s).
2) A loose enclosure presents a serious safety hazard in the event of a collision or sudden deceleration.
STEP 1 – In the Mazda3, remove carpeted floor panel by unsnapping at rear-most edge then remove tool panel. In the Speed3, remove the foam floor riser.
STEP 2 – Remove bolt securing spare tire with lug wrench provided in tool panel then remove spare tire.
STEP 3 – Remove sealant material from around mounting boss at center of spare tire well.
STEP 4 – Carefully drill out spot welds using appropriately sized drill bit and pry mounting boss from spare tire well floor. Install (4) #8-32 x 1 screws, nuts, washers to seal holes left by removed spot welds.
STEP 5 – Place sealant sheet provided over modified area as shown
STEP 6 – Locate rivet in floor of spare tire well at approximately 10 o’clock position. Drill out rivet with 1/4-inch drill bit, then enlarge to 1/2-inch (may need to be drilled from under the car). Place wax square provided onto floor of spare tire well in approximately 2 o’clock position as shown in illustration.
STEP 7 – Remove Stealthbox® from packaging and install 3/8 X 2.25 mounting studs into threaded inserts at bottom of enclosure. Thread driver’s side stud in, leaving about 1 1/2-inches extended. Thread passenger side stud in, leaving only about 1/2-inch extended.
STEP 8 – Place the enclosure into the mounting location with driver’s side stud extended through hole previously drilled in spare tire well floor. Press down on the enclosure to make an impression in the wax square. Remove the enclosure to reveal the impression in the wax square. Drill 1/2-inch hole in location indicated by impression in wax square.
STEP 9 – Extend the mounting stud on passenger side of enclosure to 1 1/2-inches.
STEP 10 – Route woofer wiring to Stealthbox® enclosure location and connect to terminal cup at bottom of enclosure. If the rest of the system is completed, test the Stealthbox® to ensure it’s working.
STEP 11 – Place enclosure back into mounting position with both mounting studs extended through holes drilled in floor.
STEP 12 – From under vehicle, install fender washers, lock washers, and 3/8×16 nuts to mounting studs. Put some silicone sealent between the vehicle body and, fender washer, tighten securely.


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