JL Audio SB-J-LBRTY/12W3 User Manual

Specifications:
Enclosure Type: Acoustic Suspension (Sealed) 
Driver Type: One 12W3v2-D2 Subwoofer
Nominal Impedance: 4

Ω

Cont. Power Handling: 300Watts

JL Audio recommends using a high quality amplifier such as the JL Audio 250/1. The diagram below shows the recommended
crossover, infrasonic filter and equalizer settings for the 250/1 when being used to power your Stealthbox®.

Included Hardware:
(2) 3/8”-16x2 1/4”Socket Cup Set Screws
(2) 3/8” x 1 1/4” Fender Washer
(2) 3/8” Split Lock Washer
(2) 3/8” Hex Nut
(4) Rivets 

10369 N. Commerce Pkwy, Miramar, Florida 33025-392      Phone: 954.443.1100     Fax: 954.443.1111

JL AUDIO 250/1

monoblock subwoofer amplifier

Amplifier Input Section

Input Sens.

Input Voltage

Low/High

Left Ch.

Right Ch.

Signal Sensing

Off/On

Output Mode

Full-Range/Low-Pass/High-Pass

Left Ch.

Right Ch.

Amp LP Filter

Mode/Slope

Off/12dB/24dB

Filter Freq. (Hz)

Bass Control

LF Boost (dB)

Off/30Hz

Infrasonic Filter

+1

+13

+3

+7

+10

Preamp Output Section

+12VDC

Ground

Remote

The JL Audio 250/1 is a very versatile audio component. Please consult the owner’s manual for detailed information
about installing and tuning this amplifier.

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STEP  13(b): This is the more time consuming,
but easier way to access the front exposed threaded
rod.You need to unbolt the over flow gas can. Please
make sure that you are careful and you do not tip
over this plastic tank. Do not do this while smoking.

The three arrows show the three mounting nuts
that have to be removed. Unbolt and carefully sup-
port this palstic tank.

After the tank is supported, place a supplied
3/8”fender washer, a supplied 3/8” lock washer then
a supplied3/8” hex nut in this order onto the thread-
ed rod.Thighten.

STEP 14: The rear exposed socket cup set screw
is a lot easier to excess. Place a supplied 3/8” fender
washer, a supplied 3/8” lock washer then a supplied
3/8” hex nut in this order onto thesocket cup set
screw.Thighten.

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S B - J - L B RT Y / 1 2 W 3 ,   J L   AU D I O,   I n c   2 0 0 3

S h e e t   S K U # 0 1 1 1 6 8     R ev i s i o n 4 / 9 / 2 0 0 3  

VR650-CSi

TR650-CXi

Front Location OEM’s Driver Size:
6 3/4” (171.45mm)

Applicable JL Audio Products:
TR,VR,XR 650-CXi,CSi

Rear Location OEM’s Driver Size:
6 3/4” (171.45mm)

Applicable JL Audio Products:
TR,VR,XR 650-CXi

STEP 15: With the Stealthbox properly mounted,
run speaker wire to the Stealthbox’s terminal cup.
Wire it up.

Double check for proper functioning of the woofer
at this time.

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