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Infrasonic Filter:
Switch “Off” for Sealed Enclosure.
Switch to “30Hz” for Ported Enclosure
Input Sensitivity Controls:
Proper adjustment of these controls is critical!
For virtually all aftermarket head units,
set “Input Voltage” to “Low.
See “Input Sensitivity Setting Guide”
on pg. 14 for precise setting instructions.
Dual Mono Speaker
Output Connections:
Connect wire directly to “+”
and “–” “Subwoofer Output
connections and to the W7.
LF Boost:
Generally not necessary in
W7 applications (we
recommend defeating it by
turning the dial to “0”).
Amp Low-Pass Filter:
SetMode/Slopeswitch to “24dB”.
Set “Filter Freq. (Hz)” knob to “85”.
Lower settings are likely to result in a
poor transition between the upper
response of the W7 and the lower
response of the mid-bass speakers.
Amplier Input:
Connect RCA-type cables from
the head unit (or processor) to
these two jacks. Use both jacks
(with a Y-adapter if necessary).
Remote Bass Port:
Permits connection of an
optional remote bass boost
controller (RBC-1), giving you
control over the EQ boost from
the front of the vehicle. The RBC-1
controller is sold separately.
8W7-3
Free Air Resonance (Fs): 35.2 Hz
Electrical “Q” (Qes): 0.654
Mechanical “Q” (Qms): 9.50
Total Speaker “Q” (Qts): 0.612
Equivalent Compliance (Vas): 0.61 cu. ft. (17.4 ltrs)
One-Way, Linear Excursion (Xmax)*: 0.75 in. (19 mm)
Thermal Power Handling (Pt): 500 Watts Continuous
Reference Efficiency (no): 0.112 %
Efficiency (SPL @ 1W/1m): 82.7 dB
DC Resistance (Re): 2.78Ω
Effective Piston Area (Sd): 38.0 sq. in. (0.0245 sq. m)
Nominal Impedance (Znom):
* Xmax specifications are derived via one-way voice coil overhang method
with no correction factors applied.
RECOMMENDED CONTINUOUS RMS POWER RANGE FOR ONE SUBWOOFER DRIVER:
250W 500W 1000W 2000W 4000W125W
JL Audio 250/1v2:
These settings are intended
as a “baseline” for tuning
your system. Depending
on your vehicle and your
preferences, some variation in
the crossover and bass control
settings may be necessary
for optimum performance.
= position of knob
= position of switch
= switch with two possible positions
= setting will vary (see sidebar)
Amplifier Recommendation: 250/1v2 (pictured) or G1700
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