2 Ohm Nominal
Coaxial Speaker
OWNER’S MANUAL
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FEATURES
SPL 55 Midrange / Woofer
The SPL 55 is an excellent performer with a combination of high
sensitivity, solid bass and smooth response throughout the audible
range.
· Lightweight Cone designed for good rigidity and high sensitivity
· 2 Ohm Voice Coil for increased voltage sensitivity and higher
output
Aluminum Dome Neodymium Tweeter
The SPL 55's coaxially mounted tweeter is a high performance 1”
Neodymium tweeter designed to deliver outstanding high frequency
reproduction.
· Black Aluminum 1" dome for improved power handling and
linear response
· Ferrofluid-immersed Voice Coil enhances heat dissipation
· Vented Aluminum Voice Coil Former for superb heat dissipation
and high power handling
Passive Crossover Network
· The crossover consists of high quality, 2 pole design for improved
power handling, lower distortion and better imaging.
· Acoustic Summation design combines the crossover with the
speaker's natural roll-off for a steeper slope and increased power
· Dynamic tweeter protection allows for improved power handling
and continuous output
2 Ohm Nominal System Impedance
The 2 Ohm impedance design of the SPL 55 system provides an overall
3 dB increase in output compared to a 4 Ohm design.
· Effectively a doubling of Sound Pressure Level -- with the same
voltage input
· More stable, phase coherent load than two 4 Ohm speakers
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· The first step in a successful installation is
LOCATION
AND
MOUNTING
thorough planning. Choose the location for your
speaker components carefully.
Follow these
suggestions to ensure proper imaging and the best
performance:
· Choose a location that offers the least obstruction
of sound to your ears.
· Always check behind the chosen mounting
locations to make sure that there are no
obstructions (e.g., trunk springs, gas tank, window
tracks) or wires in the way, as well as to make
sure that there is ample support on which to
mount the components.
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The SPL 55 can be mounted on the front or rear of
a panel; gaskets are provided for both options. The
bolt hole configuration will fit a variety of American,
Asian and European OEM patterns making it ideal
for direct placement. Best performance is achieved
when the speaker is securely mounted to a door
panel or rear deck. There should be no gaps
between the speaker and the mounting surface, as
this will impair its low frequency performance. Be
certain that both the panel and the speaker are
securely mounted to prevent unwanted vibration.
INSTALLING
THESPL55
1) Mark the speaker location by using the
template provided.
2) Cut the opening and debur the edges with a
file.
3) Hold the speaker in place against the mounting
surface and mark the mounting bolt holes.
6) Drill the appropriate size hole for the screws
provided.
7) Place the SPL 55 into the trim ring, make the
speaker wire connections, then install the
speaker/trim ring assembly to the panel using
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SPL 55 Wiring Diagram
WIRING
The figure below shows wiring for the SPL 55 speaker. It is
important to make sure that all connections are in phase; that
is positive (+) is connected to positive (+), and negative (-) is
connected to negative (-) since an out-of-phase connection
will cause a dislocated image and low bass output. We
suggest using premium cable. The connectors provided with
this system will accommodate wire from 12 gauge to 16
gauge.
Head Unit
Amplifier
SPL 55
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SPECIFICATIONS
SPL 55 Specifications
Frequency Response
70 Hz - 20,000 Hz ±3dB
Sensitivity
93 dB SPL at 1 meter (2.83 Volts)
99 dB SPL at .5 meter (2.83 Volts)
Continuous Power Handling
Peak Program Power Handling
Nominal Impedance
50 watts
100 watts
2W
Crossover Slope Rate
12 dB/octave ASC
Metal Dome Tweeter
Frequency Response
Sensitivity
5000 Hz - 20,000 Hz ±3dB
94 dB SPL at 1 meter (1 watt)
Nominal Impedance
4W
Nominal Tweeter Diameter
1”
Dimensions
Nominal Driver Diameter
Mounting Cut-Out Diameter
Mounting Depth
5 1/4”
4 3/4”
2 1/2”
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(Rev A, 1/3/97)
120 Blue Ravine Road Folsom
tel 916.351.1288
California 95630 USA
fax 916.351.0414
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