Gorilla GLW-15 - Subwoofer SPL - Free user manual and instructions

Product Type	Subwoofer
Brand	SPL
Model	Gorilla GLW-15
Driver Size	15 inches
Amplifier Power (RMS)	500 watts
Frequency Response	20 Hz - 200 Hz
Impedance	4 ohms
Enclosure Type	Bass reflex with port
Power Supply	AC 100-240V, 50/60Hz
Dimensions (W x H x D)	20.5 x 19.5 x 18.0 inches
Weight	52.5 lbs
Input Connectors	RCA line inputs, Speaker level inputs
Output Connectors	Speaker level outputs
Controls	Volume, crossover frequency, phase switch
Protection Features	Short circuit, overheat, overcurrent
Cabinet Material	MDF with vinyl finish
Grille	Removable cloth grille
Placement	Floor standing, corner or along wall
Cleaning Instructions	Wipe with dry cloth; avoid moisture
Safety Warnings	Do not expose to rain or moisture; unplug during storms
Spare Parts Availability	Contact SPL customer service for replacement drivers or amplifiers
Repairability	Modular design; amplifier and driver replaceable by qualified technician

Frequently Asked Questions - Gorilla GLW-15 SPL

How do I connect the Gorilla GLW-15 to my receiver?

Use a shielded RCA cable from your receiver's subwoofer output to the subwoofer's RCA line input. Alternatively, connect speaker wires from the receiver's speaker terminals to the subwoofer's speaker level inputs if your receiver lacks a dedicated sub out.

What is the recommended crossover frequency setting?

Start with the crossover set to 80 Hz, which is the THX standard. Adjust lower or higher depending on your main speakers' capabilities and room acoustics.

Why is my subwoofer not producing any sound?

Check the power cable, ensure the subwoofer is turned on, verify the volume is turned up, and confirm the receiver's subwoofer output is enabled. Also, check the phase switch and crossover settings.

What does the phase switch do?

The phase switch (0° or 180°) adjusts the timing of the subwoofer's output relative to your main speakers. Set it to the position that gives the strongest, most cohesive bass at your listening position.

Can I place the subwoofer in a cabinet or enclosed space?

It's not recommended. Subwoofers need room to breathe; enclosed spaces can cause boomy, inaccurate bass and overheating. Place it on the floor with at least a few inches of clearance around the port.

How do I clean the subwoofer?

Unplug the unit and wipe the cabinet with a soft, dry cloth. Do not use any liquids or cleaners. The grille can be gently vacuumed with a brush attachment.

What is the warranty period for the Gorilla GLW-15?

SPL typically offers a one-year limited warranty on subwoofers. Check your specific warranty card or contact SPL support for exact terms.

The subwoofer emits a humming noise. What should I do?

A ground loop is often the cause. Try plugging all audio equipment into the same power strip, or use a ground loop isolator on the RCA cable. Also, ensure cables are not routed near power cords.

Can I use this subwoofer in a car audio system?

The Gorilla GLW-15 is designed for home use (AC power). It is not suitable for 12V car systems unless you use a power inverter and ensure proper ventilation.

How do I set the volume level on the subwoofer?

Start with the subwoofer volume at 50% and run your receiver's auto-calibration (if available). Then adjust to taste, ensuring the bass integrates smoothly without overpowering the main speakers.

USER MANUAL Gorilla GLW-15 SPL

Thank you for choosing SPL woofers. Designed and engineered in the USA, this product combines innovative technology with the finest materials to consistently deliver Absolutely State of the Art performance, sound quality, reliability, and value. This SPL product reflects our commitment to offer you unparalleled performance and quality for years of dependable service and listening enjoyment.

Features, Parameters, & Dimensions

Polypropylene Cone

Rubber Surround

2.5" 4-layer VC on Aluminum Former Nickel Plated 8ga. Compression Terminals

Vented T-Yoke Back-plate

Polpropylene Molded Dust Cap

Textured Basket with Voice Coil Cooling

Poly-Cotton Suspension Spider

GLW-10 GLW-12 GLW-15

IMPEDANCE
RE
Fs
QES
QMS
QTS
LE
DIAMETER
SD
VAS
BL
MMS
CMS
SEN
RMS/MAX
CUTOUT DIAM.
MOUNTING DEPTH

Enclosure Dimensions

Included in this manual are a number of different enclosure suggestions. These are by no means the only enclosures to use, but the provide a starting point to determine the correct enclosure for your needs many factors must be addressed (amount of power, vehicle, placement, crossovers, etc) Therefore, as always, SPL recommends that your subwoofer be installed by an authorized SPL dealer.

Enclosure Construction

All enclosures should be made of .75" (3/4") material only. When possible, make the baffle 1.5" (1 12 ) thick and add .75" (3/4") to the depth of the enclosure to compensate. All volumes INCLUDE vent/port and subwoofer displacements. DO NOT change the volume unless you plan on adding a substantial amount of bracing. For added performance, applying a coat of fiberglass resin to the interior walls will greatly improve sealing the enclosure. Adding a thin layer of poly-fill will improve response by smoothing out reflections within the enclosure.

Enclosure Recommendations

GLW-10 GLW-12 GLW-15

SEALED
MIN	.75 CU FT.	1.0 CU FT.	1.5 CU FT.
OPT	1.0 CU FT.	1.5 CU FT.	2.75 CU FT.
PORTED
MIN	1.0 CU FT.	1.5 CU FT.	1.75 CU FT.
PORT WxL	3INCH x 5.5INCH	4INCH x 5INCH	5INCH x 7.8INCH
F3 Hz	34	38	30
OPT	1.5 CU FT	2.25 CU FT.	2.75 CU FT.
PORT WxL	4INCH x 6INCH	6INCH x 7INCH	6INCH x 7INCH
F3 Hz	32	34	28

Black-and-white illustration of a hooded monster with sharp teeth and a pointed mouth, no text or symbols present.