SW8D2 - Subwoofer ALPINE - Free user manual and instructions

Product type	Subwoofer (subwoofer)
Brand	Alpine
Model	SW8D2
Speaker diameter	20.3 cm (8 inches)
Impedance	Dual 2-ohm voice coil
Recommended RMS power	300 W
Peak power	1200 W
Frequency response	30 Hz – 200 Hz
Sensitivity	84 dB (1 W / 1 m)
Mounting depth	11.4 cm (4.5 inches)
Cone material	Reinforced polypropylene
Suspension	Rubber
Protective grille	Included (front cover)
Included accessories	Mounting brackets, screws, hex keys, adjustable feet
Compatible amplifier	Alpine R-A75M or S-A60M (sold separately)
Recommended use	Vented enclosure for trucks
Installation	Requires specialized skills – recommended by an Alpine dealer
Maintenance	Clean with a dry cloth; avoid moisture and dust
Safety	Secure attachment to vehicle; do not drill near fuel tank or wiring
Repairability	Replacement parts available from authorized dealers

Frequently Asked Questions - SW8D2 ALPINE

What is the recommended RMS power for the SW8D2?

The recommended RMS power is 300 W per speaker. Use a compatible amplifier like the Alpine R-A75M or S-A60M.

What impedance does the SW8D2 subwoofer have?

The SW8D2 has a dual 2-ohm voice coil, allowing series (4 ohms) or parallel (1 ohm) configurations.

Is the enclosure shipped with an amplifier?

No, the amplifier is sold separately. The manual recommends the Alpine R-A75M or S-A60M models.

What tools are needed for installation?

The required tools are a hex key (supplied) and optionally a power drill with low torque setting.

Can I install the SW8D2 in any vehicle?

The manual provides specific settings for certain trucks (F-150, Silverado, Wrangler, RAM). For other vehicles, consult a professional installer.

How to adjust the amplifier for the SW8D2?

Recommended settings are: Gain at 1 o'clock, low-pass filter at 70 Hz, bass equalization at 0, and subsonic filter at 30 Hz if available.

What to do if the enclosure gets wet or exposed to moisture?

Avoid any exposure to water. If it happens, dry the device immediately and check its operation. Moisture can cause fire or damage.

Is the SW8D2 compatible with speakers of other brands?

It is designed to be used with Alpine amplifiers, but can work with any amplifier meeting the power and impedance specifications.

How to clean the subwoofer?

Clean the enclosure with a dry, soft cloth. Do not use chemicals or water, as they could damage the speaker.

The manual says to use the supplied hex keys. Why?

The supplied hex keys allow tightening the screws to the appropriate torque without damaging the threads or inserts. Overtightening can break parts.

USER MANUAL SW8D2 ALPINE

R/S-DB8V-TRK Truck Enclosure Installation Manual Compatible with the following models:

R2-W8D2

S-W8D2

Technical line drawing of a mechanical component with mounting holes and internal channels (no text or symbols)

Introduction

Congratulations on purchasing this truck enclosure. This installation manual is designed to take you through the step-by-step installation of the 'R' or 'S' Series Dual 8" Subwoofer Vented Enclosure for Trucks. Please familiarize yourself with the owners manual and if you still have additional questions please contact our support team at 1-800-TECH-101.

Note: To ensure safe use, Always follow these precautions.

The installation of this product requires specialized skills and experience. We recommend that you have the product installed by an Alpine authorized dealer.

Before you use this product, be sure to carefully read this installation manual so that you can use the product correctly. Failing to do so could lead to damaged equipment or an accident. Alpine Electronics bears no responsibility for problems that arise as a result of failure to follow the instructions in the manual.

● Make sure enclosure is secured to the vehicle. Failing to do so can lead to electric shock, injury or damage to equipment.
- When making a hole in the vehicle body, be careful to avoid damaging pipes, the fuel tank, electrical wiring, and the like. This kind of damage could lead to an accident or fire.
- Do not install the product where it may be exposed to water or in a place with high levels of humidity or dust. Doing so could lead to fire or damaged equipment.
- Start all screw threads by hand and avoid overtourqing screws, failure to do so may damage your equipment.
● Matching Alpine mono amplifiers are sold separately - check with an Alpine authorized dealer.

Recommended Amplifier settings

R-A75M amp S-A60M amp

R-ATSM SAIN LP FILTER BIOS UL SUBSTONE ASLINE

Gain=1 o'clock position

LP Filter=70Hz

Bass EQ=0 (Off)

Subsonic Filter=30Hz

S-ASDM INPUT LEVEL INPUT PRE OUT (0) GAM LP ACTM MAX 10 REMOTE RASS CONTROL

Gain=1 o'clock position

LP Filter=70Hz

Bass EQ=0 (Off)

(Note: If available with your HU/DSP -

We recommend a Subsonic filter, if possible with Fc=30Hz @-24dB/Oct.)

Tools Required

Hex Key Driver (2pcs. included) Power Drill with a Low Torque Setting (Optional)

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Note:
Use Hex Key Drivers for Enclosure feet, Front/Rear brackets and amp tray: Failure do so could result in damage to the enclosure.

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Note:
Power Drill for Subwoofer and Amplifier installation only.

Accessory List

Driver Side Enclosure Passenger Side Enclosure

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Front/Rear Link Bracket Front Cover/Trim Bars

Technical line drawing of two bracket components labeled 'Front Rear' (no other text or symbols)

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Left/Right Amp Tray Bracket Stacking Feet for Enclosure

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6 Standard Stacking Feet (Rubber/Washer/Rubber)
2 Pair Extra Parts (Rubber/Washer)

1 Installation screws are temporarily installed in both driver and passenger side enclosures. Remove all screws to prepare for assembly.

Stacking feet screws Rear bracket screws Stacking feet screws Driver side Passenger side Front bracket screws Front bracket screws Amp bracket screws

3 Place enclosures upside down on a flat surface and set to required width. Align rear link bracket with threaded inserts and secure bracket using supplied M5x20mm screws (4pcs.) and M5x12mm washers (4pcs.).

Caution: To avoid damage to the enclosure use supplied Hex Key driver for when installing the rear bracket.

See Table 1 Rear bracket

5 Using the supplied M5x60mm screws (6pcs.) and M5x20mm washers (6pcs.) install feet as shown. Additional feet spacers are included to accommodate vehicles with uneven floors, floor mats etc. - see fitment chart.

Caution: To avoid damage to the enclosure use supplied Hex Key driver for when installing the enclosure feet.

Technical line drawing of a mechanical housing or enclosure with mounting holes and a central circular component (no text or symbols)

2 If applicable, attach inner amp tray brackets using supplied M5x20mm screws (4pcs.) and M5x20mm washers (4pcs.).

Note: Amp tray brackets can be trimmed for narrow applications. Amp tray will not be used in some applications - See fitment chart. If Amp brackets are not installed, the 4 mount screws should be left snugly tightened in both enclosures.

Caution: To avoid damage to the enclosure use supplied Hex Key driver for when installing the amp brackets.

Amp tray brackets

4 Rotate assembly rightside up and attach front link bracket using supplied M5x20mm screws (4pcs.) and M5x20mm washers (4pcs.) as shown.

Caution: To avoid damage to the enclosure use supplied Hex Key driver for when installing the front bracket.

Front bracket

6 Place mono amplifier on amp tray and mark the mount holes. Then drill and mount with appropriate size screws (not included).

graph TD
    A["Top Box"] --> B["Central Box"]
    B --> C["Bottom Box"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333

7 Align front cover and trim bars, then install with supplied M5x20mm screws (4pcs, 4mm hex drive).

Front cover Trim bars

Recommended configuration for specific vehicles

Table 1: Recommended vehicle settings

Vehicle Width	Inner Foot		Outer Foot (front)	Outer Foot (rear)	Amp Tray Notes
2015+ F-150 51” (max)	yes yes yes	yes
2018+ Silverado/Sierra	51” (max)	yes yes yes
2007+ Wrangler 40”	(min) no yes	yes no			Remove inner foot and install in outer location
2018+ RAM 51” (max)	yes yes no	yes

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Introduction

Two isometric line drawings of L-shaped pipes with labeled dimensions (4mm x 3mm), no other text or symbols present.

Remarque :

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Remarque :

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Supports avant/arrière Couvercle avant/barres de garniture

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Technical line drawing of a rectangular electronic component with mounting holes and internal compartments (no text or symbols)

Two identical line drawings of a structural frame or support structure, each with a curved base and two vertical supports (no text or symbols)

Simple line drawing of stacked cylindrical objects (no text or symbols)

6 pieds de superposition standard (caoutchouc/ondelle/caoutchouc)

Technical line drawing of a mechanical housing or enclosure with mounting flanges and a central circular component (no text or symbols)