Alpine Type-R SWR-8D4

1000W Peak 8" Type-R Series Dual 4 ohm High Performance Subwoofer

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    List price $180.00

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    Arrives by Wednesday, July 26 to zip 20147

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    10% Off a Sound Dampening Kit with Your Subwoofer Purchase!

    Save 10% when you add an NVX SDTK20 Sound Dampening Trunk Kit to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

    6.00

    72376

    1219

    Alpine Type-R SWR-8D4

    $119.95

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    NVX SDTK20 - 90mil 2.3mm THICK

    $59.99

    Special Price $53.99 ($59.99 if purchased separately)

    NVX SDTK20 - 90mil 2.3mm THICK

    • Eliminates Road Noise
    • 2.3mm (90.55mil) thick for better performance
    • Quiets Vibrations
    • Stops Rattles • Increases SPL
    • Reduces Heat
    • Simple To Install
    • Easy To Form Aluminum
    • Four Step Peel and Stick Installation
    • Five 18" x 32" Pieces

    (Offer 1 of 1)

    Combined Total Price

    $173.94

    You Save $6.00

    Alpine Audio Store

    General Features:

    • 8" Dual 4-Ohm Type-R Series Car Subwoofer
    • Power Handling:
      • Peak: 1000 watts
      • RMS: 150-350 watts
    • Impedance: Dual 4 ohms
    • Reinforced Parabolic Cone Structure with Poly-Mica Dust Cap & Pulp-Kevlar Cone
    • Durable HAMR Santoprene surround
    • Nomex Progressive Conex spider
    • Compound Radius Curve pole geometry
    • Oversized 1.6", High-Temperature, 4-Layer Dual Voice Coil
    • 52 oz. Double Strontium magnet motor structure
    • Frequency response: 30-200 Hz
    • Resonance Frequency (Fs): 40Hz
    • Excursion: 12mm
    • Top-mount depth: 4-1/2"
    • Sensitivity: 83.5dB
    • Subwoofer Grilles Sold Separately - Alpine KTE-8G
    • Authorized Internet Dealer
    • 1-year Manufacturer's Warranty


    Product History:

    Alpine SWR-8D4 thumbnail
    (newest, current model)
    Alpine SWR-843D thumbnail
    (previous model, replaced by Alpine Type-R SWR-8D4)

    Subwoofer Specifications

    Subwoofer Series
    Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
    Type-R (Alpine)
    Subwoofer Size
    Refers to the diameter of the subwoofer, measured in inches.
    8"
    Peak Power Handling
    Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
    1000 watts
    RMS Power Handling
    The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
    350 watts
    Voice Coil(s)
    Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
    Dual
    Impedance (Per Voice Coil)
    The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
    4 ohms
    Voice Coil Diameter
    Diameter of voice coil, usually measured in inches.
    1-5/8"
    Frequency Response
    The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
    30 - 200 Hz
    Sensitivity
    An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
     
    Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
    40 dB
    Xmax (millimeters)
    Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
    12 mm
    Subwoofer Design
    This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

    Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

    Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

    Round / Circle
    Main Cone Color
    This is the color of the speaker's or subwoofer's cone.
    Black
    Woofer Composition
    Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
    Kevlar Reinforced Pulp (Paper)
    Woofer Surround
    A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
    Santoprene Rubber
    Magnet Structure
    Defines the overall structure of the subwoofers magnet.
    Double Stacked
    Subwoofer Grille
    Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
    No
    Re-Cone Kit Available
    Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
    No

    Recommended Enclosure Specifications

    Recommended Enclosure Type
    This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

    Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

    Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

    Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

    Ported / Vented
    Sealed
    Minimum Sealed Box Volume
    This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.25 cubic feet
    Optimum Sealed Box Volume
    This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.30 cubic feet
    Maximum Sealed Box Volume
    This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.50 cubic feet
    Minimum Ported Box Volume
    This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.5 cubic feet
    Optimum Ported Box Volume
    This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.70 cubic feet
    Maximum Ported Box Volume
    This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
    0.70 cubic feet
    Top-Mount Depth
    The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
    4-1/2"
    Cutout Diameter
    The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
    6-15/16"
    Shallow Mount Installation
    This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

    Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

    No

    Electromechanical Parameters

    Free-Air Resonance (Fs)
    The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
    42 Hz
    Equivalent Compliance (Vas)
    This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
    10.3 liters
    Total Speaker Q Value (Qts)
    This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
    0.57
    Electrical Q Value (Qes)
    The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 – 10.
    0.62
    Electrical Resistance of Voice Coil (Re)
    Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
    3.7 + 3.7 ohms
    Mechanical Q Value (Qms)
    This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
    6.8

    What is in the box?

    WITB: Subwoofers
    A detailed list of the equipment (main product and accessories) included with your subwoofer. If special accessories are included in the box, they will be listed and detailed below the main list of equipment.
    Paperwork
    Paperwork included with the product.
    Other Accessory #1
    Standard accessories are included in the main list above; however, this line provides specific details on an additional, unique accessory that is included with the product.
    Other Accessory #2
    Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
    Other Accessory #3
    Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
    Other Accessory #4
    Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
    Other Accessory #5
    Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.

    Warranty and Return Policy

    Parts Warranty Duration
    1 year
    Labor Warranty Duration
    1 year
    Warranty Provider
    Manufacturer

    Summary of Customer Ratings & Reviews

    Rating Distribution

    5 Star
    100%
    4 Star
    0%
    3 Star
    0%
    2 Star
    0%
    1 Star
    0%

    Average Attribution Rating

    Durability
    4.7
    Value
    5.0
    Features
    4.8
    Design
    5.0
    Usability
    4.8
    mike

    Mckinney, TX

    Overall
    Durability
    Value
    Features
    Design
    Usability
    cant be beat

    February 25, 2014

    I was able to replace my factory blown sub in my 2002 Tahoe with this one. It fit right in the factory box behind trim panel. I added a JVC KS-AX3201D cause I didn't want to go crazy. And I couldn't be happier.

    18 of 22 found this helpful

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    scottyd

    Bushnell, Florida

    Overall
    Durability
    Value
    Features
    Design
    Usability
    Wow

    April 19, 2014

    Im running this sub in a .7 cubic foot ported box in a single cab ford ranger. Just in the break in period at half volume, you can tell this thing is nasty! Im pushing it with a sound ordnance M1500, and its power hungry. For sure recommend this. Cant wait to crank it up!

    14 of 17 found this helpful

    Was this review helpful to you?

    Mandy

    D'Iberville, MS

    Overall
    Durability
    Value
    Features
    Design
    Usability
    GREAT CUSTOMER SERVICE

    March 16, 2015

    I love this company....very easy to deal with and never rude. Either I ordered the wrong part or they sent me the wrong thing. I called, took me a little time to get through. But my problem was solved instantly no if''s and's or but's (lol) I would recommend Sonic Electronic to anyone.....Thanks guys.....M Youngblood

    11 of 13 found this helpful

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    Anthony

    Macomb, MI

    Overall
    Durability
    Value
    Features
    Design
    Usability
    Powerful little sub

    January 10, 2016

    I bought this sub ti fit into the factory sub in-closer of a 2014 Jeep Wrangler Unlimited. It is a lot deeper then the factory speaker so you will need a spacer to make it fit.
    I have a Polk Audio 5 channel amp with 400 watts of power going to it at 2 ohms. It could handle a lot more power. Don't be afraid to give it some juice.
    I am very happy with this purchase. It is night and day from the factory sub hooked up to the same amp.
    It is pretty good for Rock music.
    I don't play a lot of Rap so I really cannot comment on that.
    I do not thank you will be disappointed as long as you give it enough power.
    I would definitely recommend it!

    3 of 3 found this helpful

    Was this review helpful to you?

    Chad

    Oro valley, AZ

    Overall
    Durability
    Value
    Features
    Design
    Usability
    Cant go wrong with Alpine

    October 25, 2016

    Solid construction and fit perfectly in my tight space for under the back seat of my hummer. The price from Sonic is unbeatable. I only gave it 4 stars for durability because I have only had it a couple of months I can't really say its durable until I have had it for a while and I rarely drive the vehicle so it doesn't get pushed.

    0 of 0 found this helpful

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    Matt

    Pocatello, id

    Overall
    Durability
    Value
    Features
    Design
    Usability
    Great subwoofer!

    June 22, 2016

    I put this subwoofer in a small sealed fiberglass enclosure. The type r subs have great specs for their small size. The cutout diameter and mounting depth are smaller than most other 8" subs, but they still perform wonderfully. I am particularly impressed with the surround design. It allows for a lot of excursion. These can take a decent amount of power. I also have a kicker comp rt sub that i tried in the same enclosure. I prefer the alpine.

    0 of 0 found this helpful

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    Accessory Tools and Products

    Accessories added

    25 ft. of Streetwires 12 Gauge Speaker Cable

    You'll need speaker wire to hook up that new subwoofer!

    Your Price $36.99

    20 Square Feet of Sound Dampening Material

    NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

    Your Price $59.99

    Stinger Sound Dampening Trunk Kit

    Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

    Your Price $64.99

    Dynamat Sound Dampening Trunk Kit

    Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

    Your Price $99.99

    2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

    Universal rubber roller to make it easy to install sound dampening.

    Your Price $7.99

    Car Stereo and Speaker Installation Tool Kit

    Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

    Your Price $14.99

    Five Piece Installer Panel Removal Tool Kit

    Installer's Panel Removal Installation Tool Kit for Car Stereo, Speakers and Car Audio Installs

    Your Price $11.99

    12 oz. Can of Adhesive Spray

    Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

    Your Price $8.99

    Spring Post Terminal Cup

    Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

    Your Price $3.99

    Gold Plated Dual Terminal Banana Plug Connector

    Enables an expandable, secure connection accepting up to 8 gauge wire.

    Your Price $1.99

    Scosche SPL Meter

    Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

    Your Price $33.95

    1 Alpine Type-R SWR-8D4 Subwoofer

    Mono Amp

    2 Channel Amp - Bridged

    2 Alpine Type-R SWR-8D4 Subwoofers

    Mono Amp

    Mono Amp - Option 1

    2 Channel Amp

    2 Channel Amp - Bridged

    4 Channel Amp - Bridged

    3 Alpine Type-R SWR-8D4 Subwoofers

    Mono Amp

    4 Channel Amp

    4 Alpine Type-R SWR-8D4 Subwoofers

    Mono Amp

    2 Channel Amp

    2 Channel Amp - Bridged

    4 Channel Amp

    Browse 2 questions and 12 answers
    Hide answersShow all answers | Sort by
    Why did you choose this?
    Sonic Electronix Store
    Top rated item at a good price.
    Kenneth W on Nov 21, 2015
    Fan of this line since college...just knowing that my sound matched with HU and Amp from Alpine is excellant
    Roderick s on Jan 5, 2015
    Ive always wanted to do a system with 8"s and it was a good deal for alpine type Rs, great subs.
    joseph m on Oct 31, 2015
    To install in F250.
    Clint B on Sep 17, 2014
    Is there a protective grill for it?
    Ted U on Dec 8, 2015
    Best Answer: Aleksandar is correct. There is a protective grill (sold separately) for this subwoofer. It has a unique method of installation with all hardware supplied with the speaker grille kit. Expensive for what is is, but looks much better than most universal grilles which could be adapted to fit.
    Alpine KTE-8G
    Alpine KTE-8G
    Reply · Report · Darryl E on Dec 9, 2015
    · Add Answer · I Have This Question Too (0)

    Product Summary

    Manufacturer

    Model Number

    SWR-8D4

    UPC

    793276012371

    Weight

    9.50lbs

    Internal SKU

    swr8d4

    Internal Product ID

    72376

    Sonic Electronix Wiring Guide

    Wiring Diagram Legend

    Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

    Product Name: Alpine Type-R SWR-8D4

    Item Added to Cart

    Alpine Type-R SWR-8D4

    1000W Peak 8" Type-R Series Dual 4 ohm High Performance Subwoofer

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    25 ft. of Streetwires 12 Gauge Speaker Cable

    You'll need speaker wire to hook up that new subwoofer!

    $36.99

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    20 Square Feet of Sound Dampening Material

    NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

    $59.99

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    2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

    Universal rubber roller to make it easy to install sound dampening.

    $7.99

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