Alpine SWR-8D2 X2 (swr8d2_x2) (2) 1000W Peak 8" Type-R Series

2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers)

(2) 1000W Peak 8" Type-R Series Dual 2 ohm High Performance Subwoofer

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List price $360.00

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$239.92

with warranty

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Arrives by Friday, Dec. 13 to zip 23465

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General Features:

  • 8" Dual 2-Ohm Type-R Series Car Subwoofer
  • Power Handling:
    • Peak: 1000 watts
    • RMS: 150-350 watts
  • Impedance: Dual 2 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. 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


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.
2 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
1-5/8"
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".
83.5 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
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.
40 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.
10.5 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.
0.50
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.
0.54
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.
1.85 + 1.85 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.
7.2

Specials with this Item

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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
4.9
Features
4.8
Design
4.9
Usability
4.8

fortuna california

Overall
Durability
Value
Features
Design
Usability
Good value

August 22, 2014

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

Good speaker all you can expect from an eight inch. No matter how much power you put to it, it's not a 12 inch sub.

22 of 27 found this helpful

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Western Montna

Overall
Durability
Value
Features
Design
Usability
Excellent 8" sub

February 19, 2015

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

I have one of these in my Tacoma. It's defiantly not earth-shattering melt your brain bass, but it is punchy and has great definition in the bass notes. I have no problem with the amount of output that one of these getting 300 watts RMS.

I like the 2 ohm version because you can wire the voice coils in a series and get a 4 ohm load, most 2 channel amps bridge into a 4 ohm load well.

I have it in a sealed box at about .27 cubic feet internal volume, and it sounds great. More than enough output. Perform well in cold weather as well as warm. I've had it for about 6 months now.

The sub is very well made. It has a heavy duty cast basket, nice terminals, and looks great. It was a shame to cover it up with a grill.

I am very happy with this sub and have no desire to try a JL one.

18 of 21 found this helpful

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Nashville TN

Overall
Durability
Value
Features
Design
Usability
Alpine SWR-8D2 Sub Woofer

January 5, 2015

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

These Subs are Dual Voice coil 2 ohm subwoofers "Type R"
These out perform most 12s... You definitely want two of them...
They are a very nice quality, Very clean Bass Not clattery like a lot of 12s and they hit hard... make sure you have the right box and they are properly powered and you will love them...

Alpine - "Feel Your Music"

22 of 29 found this helpful

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lock haven pa.

Overall
Durability
Value
Features
Design
Usability
great little sub.

April 5, 2015

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

This sub sounds very good. Plays low tight and accurate. Great bang for the buck.

14 of 17 found this helpful

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Salem, VA

Overall
Durability
Value
Features
Design
Usability
Very "good" product

April 5, 2016

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

Please read. As I attempted to post a review to the dual 4 ohm version, and Sonic Electronic apparently will not allow a review to go though unless it is 5 starts. All I will say about this sub is that you are warned. Quality is not the Alpine Type-R specialty any longer. Do not attempt to post a bad review when you have an issue either because they will filter it out.

1 of 1 found this helpful

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Monroe NY

Overall
Durability
Value
Features
Design
Usability
BOGO 50% OFF Alpine Type-R SWR-8D2 (Includes 2 Woofers)

June 11, 2018

So far, so good. These little guys produce some decent bass, especially for the size. Im running them at about 280 Watts a piece and haven’t pushed them over 700 each, but they have been handling quite well in their sealed enclosure.

0 of 0 found this helpful

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Brookings, sd

Overall
Durability
Value
Features
Design
Usability
Great equipment

March 8, 2018

Everything about alpine is the best! Would totally recommend this ptoduct!

0 of 0 found this helpful

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$city, $state

Overall
Durability
Value
Features
Design
Usability
Cool

July 21, 2017

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

This sub is not loud. It is an excellent choice for a sound quality build. This sub is the best sounding subwoofer that I have ever heard. Excellent quality. Simply beautiful.

0 of 0 found this helpful

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Shelbyville, TN

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
You won't be disappointed

March 2, 2016

The following review is for SWR-8D2, which is a part of the bundle you are viewing.

I would definitely recommend these to anyone looking for bass in small space. I've built a lot of systems from just 200watts to even things out to 5000watt monsters so I'm pretty jaded, it takes something special to impress me and I must say in a 0.8cf (0.4 per driver) enclosure with a port tuned to 38hertz with just 500watts these little 8" subs made my jaw drop, don't get me wrong your not going to bass box with a well built 12" set up, they're not going to reach down as low as 15's but set um up right and you won't be disappointed. Worth double what Sonic sell them for easy.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

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

Your Price $49.95

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 $73.99

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

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

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 $26.99

1 2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers) Subwoofer

Mono Amp

Mono Amp - Option 1

2 Channel Amp - Bridged

2 2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers) Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers) Subwoofers

Mono Amp

Mono Amp - Option 1

4 Channel Amp

4 2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers) Subwoofers

2 Channel Amp

4 Channel Amp

Product Summary

Manufacturer

Model Number

SWR-8D2 X2

Weight

19.00lbs

Internal SKU

swr8d2_x2

Internal Product ID

145063

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: 2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers)

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2 Pack Alpine Type-R SWR-8D2 (Includes 2 Woofers)

(2) 1000W Peak 8" Type-R Series Dual 2 ohm High Performance Subwoofer

$239.92

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Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

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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!

$49.95

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

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