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2 Pack of Infinity Reference 860W

Pair of 8" Single 4 ohm Reference Series Car Subwoofers

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List price $199.90

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To Infinity, and Beyond Your Normal Woofer

Don’t let this 8 inch Infinity Reference subwoofer fool you; it has no problems pumping out deep, clean bass when you’re tight on space. At 1000 watts of peak power, it takes the heat without stepping out of the kitchen. All of this without sacrificing sound quality or cutting sensitivity.

Infinity’s product quality and excellence stem from their passion for music. This fact is evident in each of their lines, with no exception to their Reference Series subwoofers. Whether you listen to rock, hip-hop, jazz, country or anything else, these woofers will shine through with every note. High-gloss polypropylene woofer cone is lightweight which assures maximum efficiency which produces high output with modest amplifier power. This in no way means the Reference woofers don’t have a sound quality side, far from it. Sound quality is the name of Infinity’s game, and every beat will be smooth, crisp, and hard hitting. The large-roll rubber surround absorbs distortions that travel through the cone, ensuring clean bass response. Vented polepieces help cool the motor structure which allows for an increase in power handling. Engineering at Infinity is state-of-the-art and a great deal of computer aided design software is used to devise their products. This commitment shows in all of their product lines, and with such a good reference, it’s a no brainer.

General Features:
  • Two 8" Single 4 Ohm Reference Series Subwoofer
  • Power Handling:
    • Peak: 2000 watts per pair / 1000 watts each
    • RMS: 500 watts per pair / 250 watts each
  • Impedance: Single 4 Ohm
  • High-gloss polypropylene woofer cone ensures maximum woofer efficiency
  • Large-roll rubber surround absorbs distortions
  • Vented pole pieces provide additional cooling of the motor
  • 2" Voice coil
  • Frequency response: 30-400 Hz
  • Sensitivity: 91 dB
  • Mounting Depth: 5-3/16"
  • Cutout Diameter: 7-5/16"
  • 1-year warranty

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Reference (Infinity)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
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.
250 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.
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.
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 - 400 Hz
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".
91 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.
13 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.
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.
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.
Magnet Structure
Defines the overall structure of the subwoofers magnet.
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.
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.

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
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.
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.
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.
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.
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.


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.
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.
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.
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.
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.
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.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


columbus ga

Still going strong after 2 years

July 30, 2014

Purchased a pair of these around 2 years ago and use a 1000w Punch amp bridged. These speakers have taken a beating and still sound as good as new. For the money, you can't beat these Infinity's.

8 of 14 found this helpful

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Santa Cruz

The best for 8s

July 23, 2012

These subs rock i had them for a week or two and no Problems.
Pros:great clean sound and deep bass.
Cons:kinda big and heavy but other than that good powerful subs.

6 of 11 found this helpful

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Las Cruces,NM

Can hit you with a jab than an uppercut, followed by a knockout

December 27, 2010

These are really good sounding for 8's. Well built and pretty heavy. Also take some good power. You get plenty of thump surprisingly from them, especially if you like rock, country or techno. Rap is hittin' but not enough "oomph" if you really want to feel them. I opted to use them as my midbass drivers in my doors since 4 12's do my lows. Of course a lot of work is done to custom fit them. Hands down they still rock and rumble off my old Hifonics ZX1000 pushing 250 watts per channel. Infinity Audio, If you like your music loud & clear and like to put some power in to the speakers, this is the brand for you.

8 of 18 found this helpful

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Springfield, MO

Infinity 860w

January 11, 2014

Got 2 of these in my Marquis along with 2 Klipsh 8" subs powered by an audiopipe apsm 1300 with a second 850 amp battery. I'm lovin It! makes my outside mirrors shake like CRAZY! Great sound quality and bass from these guys at a fraction of the price of an SA8.

7 of 21 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 $44.95

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 $59.99

Dynamat Sound Dampening Trunk Kit

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

Your Price $94.95

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 $69.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

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

Your Price $1.99

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 $16.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

Scosche SPL Meter

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

Your Price $21.99

1 2 Pack of Infinity Reference 860W Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 2 Pack of Infinity Reference 860W Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 2 Pack of Infinity Reference 860W Subwoofers

4 Channel Amp

4 2 Pack of Infinity Reference 860W Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 6 questions and 10 answers
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Why did you choose this?
Sonic Electronix Store
Excellent customer reviews; priced same as Amazon
Nate S on Mar 31, 2015
Reviews showed that they were a good product, and this site has a great price on them
Donovan S on Dec 8, 2014
I never seen a 8 inch subwoofer have so many positive reviews!
Landrie H on Feb 5, 2015
fits in tight places
Hanne B on Aug 14, 2014
What would be a good cost affective amp to match to this sub pair? Would these be best suited to a sealed or ported enclosure for the trunk of a small car? Thank you.l
A shopper on Jan 5, 2015
Best Answer: Hello,

Being that a pair of 860W is asking for a modest ~500w RMS @2ohms, you've already set yourself up to get into a 'cost affective amp to match'. With that said, the Kenwood KAC-5001PS , Rockford Fosgate R500X1D, or Pioneer GM-D8601 will make a great match.

In regards to enclosure; It comes down to Your preference. The subs are designed to work well in Either type. Use the link below to read up on enclosures, and see what best fits You.
Rockford Fosgate R500X1D
Rockford Fosgate R500X1D
Kenwood KAC-5001PS
Kenwood KAC-5001PS
Pioneer GM-D8601
Pioneer GM-D8601
Reply · Report · Customer SStaff on Jan 5, 2015
· Add Answer · I Have This Question Too (0)
Can I run a pair of these off a Kicker CX300.1? Certificate shows 329 Watts Rms. Effectively giving each about 165. Thanks
Chris on Mar 29, 2015
Best Answer: Thanks
Reply · Report · Chris on Mar 30, 2015
· Add Answer · I Have This Question Too (0)
I had asked about the enclosure question on 1/5 which you responded to and you advised Atrend 8DQV.

I looked at the box and total volume is 1.8, where as two of these subs would only require 1.2? Does this pose an issue. Will sub not perform and sound as it should with more volume than it requires? Also I noticed in the photos no divider between between the two mounting holes? Shouldn't each chamber be isolated from the other?
A shopper on Jan 8, 2015
Best Answer: Hello,

The enclosure was suggested, because it is the Closest to spec that we carry. After displacement, it will provide with ~1.5 per subwoofer. Going slightly larger is often better than risking a smaller volume. By no means are we saying its the PERFECT fit, as that will be impossible in the form of a Pre-Fab enclosure. If you seek the PERFECT match, then we highly suggest a Customer Enclosure, built specifically to the specs of the subwoofer.
Moreover, No divider between the two does not pose a problem; if it did, the enclosure would not exists. But to your concern, 'Shared Chamber' is still a very common configuration, and simply provides a bit more (marginally!) overall SPL, and often provides a smaller footprint.
Reply · Report · Customer SStaff on Jan 10, 2015
· Add Answer · I Have This Question Too (0)
Thank you for the answer to my above question, do you sell a ported dual 8" enclosure that matches closely to the specs this pair require volume wise? If so, can you advise model or link to it. Thanks.
A shopper on Jan 5, 2015
Best Answer: Hello,

The Atrend 8DQV will work very well.
Atrend 8DQV
Atrend 8DQV
Reply · Report · Customer SStaff on Jan 5, 2015
· Add Answer · I Have This Question Too (0)
Will these work as a good replace for bazooka tube 8" speakers?
Calvin J on Apr 16, 2015
· Add Answer · I Have This Question Too (0)

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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 of Infinity Reference 860W

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