Best 6.5″ Subwoofer: The Steady Eddie Sub We All Love

Is something missing in your car audio? It might just be a subwoofer. While there are numerous sizes of subwoofers, one of the most used is the convenient 6.5″ subwoofer. If you’ve already started shopping, you know how many options there are out there. So many that the task of selecting one quickly becomes overwhelming.

No worries! We’ve cut through all the noise for you and put together a list of the best 6.5″ subwoofer options. Just pick your favorite and turn up the tunes.

Best 6.5” Subwoofer Reviews and Comparisons

Skar Audio IX-8 D2 8 6.5″ Subwoofer

Product Highlights

This speaker uses an air-cooling design to improve lifetime and performance without increasing cost or weight.


  • Speaker weighs 7.3 lbs
  • Up to 300w power
  • Mounting depth 4.17”
  • 83.2 dB sensitivity

What We Like About Skar Audio IX-8 D2 8

Skar puts exceptional care into the quality of its materials, making this speaker more durable and efficient than the competition

What We Don’t Like About Skar Audio IX-8 D2 8

This speaker does not come with an enclosure or wiring, requiring the buyer to put in all installation and accessory work themselves.

Memphis Audio MJM644 MOJO

Product Highlights

This speaker is designed with a more compact frame that makes it easy to integrate into a vehicle’s audio system.


  • Up to 1400w power
  • Four ohms resistance
  • Compatible with 5” mounting frames
  • More solid back end than others to improve forward sound projection

What We Like About Memphis Audio MJM644 MOJO

This speaker is designed with two distinct sections; the back one is narrower than the front, allowing it to be fitted to 5” speaker mountings as well as the ordinary 6.5”.

What We Don’t Like About Memphis Audio MJM644 MOJO

The different widths require careful attention to be properly mounted, which tends to make it harder to mount in car doors or a stationary cabinet.

Earthquake Sound SWS 6.5″ Subwoofer

Product Highlights

This set comes with two speakers to let you create a stereo subwoofer effect on any sound system to which you can hook it up.


  • Two speakers in one set
  • Inverted cone model
  • Four ohms of resistance
  • Up to 200w power

What We Like About Earthquake Sound SWS

This speaker’s narrow profile and easy wiring adapters make them the ideal choice for upgrading a car door’s speakers.

What We Don’t Like About Earthquake Sound SWS

Two speakers naturally mean added expense, and this set is priced at more than double some of the single-speaker models.

Kicker CompRT Single

Product Highlights

This speaker is weatherproofed for use in outdoor productions and made with a durable rubber lining that keeps it safe through the wear and tear that can happen as you work to get it set up.


  • Up to 300w power
  • High-temperature tolerance
  • Weatherproofed exterior
  • Propylene cone with injected molding

What We Like About Kicker CompRT Single

This speaker’s toughened components make it usable anywhere, whether in a shallow car mount or as an addition to an outdoor speaker array.

What We Don’t Like About Kicker CompRT Single

The manufacturer recommends using this speaker only inside the vehicle doors or when mounted in sealed boxes with foam injection to hold it steady.

DS18 Elite Z6

Product Highlights

This speaker is rated for nearly double the maximum power of similar models to allow for added volume and precision in sound reproduction.


  • 600w maximum power
  • Dual voice coil for tandem broadcasts
  • Refined ferrite magnetic slug
  • Reinforced with Kevlar webbing

What We Like About DS18 Elite Z6

This speaker is built to handle higher power reproductions and has a rugged frame that lets it shake off dings, dents, and drops with ease.

What We Don’t Like About DS18 Elite Z6

This speaker’s mounting options are limited and there are no brackets or adapters included with the device.

Sundown Audio SA 6.5″ Subwoofer

Product Highlights

These speakers are made with exceptionally solid backing to allow them to be used with no enclosures of any kind.


  • Up to 200w maximum power
  • Four ohms resistance
  • Fully stitched textile surround
  • Set of two

What We Like About Sundown Audio SA

Although they look the same as some others from the outside, these speakers are built solidly and internally braced to provide great sound with no need for a mounting or enclosure.

What We Don’t Like About Sundown Audio SA

Although the functional speaker body is still 6.5”, there is an extra quarter-inch around the ribbing that makes these speakers 6.75” wide when looked at head-on.

Final Verdict For Best 6.5″ Subwoofer: Kicker CompRT Single

These subwoofers not only have great sound reproduction, they are also durable enough to stand up to anything that might come along – not only scrapes or dents but actually damaging blows too. That resilience translates into reliability for the product, making it outlast the competition and saving you the long-term cost of buying a less resilient model and then having to replace it sooner.

KICKER CompRT67 6.75-inch (165mm) Subwoofer, DVC, 2-Ohm, 150W
Naturally, these speakers aren’t going to be for everyone – nothing is – but they are weatherproofed, giving them a distinct advantage over the other models presented. While most of them are supposed to be for vehicles or home systems, the Kicker CompRT Single can be used inside or out and in nearly any weather, making it more functional and less likely to be ruined if it starts to drizzle.

Buyer’s Guide

Getting a subwoofer should start with a measuring tape – check how large of a space you have to work with, and how many subwoofers you want to mount before proceeding to look at the speakers themselves. Remember that subwoofers are three-dimensional, so you will need to come up with a complete list of measurements for the space in question.

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