Energy ESW-M6

Ultra-compact powered subwoofer

  • Energy ESW-M6


  • Energy ESW-M6

    Front with grille off

  • Energy ESW-M6

    Shown next to the larger ESW-M8

  • Energy ESW-M6

    Shown with grille on

Item #: 732ESWM6

Review Summary

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Original price $279.99
We recommend this similar item, or shop all Powered Subwoofers

Our take on the Energy ESW-M6

by Kristen Schaub

Why add a powered subwoofer?

A powered subwoofer gives you bass you can feel as well as hear. Our customers love the depth and impact their subs add to music and movies. We hear comments like "it brings out sounds I didn't know existed in discs I've watched a million times." Powered subwoofers aren't just for big bass that rattles your picture frames; they can also deliver tight, accurate lows. If you haven't shopped for a powered sub in a while, you might be surprised at how small they get. Look for an ultra-compact model if you want to tuck your sub away under an end table or in a corner.

What's better than bass you can feel? How about a subwoofer you barely see? The ESW-M6 provides up to 800 watts of room-thumping bass from a cabinet that measures less than a cubic foot. You'll be impressed by the clean, punchy lows the 6" woofer and dual 6" passive radiators add to your favorite music, games, and movies. Plus, the woofer cones use proprietary Ribbed Elliptical Surrounds™ to increase efficiency and fight sound-muddying distortion.

Controls on the back of the cabinet make it a cinch to add as little or as much bass as you like, and to seamlessly blend the sub in with the rest of your system. The high-gloss finish gives this sub a polished look that complements most flat-panel displays.

See more info on this item


  • 200-watt RMS amplifier (800 watts peak)
  • 6" front-firing woofer and dual 6" passive radiators
  • anodized aluminum cones with Ribbed Elliptical Surrounds™
  • frequency response 42-200 Hz (±3dB)
  • continuously variable 50-200 Hz crossover
  • adjustable phase control
  • line-level/subwoofer and speaker-level inputs
  • auto on/off mode
  • high gloss black finish
  • 8"W x 8-5/16"H x 10-11/16"D
  • weight: 10.1 lbs.
  • warranty: 5 years speaker, 3 years amp
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Enclosure Passive Radiator
Video Shielded No
Woofer Size (inches) 6
Woofer Composition Anodized aluminum
Firing Direction Front
Wireless No
Preamp-Level Inputs 2
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq 50-200Hz
High-Pass Crossover Freq None
Phase Switch Yes
Amplifier Output (watts) 200
Frequency Response 42-200 Hz
Height (inches) 8-5/16
Width (inches) 8
Depth (inches) 10-5/8
Weight 10.1 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 3 Years
Amplifier Labor Warranty 3 Years
Product Research
What's in the box?

Download owner's manual

  • ESW-M6 powered subwoofer
  • 6' AC power cord (polarized C7 plug)
  • Cleaning cloth
  • Owner's Manual

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.



Single Active/Dual Passive Design: The Energy ESW-M6 has three 6" black anodized aluminum cones (one woofer and two passive radiators). The woofer is driven by an efficient 200 watt (800 watt dynamic power) amplifier. Together, the woofer and passive radiators deliver pure, powerful, accurate bass for your music, movies, and games.

Surrounds: The front-firing woofer and side-firing passive radiators each have inverted Ribbed Elliptical Surrounds. This design eliminates surround distortion, causing the subwoofer to play lower with greater output and fidelity.

Finish: The furniture-grade enclosure is hand finished to a high-gloss piano black lacquer finish to ensure durability.


Volume Control: The rotary volume control lets you set the loudness of the subwoofer relative to the rest of the speaker system. After the volume is set, the subwoofer's volume can be controlled along with the other speakers by the master volume control on the receiver or preamplifier.

Low-pass Filter: The ESW-M6 has a built-in 50-200 Hz, continually-variable low-pass filter that allows perfect blending with your other speakers. If desired, you can bypass the low-pass filter so you can use the crossover built into your A/V receiver or surround processor.

Phase Control: The unit's rotary phase control lets you fine tune the subwoofer's phase from 0° to +360°. A mark is provided at 180°.

Power Modes: The subwoofer features three power modes: Off, On, and Auto. The main power switch turns the subwoofer on or off. When switched to On, the position of the power mode switch determines whether the subwoofer's power is on continually or turns on automatically when a signal is detected on the audio input. When no signal is detected, the sub's amp will automatically turn off after a few minutes.


Inputs: The ESW-M6 features a pair of gold-plated RCA line in/sub in jacks. If you are connecting the subwoofer to a receiver or processor with a LFE or Subwoofer preamp output, you should connect a single RCA cable to the LFE/left input.

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Energy ESW-M6 Reviews

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4 out of 5

Tiny footprint...BIG sound

Written By Josh S, Knoxville TN on Thursday, March 31, 2011
Crutchfield Customer Review (What's this?)
Pros: super small footprint & shocking power for it's size.
Cons: price a bit steep if not on sale, wish some controls were more accessible

I recently purchased the Energy ESW-M6 as an addition to some Polk TSi-100
bookshelf speakers. I wanted a simple, but effective system for a turntable/CD
player and have the Onkyo TX-8555 receiver pushing everything.

I'll have to admit, I had great trepidation about this subwoofer's ability due
to it's size, but this thing is performing as advertised!! It adds all the bass
and depth that the Polk's don't have and the woofer itself is tiny!! My home is
small, so space is a very important issue. I tried turning off the woofer to
see the difference and the Polk's just sounded tinny without the Energy pumping
the bass, so I felt justified in my "blind" purchase.

Seriously, I was shocked by the sound coming out of this little guy. Now, if
you're looking for earth-shattering lows, you're obviously going to be going
with a larger model. If space is an issue and you just need solid, deep-enough
bass to complement some bookshelf speakers go for it! Controls such as on/off
and adjustments are on the back, so nearly impossible to get to depending on
where you put it, but that's true of most woofers.

Crutchfield had one of their great sales on this when I purchased, so I was
fortunate, but even at regular price, the size to power ratio of this woofer is
worth it!!
16 out of 19 people found this helpful
Was this review helpful?    Yes | No

Add accessories for the Energy ESW-M6

Use a high-quality subwoofer cable for bass that draws you into your movies and music. A cable is not included with this sub. See all categories & accessories

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Monster Core Power® 1200 USB Surge protector with built-in USB charging
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AudioQuest X2 Speaker Cable 14-gauge cable, connectors optional (50 feet, White)
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AudioQuest G2 Speaker Cable 16-gauge cable, connectors optional (50 feet, Gray)
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For a more in-depth review and enhanced detailed information on the Energy ESW-M6, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_732ESWM6/Energy-ESW-M6.html ).