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* Discounts when sub is purchased with our speakers

The Subwoofer For Audiophiles

The dual driver version of our renowned F12.  Ideal For audiophiles looking for uncompromising accuracy and higher output levels than our F12 subwoofer. Featuring our Direct Servo technology to ensure accuracy and definition.

What makes our subwoofers suitable for audiophiles? It's not that they can plumb the depths with authority, there are already many subs on the market which can do that. The difference is that they reproduce bass with a level of realism that is normally only associated with much more expensive high end full range loudspeakers.


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Direct Servo Technology

All our subwoofers use our patented Direct Servo technology, providing high end performance at an affordable price. It allows us to use lighter and more efficient drivers and still achieve deep bass without using excessive amounts of power. The servo reduces memory effects, counteracts thermal compression and various forms of driver non linearities.

H800XLR3 Amplifier and DS1204 Driver

E22 uses our dual Hypex-module HX800XLR3 servo amplifier and two DS1204 driver. DS1204 features anodized aluminum cone, a 2" voice coil with linear excursion range of +/- 15mm.

Integration guide


Features & Options

Product features include:

  • Patented Direct Servo technology
  • Two opposed 12" black anodized aluminum high excursion driver
  • Solid and very inert enclosure
  • Bass extension controls allowing adjustment of bass extension and excursion control
  • Selectable 12/24 db/octave crossover filter slope
  • Balanced XLR connections for professional use (XLR version option)
  • Parametric EQ
  • Choice of finishes - black oak or piano black

Direct Servo technology

All our subwoofers feature our Direct Servo technology, which is our secret to achieving tight and accurate bass. The benefits are far more than simply achieving low distortion (the amp below does not depict the actual control layout).

Direct Servo closed loop technology

Learn more in our technology articles >

Driver features include:

  • Rigid one piece dish shape black anodized aluminum cone ensuring control at high SPL
  • Low moving mass to ensure an exceptional transient response
  • High flux density in the gap to ensure low distortion
  • Flux de-modulation shorting rings to lower inductance and improve linearity
  • Extended upper bandwidth response allowing a higher crossover point than most

While designed primarily for their sound quality, these custom designed drivers are also stylish in appearance with a anodized aluminum cone and rubber surround. Unfortunately, it's not possible to judge the accuracy of a driver by observing its appearance. There are other drivers on the market which in fact look quite similar, and it's tempting to think that they are comparable. Many of them are inferior in performance due to a heavy moving mass, the absence of shorting rings, wider gaps around the voice coil and high inductance which limits the useable high frequency cut off point. Many aren't suitable for a crossover point higher than 50 Hz. This is very limiting when one considers the large number of home theatre speakers which perform better when relieved of bass duties.

Read more >

Quality enclosure

Our enclosures are very solid and well braced to minimize any cabinet resonances or coloration. The baffle into which the driver is mounted is double thickness.

Available finishes for E22:

  • piano black
  • black oak vinyl

Bass extension controls

All of our subwoofers feature unique bass extension controls which are not normally provided on subwoofers. This enables the user to customize the output and extension to achieve the best compromise in any room. Most subwoofers neglect to provide bass extension control, and the result is that dynamic headroom is compromised.

A370 controls The bass extension controls enable the user to customize the frequency response of the low end. The controls customize a high pass filter, which attenuates frequencies below a given frequency. If set to 14 Hz, bass below this point will be filtered. The damping control determines the slope of roll-off and the amount of time domain ringing. High damping provides the least amount of time domain ringing and the most gradual roll-off curve. Low damping provides the steepest roll-off at the low end at the expense of added time domain ringing. The combination of 28hz and low damping is recommended for maximum SPL output for all of our sealed subwoofers

Crossover options

To suit different setups, we provide a 12 db and 24 db/octave crossover. If you are using an AVR, then we recommend "AVR/12" (or EXT/12 in older amps). If you are still using stereo receiver or conventional prea/power amp setup, then we recommend the 80hz/24 db/octave setting. To understand more about how to correctly integrate your subwoofer, read our phase alignment article.

Balanced professional version

XLR3 balanced plate amplifier

For professional use, a balanced input version is available. The sub The outputs allow multiple subwoofers to be connected. Simply daisy chain the connections, running output from the first (master) subwoofer to the input of the next.

For home use, balanced connections are not normally required. However, for those using studio processors and EQ units with balanced outputs, this option may be more convenient. If connection to a source with RCA connectors as found on my home audio equipment, an adaptor may be used. In this case it should be noted that the connection can no longer be considered balanced.

For more information, including charts showing response with different settings, view our amplifier page >

PEQ parametric version

PEQ parametric version

The amp has one band of parametric EQ with adjustable frequency, gain and bandwidth. This means you can not only control the boost or cut, but also the width of the filter.

Additional bass management options are also provided. A switch allows the user to select a 12 or 24 db/octave crossover slope setup option. Where the higher slope (24db/octave) is selected, the amplifier uses a variable 12db/octave filter in addition to a fixed 12db/octave filter. One can choose with a switch the corner frequency of the fixed filter as either 50 or 80 Hz, which will suit most situations. The variable filter can be used for fine tuning.


The bass extension switches allow the user to customize the deep bass extension in both frequency and Q value. A rumble filter is available to control cone excursion. For HT application, one can set the extension to 20hz, low damping, and rumble filter ON. For music one may prefer a 14hz, high damping, and rumble filter OFF.

Driver Two 12" high excursion with custom sensing coil
Driver materials Aluminum cone with rubber surround
  Cast aluminum basket
  aluminum flux de-modulation shorting rings
Amplifier 800WRMS class D (dual Hypex Ucd modules) patented servo controlled
Input Impedance 33kohm for RCA inputs; 10kohm for XLR inputs
Dimensions 14-1/2"(W) x 28" (H )x 16-1/2" (D) with grille and amplifier knobs
Shipping/gross Weight 108 lbs/95 lbs
Frequency Response 14 - 200 Hz (-2 dB @ 14 Hz) with LFE inputs in A370PEQ3/XLR2/XLR3
  14 - 100 Hz (-2 dB @ 14 Hz) with LINE IN inputs in all models
Crossover slope Selectable 12 or 24 dB / octave
Crossover range (Low pass) 25 - 120 Hz
Rumble Filter (High pass ) 20 Hz 18 dB / octave
Phase response 90 degrees phase shift at 20 Hz with 14hz high damping rumble filter OFF
Phase adjustment 0 - 180 degrees continuously variable
Bass damping factor high (Q=0.5), med (Q=0.7), and low (Q=1.1)
Standy power 13W (standby, red light), 29W(ON,green light)
Finishes Available in black matte vinyl, black oak vinyl and piano black
Warranty 5 years warranty on driver and 3years on electronics
  45 day satisfaction guarantee
  Customers pay only one way return shipping in case of return


Coming Soon!



Many of our customers marvel that we are able to produce such exceptional subwoofers at such a low price. Our Direct Servo technology makes it possible, allowing us to get the most out of dual 12" drivers without the need for kilowatts of power. Don't be fooled into thinking that other more expensive subwoofers with much more powerful amplifiers will offer more output. The output of a subwoofer is determined by how much air the driver can displace, not the power rating of the amplifier. We could supply a more powerful amplifier, but there would be no increase in output, only extra cost.

These are some of the finest subwoofers ever manufactured and the difference in sound quality between these subwoofers and the typical big-box ported subwoofer is surprising. You will hear the difference the very first time you listen and as so many have said, you will never go back to a non-servo subwoofer.

Rythmik E22 Dual 12" Subwoofer

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