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* Discounts when sub is purchased with our speakers
$1,069.00
Budget Level High Performance
Looking for an affordable home theater sub that is also tight and musical? L22 uses our proprietary servo design to gain low frequency clarity and articulation.
Dual 12" drivers deliver low frequency impact and output that modern movies and music demand. While many of our competitors limit their best technology (such as servo) to their top level models, we wanted to make Direct Servo affordable, so we've held nothing back. As a result, you get the tight and musical bass you wouldn't normally expect from a subwoofer at this price range.
L22 SUBWOOFER DESCRIPTION
Looking for an affordable musical subwoofer that can be also used for home theater use? The L22 uses our proprietary servo design to gain low frequency clarity and articulation. For home theater use, L22 has a HT playback mode with rumble filter to limit less audible sub-sonic contents.
While many of our competitors limit their best technology (such as servo) to their top level models, we wanted to make Direct Servo affordable, so we've held nothing back. As a result, you get the tight and music bass you wouldn't normally expect from a subwoofer at this price range. L22 is one of the least expensive servo subwoofers on the market.
L22 SUBWOOFER FEATURES
Product features include:
- Patented Direct Servo technology with two independently servo control power modules
- Dual 12" light weight cone low inertia high excursion driver
- Solid and very inert enclosure available in a range of finishing options
- Bass extension controls allowing adjustment of bass extension and excursion control
- Selectable 12/24 db/octave crossover filter slope
- 120V-240V switchable power
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.
Learn more in our technology articles 
12" paper cone high excursion drivers
Driver features include:
- Low moving mass paper cone and rubber surround to ensure an exceptional transient response
- Large magnet for high flux density in the gap to ensure low distortion
- Flux de-modulation shorting rings to lower inductance and improve linearity
Our enclosures are very solid and well braced to minimize any cabinet resonance or coloration. The enclosure is heavily braced and the sub has a net weight of 53 lbs.
We also provide a range of finishes. Our range of attractive and excellent value vinyl finishes including:
- black matte veneer
- black oak veneer
L22 features a unique bass extension control, shown below.
 |
The bass extension control enables the user to customize the frequency response of the low end for the best trade-off between output and extension. If set to low music, bass has the lowest extension. The damping factor of this mode is 0.5 for the best time domain response. However, the disadvantage is slower attenuation of subsonic signals. For HT application, we recommend low-HT mode which incorporates a 3rd order highpass filter to filter out subsonic signals below 20hz. High extension setting is recommended for application where longer playback time and lower power consumption is required. |
To suit different setups, we provide a 12 db and 24 db/octave crossover (as shown in the above photo) with adjustable range from 30hz to 120hz.
120V-240 Switchable Voltage Selection
Correct voltage must be selected before use. Voltage switch is shown below.
L22 SUBWOOFER SPECIFICATIONS
The bass extension switch allows the user to customize the deep bass extension and the rumble filter to control cone excursion. For HT application, one can set the extension to Low-HT or High for higher SPL output. For music one may prefer a lower cut off such as Low-Music setting. Changing the settings can also result in a better integration with the acoustic gain of the room.
| Specifications | |
| Driver | Two 12" high excursion with custom sensing coil |
| Driver materials | paper cone with lightweight rubbersurround |
| Aluminum flux de-modulation shorting rings | |
| Amplifier | 600WRMS class D (dual Hypex Ucd modules) patented servo controlled |
| Dimensions | 14"(W) x 28" (H )x 16-1/2" (D) with grille and amplifier knobs |
| Shipping/gross Weight | 98 lbs/85 lbs |
| Frequency Response | 18 - 100 Hz (-3 dB @ 18Hz) LINE-IN, 18-200hz LFE IN |
| 12 - 120 Hz (+/-3db) LINE-IN, 12-250hz LFE IN | |
| Crossover slope | Selectable 12 or 24 dB / octave |
| Crossover range (Low pass) | 30 - 120 Hz |
| Rumble Filter (High pass ) | 20 Hz 18 dB / octave |
| Phase response | 110 degrees phase shift at 20 Hz with LOW MUSIC mode |
| Phase adjustment | 0 - 180 degrees continuously variable |
| Bass damping factor | Low music (Q=0.5), Low-HT(Q=0.9), and high (Q=0.8) |
| Standy power | 9W (standby, red light), 17W(ON,green light) |
| Finishes | Available in black matte vinyl or black oak vinyl |
| 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 |
L22 SUBWOOFER MEASUREMENTS
In the chart below, with bass extension controls set to Low Music, the response is 3 db down at 18Hz. The red and blue lines are the amplitude and phase response, respectively. The phase shift as only 120 degrees. But in reality the microphone itself has 18 degrees of phase shift at 20hz. Therefore L22 only has 102 degrees phase at 20hz.
L22 features bass extension switch allowing users to select among 3 different modes: Low Music (Q=0.5), Low HT (with a 18db/oct rumble filter at 20hz), and High (with 18db/oct bass extension at 28hz). Below is the frequency and phase response of Low HT mode. Note that the phase response (blue line) below 10hz is noisy because the response level is significantly down below 10hz.
The comparison of all 3 modes with LINE-IN is shown below
L22 accepts a pair of LINE-IN and one LFE IN. The LFE input mode extends the upper end response to 200hz.
Integration
L22 provides a 12/24 db/oct switchable low pass filter to so that it can easily integrate with any front speakers.
Another aspect of getting a correct integration is phase alignment between the front speakers and the sub. We have written a guide on how to achieve a phase aligned subwoofer. L22 has a phase/delay adjustment knob. More
L22 SUBWOOFER SUMMARY
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.
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