F12G Direct Servo subwoofer

Name: F12G Direct Servo subwoofer
SKU: RYTHMIK_F12G
Price: 151500.00 INR
Availability: InStock

₹151,500.00

For audiophiles looking for uncompromising accuracy, our F12G subwoofer is the ultimate choice. It features our Direct Servo technology to ensure accuracy and definition. As an audiophile you appreciate that bass is the foundation of a satisfying music or home theatre experience. You also appreciate that there is more to a home theatre subwoofer than shaking the room, and that music can be far more satisfying with a subwoofer that can play deep.

Description

Product features include:

Patented Direct Servo technology
GR Research 12″ paper 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
Balanced XLR connections for professional use (XLR version option)
Parametric EQ

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.

GR Research 12″ paper high excursion driver

Driver features include:

Light weight paper cone with foam surround for superior dynamics
Low moving mass to ensure an exceptional transient response
High flux density in the gap to ensure low distortion
Extended upper bandwidth response allowing a higher crossover point than most

While designed primarily for their sound quality, these custom designed GR Research drivers also have an attractive classic subwoofer look with a large dust cap and treated paper cone. In conventional subwoofers, a heavier cone is required to achieve extension, but Direct Servo allows the use of a much lighter cone. The low moving mass and foam surround yield a very dynamic and accurate reproduction. Another feature of a paper driver is the extended upper bandwidth with a smooth and extended response. The smooth midrange response of this driver is better than many midrange drivers!

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. 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.

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.

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 ouptut for all of our sealed subwoofers.

Crossover options

A370PEQ3/XLR2/XLR3: For customers with an AVR or pre-processor, we recommend LFE inputs which bypass the crossover control. In this case, the crossover should be controlled via AVR. If you are still using stereo receiver or conventional pre/power amp setup with no bass management, then we recommend LINE input and set the crossover/phase controls to where the front speakers start to roll-off. Please refer to quickguide of the model for recommendation. To understand more about how to correctly integrate your subwoofer, read our phase alignment article.

A370PEQ: A370PEQ has extra 80hz 2nd order high pass filtered RCA outputs. For customers with an AVR, we recommend LINE inputs with AVR/12 LP filter switch setting, the crossover should be then controlled via AVR. If you are still using stereo receiver or conventional pre/power amp setup with no bass management, then we recommend LINE inputs, HPF outputs, and set the crossover/phase controls to crossover at 80hz. Please refer to quickguide of the model for recommendation. To understand more about how to correctly integrate your subwoofer, read our phase alignment article.

Integration

With many subwoofers, it is difficult to get a correct and seamless integration with the main speakers because the amplifier settings are often very different to the measured response. You may set the crossover point to 80 Hz, but the actual crossover point may be anywhere between 60 and 100 Hz!

With our subwoofers the upper and lower -3 dB points are a very close match to the settings selected. If you set bass extension to 14 Hz, that is exactly what you will get. All this is possible because Direct Servo ensures a stable and flat response.

Another aspect of getting a correct integration is phase alignment. We have written a guide on how to achieve a phase aligned subwoofer.

Output, extension and user preferences

We use high quality high excursion drivers which make it possible to achieve high output in a relatively compact enclosure. Only with Direct Servo is it possible to achieve such deep bass extension, high output and very high damping simultaneously. The effective system Q is 0.3. A lower Q factor represents a higher level of damping, indicating control of the cone. A typical subwoofer has a Q of 0.707 and some achieve a Q as low as 0.5. The penalty is that the box is larger and the output is lower in order to achieve lower Q, but Direct Servo can achieve much lower Q without sacrificing output and making the box bigger.

When more output than one subwoofers can provide is desired, it may be tempting to look for a higher output option. Our subwoofers represent what we consider to be the output limit for an affordable and accurate subwoofer. It’s possible to get higher output with one subwoofer, but not without significant compromise and additional cost. We suggest multiple subwoofers as a much better option. A side benefit is that this can also improve the integration with the acoustics of each particular room.

The bass extension controls allow the user to customize the deep bass extension and the rumble filter to control cone excursion. For high SPL, one can set a higher cut off. For music one may prefer a lower cut off. Changing the settings can also result in a better integration with the acoustic gain of the room.

Additional information

Weight	34.02 kg
Driver	12" high excursion with custom sensing coil
Driver materials	Treated paper with foam surround Cast aluminum basket Copper flux de-modulation shorting rings
Amplifier	370w RMS class A/B patented servo controlled
Dimensions	15-3/4"(W) x 15-3/4" (H )x 17"(D) – (18-1/2" D with grille)
Frequency Response	14 – 100 Hz (-2 dB @ 14 Hz)
Crossover slope	Selectable 12 or 24 dB / octave (PEQ and XLR versions)
Crossover range (Low pass)	25 – 120 Hz
Rumble Filter (High pass )	20Hz 18 dB / octave
Phase	Response – 90 degrees phase shift at 20 Hz Adjustment – 0 – 180 degrees continuously variable
Bass damping factor	high (Q=0.5), med (Q=0.7), and low (Q=1.1)
Finishes	Available in black matte vinyl or black oak vinyl

F12G Direct Servo subwoofer

Description

Additional information

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