Rythmik Audio F12-400

F12-400, which is a higher power version of F12-300, uses 400WRMS amplifier HX410PEQ with 2 line-in RCA, one LFE RCA, and a one-band PEQ. We recommend F12-400 as an alternative to regular F12 for customers with tight budget. Its lowest bass extension is essentially same as that of F12.

Performance & Specifications
The extension filter in F12-400 is simplied to 3 positions: Low-Music, Low-HT, and high with frequency and phase response shown below. Low-music has the lowest extension, -3 db @ 17 Hz. The response is flat and extended. For high SPL in movies, we recommend Low-HT mode with built-in rumble filter that preserves the FR to -3db@18hz while reducing potentially damaging subsonic energy.

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. More

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 sealed subwoofer has a Q of 0.9 and then equalized to Q of 0.7 by DSP or other equalization means. However, that does not alter the native Q value of those subs. Only our direct servo subs achives a native Q value of 0.3 with close-loop servo feedback control.

Driver: 12″ high excursion driver with custom sensing coil (DS1204)
Driver Materials: Black anodized aluminum cone with rubber surround, cast aluminum basket, aluminum flux de-modulation shorting rings

Amplifier: 400W RMS Class D (Hypex module-based), patented servo controlled

Input Impedance: 33 kΩ (RCA inputs), 10 kΩ (mini-XLR inputs)

Dimensions: 15.75″ (W) × 15.75″ (H) × 17″ (D) — 18.5″ depth with grille

Shipping Weight: 68 lbs

Frequency Response:
14 – 100 Hz (−3 dB @ 17 Hz) with Line input
14 – 200 Hz (−3 dB @ 17 Hz) with LFE input
Crossover Slope: Selectable 12 or 24 dB / octave
Crossover Range (Low Pass): 50 – 100 Hz (100–200 Hz range not usable for this subwoofer)
Rumble Filter (High Pass): 17 Hz, 18 dB / octave (built-in for Low-HT mode)
Phase Response: 90° phase shift at 20 Hz
Phase Adjustment: 0 – 180° continuously variable (up to 6 ms delay adjustment)
Bass Damping Setting: Q = 0.5 (Low-music mode)
Finishes: Black matte vinyl, black oak vinyl
Warranty: 5 years on driver, 3 years on electronics
Guarantee: 45-day satisfaction guarantee

Weight 31 kg

F12-400, which is a higher power version of F12-300, uses 400WRMS amplifier HX410PEQ with 2 line-in RCA, one LFE RCA, and a one-band PEQ. We recommend F12-400 as an alternative to regular F12 for customers with tight budget. Its lowest bass extension is essentially same as that of F12.

Performance & Specifications
The extension filter in F12-400 is simplied to 3 positions: Low-Music, Low-HT, and high with frequency and phase response shown below. Low-music has the lowest extension, -3 db @ 17 Hz. The response is flat and extended. For high SPL in movies, we recommend Low-HT mode with built-in rumble filter that preserves the FR to -3db@18hz while reducing potentially damaging subsonic energy.

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. More

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 sealed subwoofer has a Q of 0.9 and then equalized to Q of 0.7 by DSP or other equalization means. However, that does not alter the native Q value of those subs. Only our direct servo subs achives a native Q value of 0.3 with close-loop servo feedback control.

Driver: 12″ high excursion driver with custom sensing coil (DS1204)
Driver Materials: Black anodized aluminum cone with rubber surround, cast aluminum basket, aluminum flux de-modulation shorting rings

Amplifier: 400W RMS Class D (Hypex module-based), patented servo controlled

Input Impedance: 33 kΩ (RCA inputs), 10 kΩ (mini-XLR inputs)

Dimensions: 15.75″ (W) × 15.75″ (H) × 17″ (D) — 18.5″ depth with grille

Shipping Weight: 68 lbs

Frequency Response:
14 – 100 Hz (−3 dB @ 17 Hz) with Line input
14 – 200 Hz (−3 dB @ 17 Hz) with LFE input
Crossover Slope: Selectable 12 or 24 dB / octave
Crossover Range (Low Pass): 50 – 100 Hz (100–200 Hz range not usable for this subwoofer)
Rumble Filter (High Pass): 17 Hz, 18 dB / octave (built-in for Low-HT mode)
Phase Response: 90° phase shift at 20 Hz
Phase Adjustment: 0 – 180° continuously variable (up to 6 ms delay adjustment)
Bass Damping Setting: Q = 0.5 (Low-music mode)
Finishes: Black matte vinyl, black oak vinyl
Warranty: 5 years on driver, 3 years on electronics
Guarantee: 45-day satisfaction guarantee

Weight 31 kg