Our Most Affordable Metal Cone Subwoofer
F12-400 uses 400WRMS amplifier HX410PEQ with
2 line-in RCA, one LFE RCA, and a one-band PEQ.
For customer with tighter budget, we have F12-300PEQ,
which uses 300WRMS amplifier HX310PEQ with 2 line-in RCA, one LFE
RCA, and a one-band PEQ. Both options use the same metal cone DS1204
driver.
Whiile F12-300PEQ uses an amplifier with similar
power output as that of L12, there are two important improvements:
metal cone and larger enclosure (which increases SPL output below
30hz).
We recommend F12-300/F12-400 for music and
light duty HT in small room. For higher duty HT application, one
should consider F12 or larger models. F12 has slightly higher headroom
than F12-400 for HT application.
F12-400/F12-300 are on back order till further
notice.
Documentation:
F12-300 Quickguide(retired
product)
F12-300PEQ Quickguide
F12-400PEQ
Quickguide
Integration
guide
|
Description:
F12-400 with PEQ, 2 line-in RCQ and 1 LFE |
Price |
|
|
F12-400PEQ-BO black oak with
HX410PEQ 400WRMS amp and 48 states shipping (back order till
further notice) |
$889 |
 |
|
F12-400PEQ-BM black matte
with HX410PEQ 400WRMS amp and 48 states shipping (back order
till further notice) |
$889 |
 |
|
Description:
F12-300PEQ with PEQ, 2 line-in RCQ and 1 LFE |
Price |
|
|
F12-300PEQ-BO black oak with
HX310PEQ 300WRMS amp and 48 states shipping (back order till
further notice) |
$829 |
 |
|
F12-300PEQ-BM black matte
with HX310PEQ 300WRMS amp and 48 states shipping (back order
till further notice) |
$829 |
 |
Performance & Specifications
The extension filter in F12-300/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.

Fig 1.0 - F12-300/F12-400 Frequency response
in Low-Music mode

Fig 1.1 - F12-300/F12-400 Frequency response
in Low-HT mode
The high extension setting further reduces
the extension and thermal stress for extended duration of playback

Fig 1.2 - F12-300/F12-400 Frequency response
in High exension mode
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
with custom sensing coil DS1204 |
Driver materials |
Black only anodized aluminum
with rubber surround |
|
Cast aluminum basket
|
|
Aluminum flux de-modulation
shorting rings |
Amplifier |
400WRMS class D Hypex
module-based patented servo controlled |
Input Impedance |
33kohm for RCA inputs;
10kohm for mini-XLR inputs |
Dimensions |
15-3/4"(W) x 15-3/4"
(H )x 17"(D) - (18-1/2" D with grille) |
Shipping Weight |
68 lbs |
Frequency Response |
14 - 100 Hz (-3 dB @
17Hz) with LINE input |
|
14 - 200 Hz (-3 dB @
17 Hz) with LFE IN |
Crossover slope |
Selectable 12 or 24
dB / octave |
Crossover range (Low
pass) |
50 - 100 Hz (100hz to
200hz range is not usable for this sub) |
Rumble Filter (High pass
) |
17 Hz 18 dB / octave
built-in for Low-HT mode |
Phase response |
90 degrees phase shift
at 20 Hz |
Phase adjustment |
0 - 180 degrees continuously
variable (6ms max delay adjustment) |
Bass damping factor settings
|
Q=0.5 for Low-music
mode |
Finishes |
Available in black matte
vinyl or black oak vinyl |
Warranty |
5 years warranty on driver
and 3 years on electronics |
|
45 day satisfaction guarantee |
|