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  LV12M Direct Servo subwoofer
12" front vented HT sub

Performance & Specifications

A quick glance at our frequency response plot will reveal that our LV12M subwoofers has a flat frequency response down to 19hz with bass extension controls set to low. This subwoofer is designed to use with the bass management in an AV receiver with LFE input. When LFE input is used, the phase and cross-over knobs have no function.

sealed response

Fig 1.0 - LV12 Frequency response chart with LFE input and extension switch set to low-music

Alternatively, one can also use line inputs with both phase and crossover knobs in function. The frequency response is as follows.

sealed response

Fig 1.1 - LV12 Frequency response chart with Line input and extension switch set to low-music


LV12 with PEQ has 3 extension settings: Low-music, Low-HT, and high. Low-music has the flattest extension. For Low-HT, there is a 12db/oct rumble filter engaged to prevent the woofer from over-excursion. High extension roll-off at about 25hz and it is more energy efficient than the other two settings. All 3 are plotted below for a comparison (with line in mode). The differences are similar in LFE mode.

sealed response

Fig 1.1 - LV12 Frequency response chart with 3 different extension settings

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

Extension filter settings to match your room

Vented subwoofers do have more phase delay at the low end frequency spectrum. That combined with poor room acoustics sometimes produces boomy bass sound. We have variable extension frequency and damping settings to address that. Customers should experiment with extension filter settings. Low extension setting is recommended for HT use whereas high extension setting (24hz, Q=0.8) is recommend for music.

Driver 12" driver with custom sensing coil
Driver materials Paper cone with rubber surround
  Aluminum cast frame basket
  Copper flux de-modulation shorting rings
Amplifier 300WRMS Hypex class D module with patented servo controlled
Dimensions 15 (W) "x 19-1/2" (H) x17" (D) (18-1/2" D with grille and amplifier knobs)
Shipping Weight 69lbs
Frequency Response 19 - 300 Hz(+/-2db) with LFE ; 19-100(+/-2db) with Line-in
Crossover slope 12db/octave only
Crossover range (Low pass) 40 - 120 Hz (Line level frequency response top out at 100hz)
Rumble Filter (High pass ) built-in 12db/oct at 20hz to limit subsonic cone excursion
Phase adjustment 0 - 180 degrees continuously variable
Bass extension settings Low (19hz,Q=1.1), med (22hz,Q=0.9), and high(24hz, Q=0.8)
Finishes Available in black matte vinyl or black oak vinyl

5 years warranty on driver and 3 years on amplifier
(warranty does not cover abuse)

  45 day satisfaction guarantee