Performance & Specifications

A quick glance at our frequency response plot will reveal that our LV12F 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.

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.

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

Integration

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.

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.