Performance & Specifications

A quick glance at our frequency response plot will reveal that our LV12R 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 - LV12R Frequency response chart with LFE input and extension switch set to low

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

Fig 1.1 - LV12R Frequency response chart with Line input and extension switch set to low

Integration

This subwoofer is designed to use with the bass management in an AV receiver. 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! The crossover control knob on our plate amplifier can serve as a fine tuning tool to reduce the overlap in output between the main speakers and the subwoofer. The sub has 3 extension settings for 3 different frequency response contours. Low extension setting also employs low damping to give a more full-body bass sound. High extension setting, on the other hand, employs high damping to give a more articulate bass sound.

Fig 1.1 - LV12R 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.