When adding a subwoofer to KTV audio equipment, how should we debug it so that not only the bass effect is good, but also the sound quality is clear and not disturbing the people?

There are three core technologies involved:

1. Coupling (resonance) of subwoofer and full-range speaker

2. KTV processor low frequency debugging (indoor reverberation)

3. Cut off excess noise (high-pass and low-cut)

Coupling of subwoofer and full-range speaker

Let’s talk about the coupling of the subwoofer and the full-range speaker first. This is the most difficult part of subwoofer debugging.

The frequency of the subwoofer is generally 45-180HZ, while the frequency of the full-range speaker is about 70HZ to 18KHZ.

This means that between 70HZ and 18KHZ, the subwoofer and full-range speakers both have sound.

We need to adjust the frequencies in this common area so that they resonate rather than interfere!

Although the frequencies of the two speakers overlap, they do not necessarily meet the conditions of resonance, so debugging is required.

After the two sounds resonate, the energy will be stronger, and the timbre of this bass region will be fuller.

After the subwoofer and the full-range speaker are coupled, a resonance phenomenon occurs. At this time, we find that the part where the frequency overlaps is bulging.

The energy of the overlapping part of the frequency has increased a lot than before!

More importantly, a complete connection is formed from low frequency to high frequency, and the sound quality will be better.