Reference

There are many types of sound sources that do not require subwoofer reinforcement since they lack low frequency content. For instance, most signals captured by microphones such as voices and instruments in general, except those that do have low frequency content, like double ...

The illustrations below show the connection between balanced and un-balanced outputs on different connector types (XLR / Cannon, 14", phono/RCA/cinch) to balanced inputs on XLR and 1/4" connectors. ...

In the loudness contours reference, we learned that the frequency response of the human ear is not flat and it also varies ...

The following table shows the resulting damping factor, signal loss, attenuation and impedance for different cable lengths ...

Tables for conversion from Q to B/W (bandwidth) for DSP bell-type EQ. ...