What is the difference between Q and bandwidth for a parametric EQ?
Q and bandwidth are two different ways to describe the range of frequencies affected by a parametric EQ filter. The two quantities are mathematically related and both state the same thing. Simply put, a “low Q” and a “high bandwidth” filter covers a wide range of frequencies, whereas a “high Q” or “low bandwidth” filter covers a narrow range of frequencies. • Why are the LPF and HPF frequencies different at the crossover point? Why is the LPF lower than the HPF? Won’t there be a hole in the frequency response of the loudspeaker? Why is the LPF higher than the HPF? Won’t there be too much energy at crossover? Often crossover filters are looked at as mathematical abstractions and implemented as tuned to a certain frequency as the “crossover point”. While this seems the obvious method for dividing up frequencies between LF, MF, and/or HF transducers, it ignores a significant fact: loudspeaker transducers are also filters. By nature, they each have “built-in” low and high pass filters. For
