Mackie SRM 450 Service Manual - page 7
7
The Crossover
The built-in electronic crossover is a 24 dB/octave Linkwitz-Riley design.
Although more expensive than other crossover designs, the benefits provided by the
Linkwitz-Riley design have been well documented. These benefits include:
•
Absolutely flat frequency response throughout the bandpass, without the characteristic
ripple near the crossover point exhibited by other designs.
•
The sharp 24 dB per octave roll-off of the filters ensures that the transducers aren’t
reproducing frequencies outside of their capabilities.
•
The acoustic sum of the two driver responses is unity at the crossover frequency, resulting
in perfect power response.
•
Our heroic engineers have worked carefully to ensure that the SRM450 also provides
perfect phase response. This diligence has yielded phenomenal accuracy, even if you are
standing 20 feet away.
The Cabinet
The SRM450 cabinet was designed to be the strongest molded composite cabinet on the
planet. This material is as strong as concrete, and rigid enough to prevent unwanted
vibrations in the cabinet. It has built-in fly points for hanging, and a socket in the bottom
for mounting on a tripod stand. Although it is an exceptional choice for installed sound
situations, its light weight and durable finish also make it ideal for portable sound system
use. The asymmetrical trapezoidal design of the cabinet makes it easy to use as a floor
wedge for stage monitor applications.