Array Signal Processing pro.Bose.com
Page 18 Installation and Safety Guidelines
Digital signal processing (DSP) equipment is required for infrasonic protection, crossover, equalization, and protection limiting functions
for all RoomMatch array modules. The Bose PowerMatch™ PM8500 professional amplifier and Bose ControlSpace® ESP (both sold
separately) contain presets for all RoomMatch modules. When using other types of signal processing equipment, the following cross-
over filters are recommended:
Full-Range Module Applications (for use without subwoofers)
Driver Elements High-Pass Filter Low-Pass Filter
Type Slope Frequency Type Slope Frequency
Module LF Butterworth 24 dB/octave 50 Hz Butterworth 24 dB/octave 510 Hz
Module HF Butterworth 24 dB/octave 580 Hz none none none
Full-Range Module with Subwoofer Applications
Driver Elements High-Pass Filter Low-Pass Filter
Type Slope Frequency Type Slope Frequency
Subwoofer RMS215 Butterworth 12 dB/octave 40 Hz Butterworth 24 dB/octave 80 Hz
Module LF Butterworth 24 dB/octave 80 Hz Butterworth 24 dB/octave 510 Hz
Module HF Butterworth 24 dB/octave 580 Hz none none none
Array Compensation EQ
The RoomMatch module EQ presets in ControlSpace ESP and PowerMatch are based on the single module frequency response. For
multiple-module arrays, an additional EQ stage is required to compensate for the mutual acoustic coupling of the woofers. A special
DSP filter network has been developed for RoomMatch modules to provide consistent tonal balance independent of the number of full-
range modules in the array. This filter allows the user to set the number of full-range modules and the total vertical angle of the array and
generate the following electrical responses:
Figure 14. RoomMatch™ Array EQ Electrical Response Graphs
Hz
Hz
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