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English Installation and Operating Guide Page 33
pro.Bose.com Installation and Operating Guide
Setting the Limiting Function for use with 3rd Party Loudspeakers
The Limiting function allows you to restrict, per channel, the maximum signal level to the loudspeaker. Here are some simplified steps to
aid in setting the limiter function.
1. Locate the technical data specification sheet for the 3rd party loudspeaker.
2. Configure the amplifier outputs (MAIN MENU < CONFIG < OUTPUT CONFIG) to drive the loudspeaker at or beyond the rated
power of the loudspeaker indicated in the loudspeaker’s data specification sheet.
3. Select the proper EQ (flat or custom EQ for non-Bose loudspeakers) from MAIN MENU < DSP < SPEAKER PRESETS.
4. Using the manufacturer’s loudspeaker specification sheet, calculate the limiter RMS voltage using the loudspeaker's continuous
power rating using the following formula:
RMS Voltage = Square Root (rated power of the loudspeaker x loudspeaker impedance).
5. In the MAIN MENU < DSP < LIMITING menu, select the appropriate output channel and set the RMS voltage to the loudspeaker’s
RMS voltage.
6. Set the Peak value to 1.4 to 2 times the RMS voltage. Note the maximum RMS and Peak voltage values below in Figure 11 when
setting these parameters.
7. Reference loudspeaker data specifications or consult with loudspeaker manufacturer to obtain optimal settings for Attack and
Release parameters.
Figure 11. Output Channel Limiter Maximum Voltage Values
Mode Peak RMS V
Mono
71 V
50 V
I-Share
71 V 50 V
V-Bridge
142 V 100 V
Quad
142 V 100 V
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