User manual PEAVEY COMBO

[. . . ] (38. 6 kg) Features: · Two-way, full range/biampable PA enclosure · Sound Guard HF driver protection circuit · Rx22TM driver with a 2" titanium diaphragm coupled to a CH® 941 90° X 40° constant-directivity horn · 15" BWX Black Widow® with Kevlar® cone and field-replaceable basket · SPTM X series trapezoidal cabinet and styling with integral stand adapter · External voicing switch · Neutrik® biamp jack frequency driver from unforeseen accidents. A voicing switch on the input cup allows for the selection of two different response settings for the loudspeaker system. The normal position will yield a more flat response. [. . . ] This position may be preferred for some types of program material. The response curve for each position is given in figure 1. Sound Guard III is the redesign of Peavey's proprietary circuit for high frequency driver protection for the new Rx22 compression driver. This is an integral part of the crossover for the COMBO. The input signal is routed through the Sound Guard III circuit in both full-range and biamp modes of operation. When the high frequency drive level to the COMBO exceeds a predetermined threshold the Sound Guard III circuit is engaged. The effect that this has is to subtly decrease the signal level going to the Rx22 so that it will not be damaged due to long-term overpowering. Short duration transients will not be attenuated by Sound Guard III and have the possibility to damage the Rx22. The Sound Guard III circuit is a dynamic circuit that will attenuate the signal more the larger the signal is, very similar to a compressor. A powder coated expanded metal grille covers the lower part of the front of the enclosure to protect the low Figure 1 Impedance 100 50 30 20 Z ( ) 10 5 3 2 1 20 50 100 200 500 1k Frequency (Hz) 2k 5k 10k 20k Figure 2 upon having a minimum of 3 dB of amplifier headroom available. Architectural and Engineering Specifications The loudspeaker system shall have an operating bandwidth of 53 Hz -- 16 kHz. The nominal output level shall be 98. 0 dB when measured at a distance of one meter with an input of one Watt. The nominal impedance shall be 8. 0 Ohms. The maximum continuous power handling shall be 500 Watts, maximum program power of 1, 000 Watts and a peak power input of at least 2, 000 Watts, with a minimum amplifier headroom of 3 dB. The nominal radiation geometry shall be 90 degrees in the horizontal plane and 40 degrees in the vertical plane. The outside dimensions shall be 33. 25 inches high by 21. 00 inches wide by 22. 75 inches deep. The loudspeaker system shall be a Peavey model COMBO. This product is manufactured under U. S. Patent 6, 064, 745. Harmonic Distortion Second and third harmonic distortions vs. frequency are plotted in figures 3 and 4 for two power levels. [. . . ] frequency are plotted in figures 3 and 4 for two power levels. Ten percent (10%) of rated input power and either one percent (1%) of rated input power or one Watt, whichever is greater. Distortion is read from the graph as the difference between the fundamental signal (frequency response) and the desired harmonic. [. . . ]