Carvin TRX3210A TRx3210A manual - Page 18

TRx3210 High Frequency Attenuation Switch Each Carvin TRx3210 Line Array loudspeaker contains a high-frequency section that is designed for extremely high sound pressure level (SPL). When the TRx3210 is used in large multi-box arrays, the mid and low frequency speakers mutually couple and produce higher SPL's. The more speakers used, the more output and coverage is accomplished. In smaller configurations of less than four units, it is recommended that the high frequency section of each box be lower in output volume (attenuation). Depending on the amount of boxes used, room acoustics, and application, different levels of attenuation will be needed to match the volume of the mid/low frequency drivers. Another use of the attenuation switch is to control shading in multiple-box arrays. In larger configurations, it may be specified to have the upper boxes produce full output of the HF frequencies to project longer distances to the rear of the venue, while the lower boxes are attenuated for the near-field listeners. The HF Attenuation switch has three user selectable positions 0dB, -3dB, and -6dB. Since every room is different, the level of attenuation should be selected accordingly. Note: This switch is only functional in FULL RANGE passive mode. This switch has no effect in BIAMP mode. Remove rubber plug marked H.F. ATTENUATION from the connection panel. Using a small flat-head screw driver, carefully insert screwdriver into opening and slide switch to the desired attenuation setting. Replace rubber plug after change. 18