User manual QSC AUDIO ISIS MULTIPURPOSE 120M

[. . . ] Any such condition severely reduces the safety of the installation and should be immediately corrected. Use only hardware which is rated for the loading conditions of the installation and any possible short-term unexpected overloading. Never exceed the rating of the hardware or equipment. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation. EN Warranty (USA only; other countries, see your dealer or distributor) Disclaimer QSC Audio Products, Inc. [. . . ] The aluminum spacer ring must remain in place. 4- Rotate the waveguide 90° clockwise or counterclockwise and set it back in place. Make certain the wiring is not stressed or pulled loose from its connections when rotating the assembly. 5- Before reinstalling the waveguide mounting screws, lift the assembly a small distance and make sure that the gasket and spacer ring are properly in place. Set the waveguide in place and install the screws. We recommend the use of removable thread sealant to prevent the screws from loosening. We recommend the use of removable threadlocker to prevent the screws from loosening. Do not overtighten. 4 Select the Desired Crossover Mode All models are equipped with a Crossover Mode switch. Before using, set the Crossover Mode switch to the desired position using a flat-tip screwdriver. The switch has a slotted shaft; insert the screwdriver tip into the slot and turn the shaft so the slot points to the desired mode. Do not change switch positions with power applied. FULL RANGE: This setting uses the internal crossover network. Connect the full-range input signal to Speakon pins 1+ and 1-. BI-AMP: This setting bypasses the internal crossover network and connects Speakon pins 1+ and 1- to the low-frequency (LF) driver and pins 2+ and 2- to the high-frequency (HF) driver. Signal processing ahead of the amplifier is required; the HF driver can easily be damaged if full range program is applied!Use a four-wire cable and an amplifier configured to operate in bi-amp mode. BIAMP OPERATION- Signal processing ahead of the amplifier is required; the HF driver can easily be damaged if full range program is applied! FULL RANGE EN BI-AMP Make the Required Connections All models are equipped with two Neutrik NL4-series airtight Speakon connectors. The two connectors are wired in parallel, allowing for multiple cabinets to be connected in parallel by plugging one cabinet into another with a suitable cable. Connector pinout is determined by the Crossover Mode switch setting. Full Range selection uses Speakon pins 1+ and 1-. Bi-amp selection uses pins 1+ and 1- for the LF driver, 2+ and 2- for the HF driver. There are pinout charts printed on the connector plate. [. . . ] Frequency with Recommended Signal Processing1 On Axis SPL (dB) 30° Off Axis Frequency (Hertz) ISIS 122M Bi-Amp Setting, Beamwidth vs. Frequency with Recommended Signal Processing1 Vertical Beamwidth (degrees) Horizontal Frequency (Hertz) (1) QSC DSP configurations with the recommended signal processing are available at http:\\www. qscaudio. com 23 ISIS 152M Performance Curves (ISIS W-152M similar) ISIS 152M Full Range (passive) Setting, Response and Impedance vs. Frequency On Axis 30° Off Axis EN Impedance Frequency (Hertz) ISIS 152M Full Range (passive) Setting, Horizontal and Vertical Beamwidth vs. Frequency Horizontal Beamwidth (degrees) Vertical Frequency (Hertz) 24 Impedance (ohms) SPL (dB) ISIS 152M Performance Curves (ISIS W-152M similar) ISIS 152M Bi-Amp Setting, Individual Driver Response and Impedance vs. [. . . ]