User manual QSC AUDIO MODEL 1400

[. . . ] Series One v v v v Model 1100 Model 1200 Model 1400 Model 1700 Owner's Manual ® A U D I O *TD-000027-00* Rev. C 1 Series One Power Amplifier Operation Manual TABLE OF CONTENTS I: INTRODUCTION 1. 1 Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 2 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 3 Overview of Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Input Transformer Although the audio benefits of transformerless coupling are well recognized, certain users still prefer the security of a transformer-coupled input in severe environments. In addition to the QSC model T-1 input transformer, the Bauer Communication model RE-11P-QN is available for QSC amplifiers. Active Accessories In a number of special cases, the user needs built-in power limiting, bi-amp capability, etc. In order to serve these needs without adding to the basic cost of the amplifier, the octal socket has been designed with low-level DC power tapped off the internal supply of the amplifier. Ask the QSC Sales Department for details on availability. Octal Module Installation Peel away the protective cover and plug in the module, observing correct alignment of the guide post in the middle. The input bypass switches for that channel must be turned off (See Section 3. 5). Certain other switches may need to be set in accordance with the type of module and combination of channels desired. See the instruction sheet for each module for these details. Input to the module occurs automatically through the amplifier's input jacks. 3. 43 3. 44 3. 5 INPUT SWITCHES AND MONO BRIDGING 3. 51 Input Programming Switch An 8-pole input programming DIP switch will be found on the rear panel of the amplifier. The switch functions are as follows: (move levers up to turn on, down for off) Switches 1, 2: Bypass the Octal Socket for Channel 2. Keep "on" for normal operation (i. e. Turn "off" when an octal accessory is plugged in (see the instructions with the octal accessory). Switches 7, 8: Same as above for Channel 1. Switches 3, 4: Connects the output from an octal accessory plugged into Channel 1 to both amplifier channels. Turn "on" to feed the octal accessory to both channels. Turn "off" for normal operation or for using separate octal accessories. Switches 5, 6: Connects the inputs of Ch. If octal accessories are used, the inputs (not the outputs) of both accessories will be combined. This may be used in place of a Y-cord for feeding a common input signal to both channels. 3. 52 Mono Bridging Most stereo amplifiers have a method of combining both channels in series to give the combined power into a single load. This is a way to fully use both channels when only a single speaker is driven. [. . . ] QSC offers a plug-in Octal PowerLimit Module (PL-1) which can be adjusted to put a ceiling on the power level; the circuit acts to reduce volume as necessary to keep the power below the desired ceiling. The PL-1 lets you set the power ceiling independently for each channel, without the interruptions of fuse protection. Please contact the QSC Sales Department for specific information on the Octal Modules. 4. 6 USER RESPONSIBILITY Remember that your Series One amplifier has extra peak power (dynamic headroom) in reserve. Observe the hook-up and operating precautions. [. . . ]