User manual SMART DEVICES EXM556 INSTALLATION

[. . . ] 5945 Peachtree Corners East Norcross, GA 30071-1337 Table of Contents SECTION 1 SECTION 2 SECTION 3 SECTION 4 SECTION 5 SECTION 6 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SMART products are designed to deliver unsurpassed quality in workmanship and performance. The following information gives detailed instructions on the installation and operation of the SMART EXM556 processor. We strongly encourage new owners of the EXM556 to thoroughly read this entire manual before placing their new SMART product into service. This will ensure that the EXM556 will be operated properly to give the superior performance that it was designed to deliver. [. . . ] device that performs other changeover functions. Make sure the switch or relay contacts can handle the required exciter lamp current. INSTALLATION INSTRUCTIONS AMPLIFIER OUTPUTS The stage speakers may use conventional broadband power amplifiers with a crossover network at the loudspeakers, or they may use a biamplified scheme where there is no crossover at the speaker, but a separate power amplifier feeds the high frequency driver and another feeds the bass speakers directly. An electronic crossover divides the audio spectrum into two parts to feed the inputs of the power amplifiers. If you are using conventional amplifiers, connect each amplifier output to the appropriate input terminals on the monitor labeled "FROM AMPLIFIER OUTPUTS. " BE CAREFUL!Most solid state power amplifiers tie the low output to amplifier ground. Connecting the HOT terminal to the monitor ground could "fry" the amplifier or monitor input. Connect conventional amplifiers only to the LF inputs on the back of the monitor. Even though these inputs are labeled LF for biamplified systems, they are actually broadband, full range inputs. When connecting a biamplifier to the monitor inputs, the HF (high frequency) amplifier outputs are connected to the appropriate channel HF inputs on the MN/EXM556 monitor. The LF (low frequency) amplifier outputs are connected to the LF inputs of the monitor. The signals from the HF and LF amplifiers are summed at a 1:3 ratio inside the monitor so that the proper balance of HF and LF sound is heard in the monitor speaker and through the headphone jack. When listening to the monitor you can determine if a section of the biamplified signal has failed. If the monitor sounds bassy, the HF amplifier is not producing the HF sounds. If the monitor sounds shrill, the bass amplifier may have failed. 3 EXM556 STEREO PROCESSOR CENTER AMP BACKUP Connect the output of the center channel amplifier to the terminal strip labeled "FROM CENTER AMP OUTPUTS. " This is important if you wish to take advantage of the center amp backup feature that is part of the MN/EXM556 monitor. Be sure to observe the correct polarity from the amplifier to the monitor terminals. A mistake can destroy the monitor or amplifier. Next, hook the stage speaker to the terminal strip labeled "TO CENTER SPEAKERS. " Notice that terminals are provided for HF and LF amplifiers and speakers for use in biamplified systems. If you are using conventional amplification, connect only to the LF terminals. When a biamplified system is used, the MN/EXM556 will send a signal to both the HF driver and LF woofer. The HF driver is protected in the backup mode of operation by a passive network in the MN/EXM556. The emergency audio backup system is a valuable feature for your theatre customer. QUICK CONNECT INPUT A DB25 computer type connector is provided on the rear of the chassis for quick connection of a SMART stereo processor. [. . . ] The speaker and amplifier in the MN/EXM556 have a shaped frequency response that will penetrate the projector, exhaust fan, and platter noises normally found in the booth to make listening more intelligible. The headphone output is smoother in response. Any stereo headphone with an impedance of 4 ohms to Hi-Z is usable. In the event of a failure of the center amplifier, a center amp backup is built into the MN/EXM556. [. . . ]