SbA750 User Manual Electro-Voice® SbA750 User Manual
Important Safety Instructions The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
Table of Contents 0 Introduction .............................................................................................................................................................. 1 Unpacking and Warranty ............................................................................................................................... 1 Setup and Connections .................................................................................................................................
0. Introduction Congratulations! In buying an Electro-Voice® SbA750 you decided on getting one of todays most advanced active subwoofers incorporating sophisticated technology. The active 15" subwoofer SbA750 with integrated 750 watt power amplifier has been specially designed to provide fundamental bass support for professional full-range and multi-channel cabinets. Through the integrated electronic frequency crossover of the SbA750 setting up an active stereo multi-channel system is truly simple.
1. Quick Start Caution: Before switching on the power of the SbA750 always set the LEVEL control to its counterclockwise stop. A playing sound source could otherwise lead to extreme output levels. This Quick Start Manual outlines the set up and operation of a SbA750 used as add-on subwoofer together with a Powermixer (see configuration examples). The operation procedures are equivalent for other mixers. 1. Set up your Powermixer system as usual and connect a signal source to the power mixer (e.g.
2. Controls Input L/Mono, Input R Electronically balanced inputs for the connection of highlevel signal sources such as mixers, signal processors, etc. Establishing the connection is possible via phone or XLR-type jacks. Balanced connection is recommended to prevent noise or HF-interference. Caution: Before connecting or disconnecting any plugs, make sure to set the level control to its counterclockwise stop, which prevents the system, the audience and yourself from being stressed by nasty contact noise.
Status Indicators These indicators provide information about the actual operational state of the SbA750s internal power amplifier. Signal Indicates that an audio signal is present at the input and that it is output. Limit When lit this indicator signals that the internal power amplifier actually operated at the threshold of clipping. Short-term blinking is not critical, because the amps audio limiter keeps distortion under control, so that the sound is unaffected.
3. Cabling LF-Cords Using balanced cables with phone or XLR-type plugs for connecting signal sources to the SbA750 is strongly recommended to prevent problems caused by noise interference. Make sure to mind the pin-assignment as shown below. 2, SIGNAL + XLR MALE XLR FEMALE 3, SIGNAL - 3, SIGNAL - 2, SIGNAL + SIGNAL SIGNAL + SIGNAL + The following illustration shows the most important cable connections and their pin-assignment. A balanced wiring is to be preferred in each case.
4. Setup Example A Add-On Operation The easiest way to expand your power mixer by means of a SbA750.
5. Setup Example B Stereo 2-way Active Operation with Mono Subwoofer In this operation mode only the Mid/High signals are fed to the fullrange speaker cabinets, which allows higher acoustic output levels.
6. Setup Example C Stereo 2-way Active Operation with Stereo Subwoofer The second SbA750 provides improved SPL in the bass range, in a full Stereo Setup.
7. Setup Example D Stereo 2-way Active PA-System Using two SbA750s to expand an existing fullrange-system, in a full Stereo Setup.
8. Setup Example E PA-system with Active Components SbA750 in combination with the SxA250, or other active cabinets.
9. Specifications Freq.
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U.S.A. and Canada: For customer orders, contact the Customer Service department at: 800/392-3497 Fax: 800/955-6831 For warranty repair or service information, contact the Service Repair Department at: 800/685-2606 For technical assistance, contact Technical Support at: 866/78-AUDIO Specifications subject to change without notice. All Other International Locations: 952-884-4051 Fax: 952-736-4212 www.electrovoice.com l Telex Communications, Inc. l www.telex.com Printed in U.S.A © Telex Communications, Inc.
