User manual DOD EQ

[. . . ] Discard the mains plug at a suitable disposal facility. NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13 AMP POWER SOCKET. Do not use the mains plug without the fuse cover in place. Replacement fuse covers can be obtained from your local retailer. [. . . ] The 2/3rds octave EQ allows you to quickly and easily modify a sound for use in music, recording, or sound reinforcement. DOD graphic equalizers offer both 1/3rd and 2/3rds octave models in stereo and 1/3 octave models in mono to meet any need. INSTALLATION Install the equalizer in a rack with the provided rack screws. Route the AC power cord to a convenient power outlet away from audio lines. The unit may be turned on and off using the front panel power switch. Since the units draw a relatively small amount of current during idle, they can be left on continuously. DOD equalizers generate very little heat during operation and thus do not need to be specially ventilated or cooled. The units should not, however, be subjected to high temperatures for extended periods. Although the unit's chassis is shielded against radio frequency and electromagnetic interference, extremely high RF and EMI fields should be avoided. Only the 1/4" phone plug and the optional XLR connector inputs and outputs can be used for balanced or unbalanced connections. The RCA phono plugs are for unbalanced connections only. Use only one input/output connector pair at a time. Using more than one input/output connector pair at a time can unbalance balanced lines, cause phase cancellation, short a conductor to ground, or cause damage to other equipment connected to the equalizer. EQ Series FOR BALANCED 1/4 " TSR PHONE PLUG CONNECTION - Wire the connectors as follows: Phone Plug tip ring sleeve Connection : high : low : ground 5 FOR 1/4" MONO PHONE PLUG OR RCA PHONO PLUG CONNECTION: Phone plug tip sleeve Connection : high : ground OPTIONAL XLR CONNECTORS - Optional XLR type connectors may be ordered installed in the units at the factory. These connectors allow both balanced and unbalanced connection to the equalizers, and are wired as follows: XLR Connector pin 1: pin 2: pin 3: Balanced Connection ground high low Unbalanced Connection ground high or hot ground Once the graphic equalizer has been installed and adjusted for the required equalization and level, an optional security panel can be installed to keep unauthorized persons from changing settings. 6 EQ Series APPLICATIONS DOD graphic equalizers can be used wherever modification of the frequency contour of a sound or sound system is needed. A graphic equalizer offers a solution to many common sound problems, both large and small. Also, creative experimentation on the part of the user can produce some nice results. SOUND REINFORCEMENT APPLICATIONS By routing the signal from the mixer to the main power amplifiers (or crossover), the overall frequency of the mix can be altered to do a number of things. Using a real time audio spectrum analyzer (such as DOD's RTA Series II), a calibrated microphone, and a pink noise generator, the audio system can be tuned to make the overall audio spectrum response of the sound system and the room environment flatter in frequency response. Greater gain-before-feedback characteristics can be achieved by turning up the sound system to the feedback point and attenuating the oscillating (ringing) frequency. 1/3rd octave resolution is best for this application. Turn the system up to feedback again and attenuate the second oscillating frequency. Repeat the process again for the third oscillating frequency. Protection of amplifiers and speakers can be accomplished using the LOW CUT feature of the equalizer. Wind noise or dropped microphones can cause damage to the amps and/or speakers. [. . . ] DOD warrants this product, when used solely within the U. S. , to be free from defects in material and workmanship under normal use and service. DOD Electronics liability under this warranty is limited to repairing or replacing defective materials that show evidence of defect, provided the product is returned through the original dealer, where all parts and labor will be covered up to a period of one year. The company shall not be responsible for any consequential damage as a result of the products use in any circuit or assembly. Proof of date of purchase is considered tobe the burden of the consumer. [. . . ]