User manual DOD SREQ

[. . . ] All other servicing should be referred to qualified service personnel. For units equipped with externally accessible fuse receptacle: Replace fuse with same type and rating only. U. K. Mains Plug Warning A molded mains plug that has been cut off from the cord is unsafe. Never under any circumstances should you insert a damaged or cut mains plug into a 13 amp power socket. [. . . ] Dual channel units may be used as a stereo equalizer or as two independent equalizers. The units offer either 1/3rd octave or 2/3rds octave resolution, depending on the unit chosen. All DOD equalizers are solidly built with steel chassis and CSA standard circuit boards for years of reliable service. Most graphic equalizers divide up the audio frequency range into 1/3rd octave or 2/3rds octave pieces. The audio frequency range covers 10 octaves from 20 Hz to 20 kilo (thousand) Hz. If each of the ten octaves is divided into thirds, you get 30 pieces, or bands, of frequency. (The 31 bands on DOD equalizers result from including both 20 Hz and 20 kHz bands on the ends of the audio frequency range). A 1/3 octave equalizer means that 3 bands span 1 octave, while a 2/3 octave equalizer means that 3 bands span 2 octaves. Therefore, one band on a 2/3 octave equalizer is twice as wide as one band on a 1/3 octave equalizer. So, boosting or cutting any band will affect a wider range of frequencies on the 2/3 octave equalizer. A 1/3rd octave equalizer is the most precise because you're working with a narrower frequency range per band or slider on the equalizer. To cover the entire audio range, you need 31 bands or sliders, which normally take up the entire width of a rack panel, and take some time to adjust properly. A high-resolution real time audio spectrum analyzer (such as DOD's SR Series RTA ) is a very useful tool when setting up a 1/3rd octave graphic equalizer to compensate for poor room acoustics, poor speaker response, or the deficiencies of an audio system. While the 2/3rds octave is not as precise as a 1/3rd, it takes far less time to equalize a signal with this unit, and allows more channels of EQ to be reached. The 2/3rds octave EQ allows you to quickly and easily modify a sound for use in music, recording, or sound reinforcement. 3 4 SR Series EQ's 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. 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 inputs and outputs can be used for unbalanced connections. 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. [. . . ] 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 three (3) years. 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 to be the burden of the consumer. DOD reserves the right to make changes in design or make improvements upon this product without incurring any obligation to install the same on PRODUCTS PREVIOUSLY MANUFACTURED. [. . . ]