User manual ELECTRO-VOICE 634ASR DATASHEET

[. . . ] It should be noted that the frequency response graph (fig. 1 ) was measured in an anechoic (whole space) environment. From a practical standpoint, this is a sort of "worst case" measurement of low-frequency capability. In actual use, sitting on the floor, the long bass wavelengths will be reinforced by the floor and the room boundaries and will result in more low bass output than the graph implies, depending on the room and the Force Sub's position in it. [. . . ] Safety concerns limit the use of a pole greater than 30 inches in length, but under no circumstances should the total height of all components exceed 80 inches. Force Sub will handle a long term average power input of 300 watts RMS and realworld peaks of over 600 watts. The input connections are ¼ inch phone, but may also be ordered with Neutrik NL4MP connectors (Force Sub-E), which are recommended for sustained high power operation. Power handling. To our knowledge, Electro-Voice was the first U. S. manufacturer to develop and publish a power test closely related to real-life conditions. First, we use a random-noise input signal because it contains many frequencies simultaneously, just like real voice or instrument program. Second, our signal contains more energy at extremely high and low frequencies than typical actual program, adding an extra measure of reliability. Third, the test signal includes not only the overall "long term average" or "continuous" level--which our ears interpret as loudness--but also short-duration peaks which are many times higher than the average, just like actual program. The long-term average level stresses the speaker thermally (heat). WARNING: Under NO Circumstances should ANY amplifier be used in Bridge Mode. Bridging an amplifier results in abnormally high peak voltage levels that can destroy your speakers. Limited Warranty Electro-Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specified period, as noted in the individual product-line statement(s) below, or in the individual product data sheet or owner's manual, beginning with the date of original purchase. If such malfunction occurs during the specified period, the product will be repaired or replaced (at our option) without charge. The product will be returned to the customer prepaid. Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain specific items described in the individual product-line statement(s) below, or in the individual product data sheet or owner's manual; (c) malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner's manual; (d) malfunction resulting from misuse or abuse of the product; or (e) malfunction occurring at any time after repairs have been made to the product by anyone other than ElectroVoice Service or any of its authorized service representatives. Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to Electro-Voice Service or any of its authorized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice. A list of authorized service representatives is available from Electro-Voice Service at 600 Cecil Street, Buchanan, MI 49107 (800/234-6831 or FAX 616/695-4743). Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the customer. [. . . ] Electro-Voice shall not be liable for any incidental or consequential damages including, without limitation, injury to persons or property or loss of use. Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you. Other Rights: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. [. . . ]