User manual VELODYNE DF-661

[. . . ] Servo control unit must have basic functions set to your installation type before applying power. Final calibration should be set by installer after initial power up. Installation manual MUST be followed precisely during installation process to ensure proper performance and prevent damage to speaker or control unit. 1 10 Congratulations! Thank you for purchasing a Velodyne product. Your purchase of a Velodyne servo-controlled subwoofer for the automobile shows a desire to achieve the highest possible quality of sound reproduction. This product has been engineered and built to the highest standards to provide you with years of listening pleasure. [. . . ] By designing the speaker and proprietary control circuitry from the ground up, we have reduced distortion to an order of magnitude below that of the best speakers currently available. Velodyne, the bottom line in bass. Warranty & Service Information This product is constructed of the highest grade materials and assembled under the strictest possible quality assurance conditions. Should a situation arise which leads you to believe the product is malfunctioning, please return to your authorized Velodyne dealer first. Should the product require repair or service, your Velodyne dealer is required to send the product in to Velodyne directly, we do not authorize outside service stations to make repairs to this product. If you have any additional questions concerning the specific warranty coverage, please consult the supplied warranty & registration card. Any additional questions which are not covered in this manual should be directed to either your authorized Velodyne dealer or contact us directly at Velodyne . . Care Of Your Velodyne This product combines both electronic devices and loudspeakers. Please take every precaution possible when installing and using the product so damage does not occur. q Do not allow objects to come in contact with the clear anodized aluminum cone, as the cone is very delicate. q Use only damp cloth when cleaning either controller housing or speaker. q If any part of your Velodyne Servo-Controlled subwoofer or controller should require service, return unit to your authorized dealer. If & when the output from the speaker starts to deviate from the music signal, the servo circuitry modifies the drive signal Practice Safe Sound WE WANT YOU LISTENING FOR A LIFETIME!Used wisely your new sound reproduction equipment will provide you with a lifetime of listening pleasure. Unfortunately, hearing damage from exposure to loud noise is often undetectable until it is too late. Since it is all too easy to keep "turning up the volume" so you can overcome road noise, we would like to issue this word of caution. Velodyne recommends that you avoid prolonged exposure to excessive sound pressure levels. The following list is included for your protection. Decibel Level Example 40 dB Quiet library, soft whispers 50 dB Typical quiet room 60 dB Office equipment, background noise 70 dB Vacuum, hair dryer, restaurant 80 dB Average city traffic Sustained exposure to levels of noise higher than this can be dangerous to your hearing. 90 dB Subway, motorcycle, lawn mower 100 dB Garbage truck, power tools 120 dB Live rock concert 140 dB Gunshot (close range), jet plane 180 dB Rocket launching pad Information courtesy of Deafness Research Foundation. 3 8 The Velodyne Story . . Founded in 1983 by David Hall, Velodyne Acoustics is the result of an effort to bring the discipline of mechanical engineering and the doctrine of common sense to the field of high performance audio- the Silicon Valley approach to sound. Through innovative thinking and inventive design, the company pioneered the first true servo-controlled subwoofers. The result was both the reference standard for bass reproduction and the foundation for distortion-free listening. Rejecting the trend toward high-end indulgence or fancy marketing gimmicks with no relevance to improving sound, Velodyne devoted its technical resources to bringing the benefits of ultra-low distortion technology within the reach of all dedicated music lovers. [. . . ] In fact, many state of the art recording studios & homes now feature Velodyne subwoofers as their "reference standard" by which all others should be judged. With the introduction of Velodyne's Distortion Free Series for the automobile, listeners finally have access to all the details and dynamics that make up the modern listening experience. By design, Velodyne speakers are incapable of error. to the amplifier. Forcing the speaker's acoustical output into a true representation of the music. [. . . ]