User manual VELODYNE HGS-18 THX ULTRA 2 REV B

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VELODYNE HGS-18 THX ULTRA 2 REV B: Download the complete user guide (311 Ko)

Manual abstract: user guide VELODYNE HGS-18 THX ULTRA 2REV B

Detailed instructions for use are in the User's Guide.

[. . . ] "If you know subwoofers, you know about Velodyne. " -Corey Greenberg Home Theater Technology/February 1995 Face Off: Comparison of five subwoofers "In general, the Velodyne could play slightly louder, and often cleaner, than the Sunfire. " -D. B. Audio/ June 1998 HGS-15 THX Ultra 2 and HGS-18 THX Ultra 2 Owner's Manual "How do they get this kind of bass out of such a tiny box?Deep, tight, tuneful and loud enough to rattle pictures on the wall--this is serious subwoofing. " -Robert Deutsch Stereophile Guide to Home Theater/September 1998 ---------------------------------------------------------------- Velodyne Acoustics, Inc. 345 Digital Drive Morgan Hill, CA 95037 408. 465. 2800 voice 408. 779. 9227 fax Web: www. velodyne. com Service E-mail: service@velodyne. com Product E-mail: help@velodyne. com Technical E-mail: techhelp@velodyne. com High Gain Servo-Controlled Audio/Video Subwoofer System Printed on recycled paper. 10-02, #63-620 Rev. [. . . ] Packing this unit in any other carton may result in severe damage when shipping. Please take a moment to record the serial number and date/location of purchase in the space provided on the warranty card for future reference. Care of your subwoofer ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Do not use any harsh detergents or chemicals to clean the cabinet. Abrasives, detergents, or cleaning solutions may damage the finish on the cabinet. During normal conditions, your new subwoofer may be left on continuously without any problems. The unit is equipped with a signal-sensing turn on/off that will automatically turn on the unit when a signal is present at the inputs and turn off the unit after several minutes when there is no longer any signal at the inputs. If you plan to leave the subwoofer unused for an extended period of time, we recommend that you turn off the master power switch on the rear panel. continued. . 12 1 Product Features & Controls ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ · 15" (12. 7" piston diameter) or 18" (15. 2" piston diameter) subwoofer with tandem 3" voice coils and 220 oz. magnet · Built-in 1250 watt (RMS) high efficiency class D amplifier · Accelerometer based servo control system for extreme accuracy · Adjustable (40 to 120Hz) low-pass crossover (defeatable) · Selectable (80 or 100Hz) high-pass crossover outputs · Balanced (XLR) inputs · Line-level (RCA) inputs & outputs · Speaker-level inputs & outputs with 5 way binding post connections · Signal sensing auto turn on/off (defeatable) · Variable volume control · Selectable phase control (0° or 180°) · Selectable subsonic filter (15Hz or 35Hz) · Frequency response of 18-120Hz (HGS-15 THX Ultra 2), 15-120Hz (HGS-18 THX Ultra 2) · Detachable power cord · Magnetically shielded for video use · Multiple staggered low-pass crossovers; 12dB/octave initial, 48dB/octave ultimate · Gain compression circuit prevents over excursion & amp clipping · Infrared remote control with power, volume & mute functions · External remote connector for custom installation · Power on & protection indicator LED · Multi-layer resin laminate cone · High-excursion rubber surround The Velodyne servo-control solution ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Your Velodyne HGS subwoofer produces sound in the same manner as conventional loudspeakers: a cone-shaped piston is forced to move by means of a linear motor. We determined that conventional motors are unacceptable when called upon to produce the amount of linear motion we desired. This inadequacy led us to design an improved motor structure by incorporating two coils, operating out of phase in a push-pull configuration within two magnetic gaps & suspended by dual spiders for even greater linearity. We designed this motor to produce over one inch (1-1/8" to be exact) of linear motion, with a maximum mechanical limit of 2". Also, with this unique configuration, the distortion products are reduced by a factor of two over conventional single coil structures with dramatically improved cone control. This driver alone would result in less distortion than any other non servo design. We also designed this motor to be magnetically shielded from the start, to allow for convenient placement near the television monitors of home theater systems. The unique push-pull twin voice coil in these subwoofers is designed and built in-house on a custom built NC coil winding machine. Two layers are first wound inside the former and then two layers on the outside. This results in increased heat dissipation over normal designs which simply pile added layers on top of each other, burying several layers beneath the surface. We then utilized materials such as Polyimide resin impregnated fiberglass, for the former. This material is capable of withstanding the extremely high temperatures (320 degrees C) that can occur when driven by our powerful amplifiers. These speakers also feature our new Multi-Layer Resin Laminate cone system. This new cone starts with two-layers of reinforced pulp fiber, which are then heat pressed with a binding resin to form an extremely rigid cone structure. Attached to the edge of the cone is our newly designed rubber surround, tailored for long life under the high excursions these units are capable of. continued. [. . . ] If the remote control operating range deteriorates, please check batteries for deterioration. Do not leave remote placed on heat generating items, such as amplifiers. continued. . Interconnect cables ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ When installing your new Velodyne subwoofer using the line level connections, you should always use shielded phono cables. There are many decent cables available today, most any of which will work perfectly well. [. . . ]

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