User manual VELODYNE ULD-12

[. . . ] The exclamation point symbol is intended to alert the user to the preserce of important operating ard rnalntsnarce (servicing)instn. x::tions in the Irterature accompanying the subwoofer. Read Instructions - All safety and operating instructionsshould be read be fore the subwoofer is operated. Relain Inslructions - The safely and operating instructions should be retained for future reference. Heed Warnings - All warnings on ltle subwooler and in the operating instructions should be adhered to. Follow Instructions - All operating am use instructions should be followed. [. . . ] 11_ Pow er-Cord Proteclion- Power-supplycordsshouldbe routedsothat ltIey arenot likelyto be walkedon or pinched by items placed upon or against them, paying particularattention to cords at plugs, convenience receptades, and the point at whidl ltl ey exit from Ule subwoofer. "caution: To prevent electricalshock , match wide blade ot plug to wide slot, fully inserted. ' "Attention: pou r eviler les chocs electriques, inlroduire lame Iaplus largede la fichedans Iaborne corresooooante de la prtseet pousser iUsQ au ford. " u' 13. Cleaning - The subwoofer should be dea ned only as recommeroed by ltIe manufacturer. 14_ Nonuse Periods - The power cord of the subwoofer should be unplugged from the outlet wtlen left unused for a long period of time. Object and Liquid Entry - care should be taken so thai objects do rot fall ard liquids are not spilled onto the enclosure. , 16. Damage Requirtng Service - The subwoofer should be serviced by qualified service personnel when: a. The subwooler docsnot appear to operate normally or exhibits a marked change in performance. 17_ ServO ng - The user sboud not atterrot 1 service the sLtlwoofer beyond what is descriJedin the operating 0 instructions. 1. 2. 3. Product Features & Controls · 12" forward firing woofer with 2" voice coil & 55 oz. magnet · 15" downward firing passive radiator · Built-in 250 watt (RMS) power amplifier · Adjusta ble (40 to 120hz) low-pass cross over with bypas s option · Selectable (80 or 100hz) high-pas s crossover · Line-level inputs & outputs · Speaker-level inputs & outputs with 5 way binding post connec tions · Signal sensing auto turn on/off with bypass option · Variable volume control · Variable phase contro l (0 to 180 degrees) · Two position audio/video listening selection switch (+3dB, vide o) · Response, 22 hz to 120 hz, +/- 3dB · Detachable power cord (avai labl e on some versions) · Magnetically shielded for video use · Dual staggered low-pass crossover; 12dB/octave initial, 24dB/ octave ultimate All other servicing should be refened to qualifiedservice personnel. · Gain com pression circuit to protect woofer from over excursion · Input ov erload protection · Th erm al power sensing to protect woofer's voice coil from burnout · Power on LED (green) You should set the crossover frequency to obtain a smo oth a nd sea mless transition from the subwoofer to the main speakers in yo ur system. If your main speakers are small er units with limited low frequency output, you may wish to choose a higherf requency (such as 100-120hz) than you would with larger speakers which have greater low frequency output. Some surro und sound processors/receivers, including the Dolby AC3 sys tem with there . 1 channel outputs, have a "subwoofer out" jack that is already crossed over and designed to be used with a conve ntional amplifier and speaker. Combining both an external crossover and the one internal to the subwoofe r may result in low output and increased noise . In these cases, to optimize your subwoofer pe rformance you should bypass the intern al cross over in your Velodyne subwoofer. Line-level connection Figure 1 shows connection to a pre-amplifier's main outputs and returning them to your amplifier inputs. W ~ e n installed in this fashion, your satellite speakers will be crossed over at 80/1O Ohz which remove s the lower bass from your amplifier and speakers, enab ling them to do a better job reproduc ing high frequencies. By utilizing this method, you will have a bi amplified system, gaining improved power and headroom for your syste m. ~ To bypass the crossover within the subwoofer, simp ly locate the switch marked "normal/bypass" on the back panel of the subwoofer and set to the "bypass" position . Note If not using an external crossover, you should use the built-in crossover for optimal performance. Subwoofer out from AN Processor From the low pass output of your signal processor Install into right or left RCA line in connector in the back of the subwoofer or use a "Y!' connector adapter into both right and left RCA line in connectors in the back of the subwoofer. Figure 1: Installation using lin e-l evel (line in) inputs / "'Co. . . . -. . -0_ . . _ c. 'J1C:. tJ:l. J_::. _9~ _~O~~ O _ F'O l" ··· , . . ~ 1 H II . . . Velodyn e "" ) '@'@r@-@ , . . ~« ~. --@ . ;~ft ~=::~ ( _n_ ) ~. . . . :::-: :-. :-- Speaker-level connectio \ " Figure 2 shows an easy way to connect your ULD-12 subwoofer directly to your receiver or integrated amplifier. When connected in this fashion, your satellite speakers will be crossed over at 80/1OOhz, which removes the lower bass from your speakers thus, enabling them to do a better job reproduc ing high frequencies. You may also conn ect your satellites directly to your receiver or amplifier along with the subwoofer if you wish to bypass the internal high-pass crossove r. . . / AMPLIFIER MAIN IN PUTS RIGHT LEFT MAIN OUTPUTS RIGHT LEFT <f ~ TO "" ~!> ~!> ~ ~ ~~ a. TELLITE SPEAKERS Figu re 2: Installation using speaker-level (from amplifier) inputs / N~ ~"oo. [. . . ] Using, shipping , or oth erw ise storing the VA-1215X II subwoofer in any other position for an extended period of tim e may result in damage to the unit not covered by warranty. The VA-121 5XII Subwoofer is magnetica lly shie lded to reduce magnetic emission from its cab inet to increase the number of possible locat ions ava ilab le for placement. Certain typ es of te levisions are particularly sensitive to stray magnetic fields. legs) Frequency Response High Pass Crossover Low Pass Crossover ULD-12 18" x 19-1/8" x 20" (W, H, O) 22hz - 120hz +/- 3 dB 80hz or 100hz (6 dB/octave) 40hz - 120hz (6 dB/octave, 24 dB ultimate) Troubleshooting & Service Amplifier Before seeking service for your ULD-12 subwoofer, please re check all systems. [. . . ]