User manual JBL HTPS-300

[. . . ] Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits, as contact with them might be fatal. Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or electric shock. [. . . ] When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. The product should be mounted to a wall or ceiling only as recommended by the manufacturer. 1. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles and the point where they exit from the apparatus. Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. Figure A. Example of Antenna Grounding as per National Electrical Code, ANSI/NFPA 70 Antenna Lead-In Wire Ground Clamp Antenna Discharge Unit (NEC Section 810-20) Grounding Conductors (NEC Section 810-21) Electric Service Equipment Ground Clamps Power Service Grounding Electrode System (NEC Art 250, Part H) 2 U N PA C K I N G Feet Your HTPS-300 subwoofer is equipped with 2 sets of feet for use depending on the type of surface the subwoofer will be placed on. This feature will automatically turn the subwoofer on when you turn Toggle Position Off On Auto your system on with the power switch in the "Auto" position and begin playing any program material. The subwoofer will return to standby mode when no signal is received for approximately 15 minutes. The power switch's "Off" position is for vacation use only. LED Color Red Green No signal present for more than 15 minutes ­ Red; signal present ­ Green Procedure Power switch off Power switch on and playing program material Simply turn off your receiver/processor. The subwoofer will turn on when your receiver/processor begins playing again. Output Level (Gain) ­ Normal (non-THX) Modes Only Output Level (Gain) Min. Output Level (Gain) Max. Note: When the THX/Normal switch is set to "THX, " the output (gain) control is bypassed. Output level is then adjusted at the THX processor. Min. Max. Crossover Frequency ­ Normal (non-THX) Modes Only The Crossover Frequency adjustment determines the highest frequency the HTPS-300 will reproduce. It allows a seamless transition from the subwoofer to the satellite speakers. Experiment with this adjustment to find the crossover frequency that sounds best with your speakers. Note: When the THX/Normal switch is set to "THX, " the internal crossover is bypassed. Crossover frequency is then adjusted at the THX processor. 6 Phase The Phase switch is used to adjust the relative polarity of the subwoofer to the other speakers. [. . . ] When the speakers are out of phase, the lowfrequency sound waves will cancel each other out, reducing bass response. The HTPS-300 provides a convenient phase switch that allows you to remedy this situation without relocating the speakers or changing any speaker connections. In normal THX operation, the Phase switch should be set to 0 degrees so that the subwoofer is operating in phase with the main speakers. In rare cases when the subwoofer is placed more than 25 feet away from the main speakers, or where the subwoofer is not being used with a THX-certified receiver, or processor, and speakers, the 180-degree position may provide a smoother frequency response. [. . . ]