User manual JBL HTPS-400

[. . . ] Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not use attachments not recommended by the product manufacturer, as they may cause hazards. This product should be operated only from the type of power source indicated on the marking label. [. . . ] 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-400 subwoofer is equipped with 2 sets of feet for use depending on the type of surface the subwoofer will be placed on. Enclosed with this manual is a set of rubber self-adhesive feet for use on hard surfaces, such as wood or tile floors, and a set of spiked feet for use on carpeted surfaces. To install the feet, set the subwoofer gently on a padded surface with the bottom side up. If you are using the rubber feet, attach them to the four corners of the unit, covering the holes. If you are using the spiked feet, install them by pressing them into the holes. The subwoofer may not perform as well as expected if you neglect to attach the feet. Grille Your HTPS-400 subwoofer has been packaged with the grille unattached for shipping purposes. In some applications, such as custom installations, the grille may not be necessary. In cases where a grille is needed, carefully align the grille pegs with the grommets and insert the grille. The grille is not designed for frequent removal, and cannot be readily removed with bare hands. If for some reason it becomes necessary to remove the grille, it should be pried off very carefully with a small, flattipped, jewelers' screwdriver, taking extra care not to damage the baffle or the grille. SPEAKER PLACEMENT Experiment with placement for the most accurate and uniform bass response throughout the room. It is important to avoid blocking the grille of the subwoofer. Since the HTPS-400 is videoshielded, it may be placed in proximity to a television monitor. A single HTPS-400 subwoofer meets THX Select requirements for a 3000-cubic-foot room. Top view However, to meet THX Ultra requirements for a 3000cubic-foot room, two or more HTPS-400 subwoofers are required. The preamp output featured on the HTPS-400 simplifies the hookup of multiple units (see page 4). Front view 0­2 ft. 3 HOOKUP Line-Level Inputs THX Mode: If your surround processor/ receiver is THX-certified: Note: When the THX/Normal switch is set to "THX, " the subwoofer's internal crossover and output level control are bypassed. THX®-Certified Receiver/Processor Subwoofer Out LINE GREEN­ON RED­STANDBY PHASE 180° EQ NORMAL GAIN CROSSOVER OUT IN 0° OFF AUTO ON THX MIN. 50Hz 150Hz To continue enjoying THXquality bass response in a very large room, two or more HTPS-400 subwoofers may be connected in series. of room volume, it is recommended that you add one HTPS-400. THX®-Certified Receiver/Processor Subwoofer Out Sub 1 GREEN­ON RED­STANDBY LINE PHASE 180° EQ NORMAL GAIN CROSSOVER OUT IN 0° OFF AUTO ON THX MIN. [. . . ] 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. Listen to your HTPS-400 subwoofer and main speakers with the switch in the "0°" position, then listen to the same material with the switch set to "180°" Decide which . sounds better and leave the switch in this position. Repeat this procedure if you change the location of the subwoofer. TROUBLESHOOTING If there is no output from the subwoofer: · Make sure the system is on and a source is playing. [. . . ]