User manual JBL HTPS-400

[. . . ] This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For products intended to operate from battery power, or other sources, refer to the operating instructions. [. . . ] 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. 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. 50Hz 150Hz Sub 2 GREEN­ON RED­STANDBY LINE PHASE 180° EQ NORMAL GAIN CROSSOVER OUT IN 0° OFF AUTO ON THX MIN. [. . . ] 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. 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 . [. . . ]