User manual JBL SP MKII

[. . . ] JBL SP MK II Surround Processor User's Manual Quick-Start ADVANCED OPERATIONS Press AMBIENCE UP to add more volume to Ambient Speakers. Press REF to return to pre-set levels Press SOUND STAGE to increase Stereo Separation. Press CENTER to return to pre-set levels Press SIBILANCE if dialogue is too loud from Ambient Speakers + Master Volume Ambience Ref. Sound Stage - Press CENTER ON to turn on Center Speaker. Press CENTER BOOST to increase volume from Center Speaker Press MUTE to cut off sound Press HI FREQ EQ if sound appears too bright Center Sib Fil Center On Mute Press DELAY UP to increase Ambient Spaciousness. [. . . ] Panorama settings cannot be stored because they are also program source dependent. SECONDARY FUNCTIONS: Which include: Center Channel On or Off, Sibilant and Re-Equalization (Re-Eq) Filters, Mute, Source, Record Select, and Center Boost, are displayed by LEDs behind the front panel window. The status of functions including Center Front On/Off, Noise Sequencer, Input Balance, are displayed by LEDs directly above the button which turns the function on or off. The Re-Eq and Center Channel On functions may be selected in all music modes. Center channel is Off when Hall 1 or Hall 2 surround modes are selected but it can be engaged, if desired. Re-Eq is only selected automatically in the THX Cinema mode but it may be disengaged in the THX Cinema mode or engaged in other modes. Because the need of Re-Eq in non-THX modes is program source dependent, it cannot be stored in other modes. 17 SET-UP AND CALIBRATION TESTING FOR PROPER SPEAKER POLARITY Proper polarity throughout the system is required before level calibration can be established. Wiring the loudspeakers in proper polarity is essential for precise localization of images and bass response--both important goals of the Home THX Audio system. Achieving proper polarity is made more complicated if amplifiers of different types are used in the system. Some amplifier designs invert the polarity of their output relative to the input signal. Speakers attached to these amplifiers must have their polarity inverted again to get it back where it belongs. The best way to ensure proper polarity in any home audio system is to compare each speaker to a single speaker which is used as the reference for the system. We will use the Left front speaker as the reference in our example. Check the wiring color code on both the amplifier and speaker jacks to verify correct polarity. L-R POLARITY: Check Left-Right polarity by listening to both speakers in the stereo bypass or center speaker off mode. If in doubt, reverse the leads on the Right speaker only and compare the results. Speakers with mismatched polarity will have a poorly-defined image smeared all over their end of the room. Some listeners will even feel strange pressure sensations in their ears!If you have any doubt, try using the pink noise on Chapter 6 of WOW!--this should make the difference extremely clear. L-C POLARITY: Check Left-Center polarity in the Home THX Cinema mode by feeding mono program material (dialog, or Chapter 6 of WOW!) and setting the input balance to the left so as to get equal sound pressure levels out of both the left and center speakers. Again, listen for a solid image between the left and center speakers. RELATIVE SUBWOOFER POLARITY: If multiple subwoofers are used, it is important to have their polarity with regard to each other correct. [. . . ] If the product was purchased in a country other than the USA, it is necessary to return the product to the distributor or selling location in the same country. Either way, you'll need to present the original bill of sale to establish the date of purchase. Please do not ship your JBL product to the factory without our prior authorization. In the United States, please call 1-800-336-4JBL for the location of the authorized warranty station nearest you. [. . . ]