20CONFIGURING THE S170iTRIGGER SETUPThe S170i is equipped with 3 12-volt trigger outputs that may be used to turn on, activate, or otherwisecontrol ancillary components or systems, such as power amplifiers, projector-lifts, lighting systems, andmore. Their function could be as simple as powering up and down your NAD S250 power amplifier, or ascomplex as readying an entire home-theater room for use. For more technical information on the S170i’s12-volt trigger outputs, see Appendix 1, or consult your installing NAD audio specialist.Simple 12-Volt Trigger Configuration Example: Powering the NAD S250 Power AmplifierThe following example employs the S170i’s 12V Trigger #1 to turn the S250 amplifier on and off inconcert with the preamplifier.• Using the 12V Trigger cable supplied with the S170i connect the S170i’s rear panel 12V Triggers jackmarked #1 to the 12V Trigger input jack on the power amplifier. Note that this custom cable providesan 1/8th-inch mini-plug on one end for the S170i, and a special, DC-style plug on the other to fit theS250 amplifier’s trigger input.• From the OSD Main menu, select the item using the remote’s [Cursor ], and[Enter] keys. The listings should appear as follows (these are the defaults):polarity Posit.delay Noduration Infin.If any other settings are in place, use the remote’s [Cursor ] and [Cursor ] keys to change themto the above conditions.THX AUDIO SETUPTHX Surround EX creates a sixth, “center-back” channel intended for reproduction by one or moreloudspeakers located behind the listening area. With recordings bearing the Dolby Surround EX mark, thisdelivers a specifically engineered center-back channel that is encoded into the left/right surroundchannels-precisely as the center channel was encoded into the left/right front channels in matrix-encodedDolby Surround mixes. However, the THX Surround EX processing will often produce a useful center-backeffect even from software that was not, originally, deliberately encoded for EX playback.BASS LIMITERThe S170i incorporates a Bass Limiter that you can set to eliminate any chance of your subwooferproducing audible distortion. You will do this by auditioning a built-in test-noise signal the S170i sends toyour subwoofer, and increasing the Bass Limiter’s “headroom” setting to the point of audible distortion.The Bass Limiter now prevents any program-material signals exceeding this level from being sent to thesubwoofer.CONFIGURING THE BASS LIMITERFrom the menu, use the remote’s [Cursor ] and [Enter] keys to select the limiter setup> item. Using the same keys, set to “On” and to “On”; youwill hear a soft rumbling from your subwoofer. (If you do not hear sound from the sub, check yoursubwoofer audio and power connections, check Speaker Setup, below, and/or check the subwoofer’sown “hardware” control settings)Now use the remote’s [Cursor ] keys to move to the item, and [Cursor ] todecrease the limiter setting by 1 dB increments. As you do, the test-noise from the subwoofer will increasein level. Listen for the point at which audible distortions (harshening, “clacking,” “chuffing,” or otherextraneous elements) become evident, then use [Cursor ] to return (increase) the limiter level by 1or 2 dB until the distortion ceases. This establishes the “distortion-free” limit for your current subwoofersetup. It is advisable to return and re-check your Bass Limiter setup after you have completed the LevelSetup routines (see below).• Even after the Bass Limiter is set you may usefully engage its test-noise to “search and destroy” theroom-rattles that are inevitably excited by high-level subwoofer output. (Window-treatments,electrical wall-plates, and hanging artwork are three common sources.)• Should you ever change subwoofers, or reposition your current subwoofer or listening position, youshould repeat the Bass Limiter setup routine.• With a high-performance subwoofer, this routine can get rather loud. It is often best to await anopportune moment when spouses/children/pets are not at home to perform Bass Limiter setup fully.ENGLISH FRANÇAIS DEUTSCH ESPAÑOL ITALIANO PORTUGUÊS SVENSKA
