Harman Kardon AVR 7550HD Owner's Manual

Also see for AVR 7550HD: Worksheet Quick start guide Service manual

33OPERATIONNow that you have installed your components and completed abasic configuration, you are ready to begin enjoying your hometheater system.TURNING ON THE AVR 7550HDFlip down the Front-Panel Door and press the Main Power Switchin. The Power Indicator on the front panel will turn amber, indicatingthat the AVR is in Standby mode and is ready to be turned on. TheMain Power Switch is normally left on.There are several ways to turn on the AVR 7550HD:a) Press the Standby/On Switch on the front panel.b) Using the remote, press the AVR Power On Button or any of theSource Selectors.To turn the receiver off, press either the Standby/On Switch on thefront panel or the AVR Power Off Button on the remote. Unless thereceiver will not be used for an extended period of time, leave theMain Power Switch on. When the Main Power Switch is turned off,any settings you have programmed will be preserved for up to fourweeks.IMPORTANT NOTE: If the PROTECT message everappears in the Message Display, turn off the AVR and unplugit. Check all speaker wires for a short. If none is found, bringthe unit to an authorized Harman Kardon service center forinspection and repair before using it again.VOLUME CONTROLAdjust the volume either by turning the knob on the front panel(clockwise to increase volume or counterclockwise to decreasevolume), or by pressing the Volume Control on the remote. Thevolume is displayed as a negative number of decibels (dB) belowthe 0dB reference point.0dB is the maximum recommended volume for the AVR 7550HD.Although it’s possible to turn the volume to a higher level, doingso may damage your hearing and your speakers. For certain moredynamic audio materials, even 0dB may be too high, allowing fordamage to equipment. Use caution with regard to volume levels.To change the volume level display from the default decibel scaleto a 0-to-90 scale, adjust the Volume Units setting in the SystemSettings menu, as described on page 48.Dolby VolumeThe AVR 7550HD is one of the first products to implement DolbyVolume processing, which can improve the audio performance of thesystem by revealing subtle details even at normal home-listeningvolumes.One concern of the typical home theater listener is that volumescan vary widely for different programs played by a source, e.g.,television commercial advertisements are often much louder thanthe main feature. Another is that details heard in the recordingstudio at typically high reference volumes are lost at the lowervolumes used by many listeners.The AVR 7550HD uses two Dolby Volume techniques to addressthese issues. The Leveler module maintains a consistent listeningvolume within a source, e.g., while watching commercial televisionor while listening to different tracks on a USB drive. The Modelermodule endeavors to re-create the reference presentation thatwas heard in the recording studio without losing portions of theprogram at the typically lower volume levels often used in thehome. When the Modeler module is active, you may notice detailsof the performance that were hidden when the program was playedon other equipment.NOTE: The Dolby Volume processor is not used to levelvolume across sources. If one source sounds significantlylouder or softer than the others, compensate by adjusting theInput level from source setting in the Info Settings menu forthe source.To adjust the Dolby Volume setting, press the Audio Effects Button.A screen similar to the one shown in Figure 24 will appear. Movethe cursor to highlight the Dolby Volume setting, and each press ofthe OK Button will switch to one of the options in Table 3 below. Thesettings do not refer to the volume level, which is adjusted normallyusing the Volume Control, but rather to the amount of Dolby Volumeprocessing desired. See Figure 24.Figure 24 – Adjust Dolby VolumeTable 3 – Dolby Volume SettingsNOTE: Dolby Volume is compatible with sources recordedat a sampling rate of 48kHz. High-resolution sources, such asDTS 96/24, will be decoded at 48kHz. DTS 96/24 programswill be played in DTS 5.1 mode. To hear DTS 96/24 materialsin high resolution, turn off Dolby Volume.Dolby Volume Calibration OffsetCalibration Offset is a feature of Dolby Volume that allows you toadjust the calibration of the AVR 7550HD to optimally match yourspeakers and listening environment. The AVR 7550HD is calibratedwith the average speaker sensitivity in mind; however, differentspeakers may have different sensitivities. Use Calibration Offset toadjust the calibration of the AVR 7550HD according to the types ofspeakers you have.Setting EffectOff No Dolby Volume processingLow Only Dolby Volume Modeler module is activeMedium Both Modeler and Leveler modules are active;Leveler module has a value of 3Max Both Modeler and Leveler modules are active;Leveler module has a value of 9