Pioneer SC-09TX Owner's Manual - Page 15

Simple Home Theater Guide 02 For other details, see Listening modes with different input signal formats on page 149. If the display does not correspond to the input signal and listening mode, check the connections and settings. 4 Use the volume control to adjust the volume level. Turn down the volume of your TV so that all sound is coming from the speakers connected to this receiver. Better sound using Phase Control and Full Band Phase Control This receiver is equipped with the two types of functions that correct phase distortion and group delay: Phase Control and Full Band Phase Control. Activating Full Band Phase Control is strongly recommended because it also involves the effects of Phase Control. For details on each of these two features, refer to the following explanations. Using Phase Control During multichannel playback, LFE (Low-Frequency Effects) signals as well as low-frequency signals in each channel are assigned to the subwoofer or other the subwoofer and the most appropriate speaker. At least in theory, however, this type of processing involves a group delay that varies with frequency, resulting in phase distortion where the low-frequency sound is delayed or muffled by the conflict with other channels. With the Phase Control mode switched on, this receiver can reproduce powerful bass sound without deteriorating the quality of the original sound (see illustration below). Phase Control OFF Front speaker Listening position Sound source Subwoofer Sound muffled due to a delay in time • Rhythms blurred and difficult to hear • Bass sound with loss of depth • Sound of musical instruments with no reality Phase Control ON Front speaker Listening position Sound source Subwoofer Original sound preserved with no loss of clarity • Rhythms with crystal-like clarity • Bass sound with no loss of depth • Sound of musical instruments with superb reality Phase Control technology provides coherent sound reproduction through the use of phase matching1 for an optimal sound image at your listening position. The default setting is on and we recommend leaving Phase Control switched on for all sound sources. SIGNAL SEL SLEEP DIMMER AUDIO SOURCE TV RCV SR+ SBch PHASE iPod CTRL DISP CH VOL VOL A.ATT GENRE HDMI OUT D ACCESS MCACC CLASS CH • Set the operation selector switch to RCV, then press PHASE (PHASE CONTROL) to select PHASE CONTROL. The PHASE CONTROL indicator on the front panel lights. Using Full Band Phase Control The Full Band Phase Control feature calibrates the frequency-phase characteristics of the speakers connected. Standard speakers designed exclusively for audio use generally reproduce sound with the divided frequency bands output from a speaker system consisting of multiple speakers (in case of typical 3-way speakers, for instance, the tweeter, the squawker (midrange), and the woofer output sound in the high-, middle-, and lowfrequency ranges, respectively). Though these speakers are designed to flatten the frequency-amplitude characteristics across wide ranges, there are cases where the group delay characteristics are not effectively flattened. This phase distortion of the speakers subsequently causes group delay (the delay of lowfrequency sound against high-frequency sound) during audio signal playback. Note 1 • Phase matching is a very important factor in achieving proper sound reproduction. If two waveforms are 'in phase', they crest and trough together, resulting in increased amplitude, clarity and presence of the sound signal. If a crest of a wave meets a trough (as shown in the upper section of the diagram above), then the sound will be 'out of phase' and an unreliable sound image will be produced. • The PHASE CONTROL feature is available even when the headphones are plugged in. • If your subwoofer has a phase control switch, set it to the plus (+) sign (or 0°). However, the effect you can actually feel when PHASE CONTROL is set to ON on this receiver depends on the type of your subwoofer. Set your subwoofer to maximize the effect. It is also recommended you try changing the orientation or the place of your subwoofer. • Set the built-in lowpass filter switch of your subwoofer to OFF. If this cannot be done on your subwoofer, set the cutoff frequency to a higher value. • If the speaker distance is not properly set, you may not have a maximized PHASE CONTROL effect. • The PHASE CONTROL mode cannot be set to ON in the following cases: - When the PURE DIRECT mode is switched on. - When the HDMI audio output parameter is set to THROUGH in Setting the Audio options on page 106. 15 En