Pioneer VSX-420-K: Using Phase Control

Listening to your system 04

English

Using Phase Control

This receiver’s Phase Control feature uses

phase correction measures to make sure your

sound source arrives at the listening position in

phase, preventing unwanted distortion and/or

Français

coloring of the sound (see illustration below).

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.

Phase Control technology provides coherent

Italiano

With the Phase Control mode switched on, this

sound reproduction through the use of phase

1

receiver can reproduce powerful bass sound

matching

for an optimal sound image at your

without deteriorating the quality of the original

listening position. The default setting is on

sound (see illustration below).

and we recommend leaving Phase Control

switched on for all sound sources.

Nederlands

• Press PHASE to switch on phase

Español

correction.

Deutsch

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VSX-420_SY_En.book 29 ページ ２０１０年３月１９日　金曜日　午前９時３７分

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Front speaker

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position

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Sound

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source

Subwoofer

Front speaker

Listening

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position

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source

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PORTABLE

TUNER

SIGNAL SEL

MIDNIGHT PHASE

S.RETRIEVER

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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.

• 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 MULTI IN input is selected.