Pioneer VSX-819H Better sound using Phase Control, Other problems when using the Auto MCACC Setup

5 minute guide

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Other problems when using the Auto MCACC Setup

If the room environment is not optimal for the Auto MCACC Setup (too much background noise, echo off the walls, obstacles blocking the speakers from the microphone) the final settings may be incorrect. Check for household appliances (air conditioner, fridge, fan, etc.), that may be affecting the environment and switch them off if necessary. If there are any instructions showing in the front panel display, please follow them.

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).

P		Front speaker	Listening
H
A			position
S
E			?
C
O
N
T
R
O	Sound
L		Subwoofer
O	source
F

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•Some older TVs may interfere with the operation of the microphone. If this seems to be happening, switch off the TV when doing the Auto MCACC Setup.

Better sound 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 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.

P		Front speaker	Listening
H			position
A
S
E
C
O
N
T
R
O	Sound
L	source	Subwoofer
O

N

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.

			HDD	DVD	VCR	DISPLAY
RECEIVER	INPUT SELECT SOURCE		1	2	3
			S.RETRIEVER	EQ	CH SELECT	SLEEP
RECEIVER	ZONE 2	TV CONTROL	4	5	6	CH
	ON/OFF		SB CH	PHASE	MIDNIGHT
		INPUT
			7	8	9	CH
BD	TV	DVR	DIMMER	SPEAKERS		SHIFT
			+10	0	ENTER
			D.ACCESS

•Press RECEIVER, then press PHASE to switch on phase correction.

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Note

1Phase 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.

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