Pioneer SC-25 Instructions d'exploitation télécharger pdf (Page 73)

The Advanced MCACC menu

is not necessary if you’re satisfied with these

settings.

3 If you selected ‘Reverb Measurement’,

select EQ ON or EQ OFF, and then START.

The following options determine how the reverb

characteristics of your listening area are dis-

played in Reverb View:

! EQ OFF – You will see the reverb

characteristics of your listening area without

the equalization performed by this receiver

(before calibration).

! EQ ON – You will see the reverb

characteristics of your listening area with the

equalization performed by this receiver (after

calibration). Note that the EQ response may

not appear entirely flat due to adjustments

necessary for your listening area.

— The calibration corresponding to the

currently selected MCACC preset will be

used when EQ ON is selected. To use

another MCACC preset, press MCACC to

select the MCACC memory you want to

store.

— After auto calibration with EQ Type

: SYMMETRY (Full Auto MCACC,

etc.), the graph for the inferred reverb

characteristics can be displayed by

selecting Reverb View. To display the

actually measured reverb characteristics

after EQ calibration, measure with

EQ ON.

When the reverb measurement is finished,

you can select Reverb View to see the results

on-screen. See Professional Calibration EQ

graphical output on page 87 for troubleshooting

information.

4 If you selected ‘Reverb View’, you can

check the reverb characteristics for each

channel. Press RETURN when you’re done.

The reverb characteristics are dis-

played when the Full Auto MCACC or

Reverb Measurement measurements are

conducted.

Use k/l to select the channel, frequency

and calibration setting you want to check. Use

i/j to go back and forth between the three.

The reverb characteristics graph before and

after EQ calibration can be displayed by select-

ing Calibration : Before / After. Note that the

markers on the vertical axis indicate decibels in

2 dB steps.

5 If ‘Advanced EQ Setup’ is selected,

select the MCACC memory to be stored,

then enter the desired time setting for

calibration, and then select START.

! To specify the place where the MCACC

memory is to be stored, press MCACC to

select the MCACC memory you want to store.

Based on the reverb measurement above, you

can choose the time period that will be used for

the final frequency adjustment and calibration.

Even though you can make this setting without

reverb measurement, it is best to use the mea-

surement results as a reference for your time

setting. For an optimal system calibration based

on the direct sound coming from the speakers,

we recommend using the 30-50ms setting.

Use k/l to select the setting. Use i/j to

switch between them.

Select the setting from the following time

periods (in milliseconds): 0-20ms, 10-30ms,

20-40ms, 30-50ms, 40-60ms, 50-70ms and

60-80ms. This setting will be applied to all

channels during calibration.

When you’re finished, select START. It will take

about 2 to 4 minutes for the calibration to finish.

After the Acoustic Calibration Equalization is

set, you are given the option to check the set-

tings on-screen.

Precision Distance

SC-57 only

Before using this function, perform the Full

Auto MCACC Setup procedure (see page 32).

Performing the Full Auto MCACC procedure

corrects the distance to a precision of 0.5 inch,

but the Precision Distance function lets you

adjust the distance to the speakers (their posi-

tion) with a precision of under 0.5 inch. Here,

rather than correct the numerical value of the

distance, actually move the physical positions

of the speakers to fine-adjust (the subwoofer

cannot be adjusted). The input from the micro-

phone is indicated on the screen. Fine-adjust

the positions of the speakers so that the gauge

reading is maximum. The detailed distance

adjustments that were previously performed by

skilled installers by ear can easily be performed

watching the gauge on the monitor. Place the

microphone in the same position as when the

microphone was connected and the Full Auto

MCACC operation was performed.

1 Select ‘Precision Distance’ from the

Manual MCACC setup menu.

2 Fine-adjust the positions of the

speakers in sequence, starting from the

front right channel.

Test pulses are output from the speaker for the

selected channel and from one other speaker.

Move the position of the selected speaker 0.5

inch towards or away from the microphone.

Watch the screen when doing so, and fine-

adjust the positions of the speakers so that the

gauge reading is maximum. Also, the channel

serving as the standard differs according to

the channel being adjusted. Do not move the

speaker serving as the standard channel.

The maximum gauge reading is 10.0. (If the

reading stays under 10.0, adjust the speaker for

the maximum value.)

! If the microphone is placed in a different

position from when the Full Auto MCACC

or Auto MCACC procedure was performed,

it may not be possible to adjust properly. In

this case, we recommend performing the

procedure at Fine Speaker Distance on page

71 in the Manual MCACC measurements,

then performing the adjustment described

here without moving the microphone.

! The adjustment here is for adjusting for

an error of 0.5 inch or less (not adjustable

with the Auto MCACC Setup). 0.0 may be

displayed after distance correction with the

Auto MCACC Setup, but even in this case

this adjustment allows you to optimize the

correction. Note that if the Auto MCACC

Setup is performed after completing the fine-

adjustment here, the correction precision will

drop to about 0.5 inch.

! Like with the Auto MCACC Setup, perform

this adjustment in as quiet an environment

as possible. 0.0 will be displayed if abrupt

noise is input during the adjustment.

! The distance for all the channels can only

be made uniform even if the R (front right)

channel is adjusted in the proper order.

! Be very careful not to tip the speakers over

when moving them.

! The result of the adjustment performed

here can be checked by listening to the test

pulses output at the Precision Distance (the

test pulses will be more centrally positioned

between the speakers than before the

adjustment was performed). Be careful not to

change the distance values at this time.

3 When you’re finished, press RETURN.

You will return to the Manual MCACC setup

menu.

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Pioneer SC-25 Instructions d'exploitation Page 73

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