Auto ta and eq (auto-time alignment and, Auto-equalizing) 80, Auto ta and eq (auto-time alignment and auto – Pioneer AVH-P7500DVD User Manual

Page 80: Equalizing), Audio adjustments, Before operating the auto ta and eq function

Advertising
background image

Auto TA and EQ (auto-time

alignment and auto-

equalizing)

The auto-time alignment automatically adjusts

the distance between each speaker and the

listening position.

The auto-equalizer automatically measures

the car interior acoustic characteristics, and

then creates the auto-equalizer curve based

on that information.

WARNING

To prevent accidents, never carry out auto TA and
EQ while driving. When this function measures
the car interior acoustic characteristics to create
an auto-equalizer curve, a loud measurement
tone (noise) may be output from the speakers.

CAUTION

! Carrying out auto TA and EQ under the follow-

ing conditions may damage the speakers. Be
sure to check the conditions thoroughly be-
fore carrying out auto TA and EQ.
 When speakers are incorrectly connected.

(e.g., When a rear speaker is connected to
a subwoofer output.)

 When a speaker is connected to a power

amp delivering output higher than the
speakers maximum input power capabil-
ity.

! If the microphone is placed in an unsuitable

position the measurement tone may become
loud and measurement may take a long time,
resulting in a drain on battery power. Be sure
to place the microphone in the specified loca-
tion.

Before operating the auto TA

and EQ function

! Carry out auto TA and EQ in as quiet a

place as possible, with the car engine and

air conditioning switched off. Also cut

power to car phones or portable telephones

in the car, or remove them from the car be-

fore carrying out auto TA and EQ. Sounds

other than the measurement tone (sur-

rounding sounds, engine sound, tele-

phones ringing etc.) may prevent correct

measurement of the car interior acoustic

characteristics.

! Be sure to carry out auto TA and EQ using

the supplied microphone. Using another

microphone may prevent measurement, or

result in incorrect measurement of the car

interior acoustic characteristics.

! When front speaker is not connected, auto

TA and EQ cannot be carried out.

! When this unit is connected to a power

amp with input level control, auto TA and

EQ may not be possible if you lower power

amp input level. Set the power amps input

level to the standard position.

! When this unit is connected to a power

amp with an LPF, turn off the LPF on the

power amp before carrying out auto TA and

EQ. In addition, the cut-off frequency for

built-in LPF of an active subwoofer should

be set to the highest frequency.

! The time alignment value calculated by

auto TA and EQ may differ from the actual

distance in the following circumstances.

However, the distance has been calculated

by computer to be the optimum delay to

give accurate results for the circum-

stances, so please continue to use this

value.

 When the reflected sound within a vehi-

cle is strong and delays occur.

 When delays occur for low sounds due

to the influence of the LPF on active

subwoofers or external amps.

Audio Adjustments

En

80

Section

15

Advertising