Before operating the auto ta and eq, Function, Audio adjustments – Pioneer DEX-P99RS User Manual

Page 35: Before operating the auto ta and eq function

WARNING

! To prevent accidents, never carry out auto TA

and EQ while driving. When this function
measures the car interior acoustic character-
istics to create an auto-equalizer curve, a loud
measurement tone (noise) may be outputted
from the speakers.

! Be sure to connect the high-range speakers to

the high range output. If the speakers are not
connected correctly, they may be damaged by
the low frequency measurement tone.

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 mid-range speaker is con-
nected to a subwoofer output.)

— When a speaker is connected to a power

amp delivering output higher than the
speaker

’s 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.

! When tweeters and super-tweeters are con-

nected to this system, be sure to use the
super-tweeter

’s cross-over network.

! When tweeters and super-tweeters are con-

nected to this system, auto-time alignment
and auto-equalizing may not operate properly.
In this case, manual adjustment is needed.

Before operating the auto TA
and EQ function

! Check the speaker’s usable frequency

range. Then connect the proper speakers to
high, mid, low or subwoofer outputs. If the
speakers are not connected correctly, auto-

time alignment and auto-equalizing may
not perform properly.

! 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 the speakers activated in the initial

setting menu are not connected, auto TA
and EQ cannot be carried out.

! When the mid range speaker units are

muted, auto TA and EQ cannot be carried
out. (Refer to the next page.)

! 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 amp

’s 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.

Audio Adjustments

Section

Audio

Adjustments