Aiwa AV-D25 manual Adjusting Speaker Level Balance, Dolby PRO Logic Phantom mode

ADJUSTING SPEAKER LEVEL

BALANCE

1

2,4

3

1 3

The unit is equipped with a built-in test signal generator called a noise sequencer for easy balance adjustment of all five channels. The sequencer outputs a noise signal that “travels”from channel to channel, enabling the simple adjustment of sound level to achieve the same apparent loudness, at your listening position, from each channel.

1 Select the Dolby Pro Logic mode according to your current type and placement of the speakers.

(See page 13.)

2 Press the MANUAL SELECT button and hold it down for about two seconds until “L/R OdB” appears.

A noise signal is sent to each channel in turn as follows:

DOLBY PRO LOGIC NORMAL or WIDE mode

+

IJR OdB(Left front speakerT1

+

CEN OdB (Center speaker)

4

UR OdB (Right front speaker)*l

+

S-R OdB (Right surround speaker)”z

4

S-L ?dB (Left surround speaker)* 2

DOLBY PRO LOGIC PHANTOM mode

r UR OdB*l + UR OdB*l

S-L 0dB*2~ S-R 0dB*2 d

3 STEREO NORMAL or WIDE mode

~UR OdB*’+ CEN OdB + UR 0dB*17

‘1 “L”or “Rflashes to indicate one of the front speakers from which the noise signal is output.

*2 The noise signal is output from the L and R surround speakers at the same time.

3Adjust the sound level of the center and surround speakers.

While “CEN”,“S-L’or “S-R”flashes in the display, press the UPA or DOWNY button so that the sound level of the center or surround speakers matches that of the front speakers.

The balance of the front speakers can be adjusted as well while “UR is displayed.

4 Press the MANUAL SELECT button again to stop the noise signal.

m

When adjusting the speakers level balance of the Dolby Pro Logic, those of the DSP and 5.1 CH modes are also changed.

About the channels

The left and right speakers create the stereo effect.

The center speaker helps achieve precise sound positioning over a broad sound field.

The rear-mounted surround speakers enhance the “depth”of

the sound field.

To change the surround speakers delay time of the Dolby Pro Logic mode

The surround speakers reproduce sounds a split second after the front speakers. The delay is initially set to 20 ms (milliseconds).

To change this standard delay time, press the MANUAL SELECT button repeatedly so that “SUR”is displayed. Then, press the UPA or DOWN~ button. Each time one of the buttons is pressed, the delay time changes as shown below.

+15ms-20’ms 4+30ms +

To adjust the speakers level balance while listening to the source (Dolby Pro Logic and 5.1 CH modes)

The speakers level balance can be changed after adjusting it with the noise sequencer. The balance can be changed whenever the Dolby Pro Logic system is turned on or the 5.1 CH function is selected.

1Play a disc or video software recorded in Dolby Pro Logic or Dolby Digital Surround.

2Press the MANUAL SELECT button repeatedly so that ‘W!”, “CEN”,“S-P’or “S-R appears on the display.

3Press the UPA or DOWNV button while the speaker name to be adjusted is displayed.

ENGLISH 14