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Pioneer SA-9900 Руководство по эксплуатации

EFFECTIVE

OPERATION

BASS & TREBLE TWIN TONE CONTROLS

'The twin control system is comprised of main and

sub controls. Using the main controls only will

adjust the audio ione in the same manner as

conventional tone controls. On the other hand,

'employing only the sub controls provides the same

function as-changing the turnover frequency, Com-

bined use of main and sub controls allows ep-

proximately 5900 tonal shades to be obtained.

[Adjusting the main contrel, than the sub central con provide tho

besusment shawn n he shaded areae cf Fia. 13.

ngs

>—

With the mnsin BASS and TREELE controls at Od2, sub contro!

ranges become a indicated by the shad areas of Fi. 14

Fig 4

'Typical Application

* BASS: Adjusting the BASS controls as shown

in Fig. 15 can exert a trimming effect to the

100Hz ~ 150Hz region by enkencing it in the

rango of 0.8 ~ 1.04B. This will add a slight body

to the low frequencies while retaining the over

all fiat feeling. The opposite effect can also be

achieved to improve unnatural low frequencies

such ag encountered in metal framed buildings

where 100Hz ~ 150H2 standing waves ar pro-

longed resonance are liable to occur.

———

To impart

a delicate body to lou Frequencies,

Fig, 15

shown in Fig. 16 can compensate for the

tendency of moving magnet (MM) type

cartridges to slacken at high frequencies. The

twin controls slightly enhance the 8kHz~ 10kHz

region, while returning to flat response at higher

frequencies to avoid unnatural peak boosting.

Compantion eure

Composite curve

Ccortridge raporst

Compensation for high frequency slackening cf card

Fig. 16

@ MIDRANGE:

Adjusting

both BASS and

TREBLE controls as shown in Fig. 17 has the

effect of relatively enhancing the midrange,

'This setting is effective for providing an audio

"close up" of a singer's voice, or a similar func.

tion,

—

Relatvaly hancira the midrange

Fig. 17

Sctting the TONE switch to OFF provides a com:

pletely flat response regardless of the tone contro)

settings. The different uses of each source and the

fine effect of the tone controls can be confirmed.