2
SWITCHES &
TERMINALS
1. V.U. METER
These two gigantic VU meters
allow easy reading of the output
level of the respective channels.
The meter shows an average output
level of the channel. The Meter
Sensitivity Selector (2) is provided
to enable reading of lower output
level. With this switch (2) un
pressed (OFF position), the 0dB
point of the meter scale corres
ponds to the output power of 100
watts (8 ohm loadsl. With this
switch (2) depressed (ON position),
at the -1 OdB point, the output
power of 10 watts (8 ohm loads).
For further details, see the "ON
OUTPUT POWER" section pre
scribed in this manual.
(This device is only for the 5M21.)
2. METER SENSITIVITY
SELECTOR
This oower amplifier is designed
to give the 100 watts per channel
(8 ohm) output oower. However
in actual use, driving of the amplifier
in the vicinity of its maximum
rating is rather seldom. Setting of
meter sensitivity to the effect that
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0dB indicates the maximum level
may be inconvenient since the VU
meter needle gives little or no swing
at lower output level amplifier driv
ing. For this reason, the Meter Sen
sitivity Selector is provided to boost
the meter sensitivity by l0dB in
dependent of the gain of the power
amplifier permitting reading of the
meter at lower output level. When
this Selector is at the "off" position
(not pressed in). the 0dB point of
the VU METER (1) scale is equiva
lent to lOOW/ch (8 ohm loads) and
when this selector is ON at -1 OdB
position (pressed in). the 0dB point,
10W/ch (8 ohm loads.l
(This device is only for the 5M21.)
3. HEADPHONE JACK
Connection of a stereophonic
headphone to this jack allows
private listening. Insertion of the
headphone plug into this jack auto
matically cuts off the speaker out·
puts.
4.DC OFFSET SENSOR/
PILOT LAMP
As this power amplifier adopts
the DC amplification circuitry,
V.U. METER 2. METER SENSITIVITY
(SM21)
SELECTOA
(5M21)
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