Advertisement
CONTROLS AND THEIR FUNCTIONS
®
SPEAKERS switch
OFF —
This position silences all speakers for private head¬
phones listening.
A —
Activates speakers connected to the "A" speakers
terminals on the rear panel.
B —
Activates speakers connected to the "B" speaker
terminals on the rear panel.
A+B —
Activates simultaneously two sets of speaker sys¬
tems connected to the
"A"
and "B" speaker terminals.
(D
POWER switch
ON — This position turns the amplifier on.
The pilot
lamp lights when the power is on.
Also controls the AC
outlet marked SWITCHED on the rear panel.
OFF — This position turns the amplifier off.
®
PHONES jack
Plug a stereo headphones into this jack.
For private listen¬
ing through headphones, set the SPEAKERS switch to the
OFF position.
®
TONE switch
In position DEFEAT, the bass and treble controls do not
function.
By switching between
DEFEAT and ON, this
enables you making frequency response measurements of
phono cartridges, loudspeakers and the acoustic conditions
of the room.
®
FILTER switches
SUBSONIC - Frequencies below 20 Hz are attenuated by
6 dB/octave.
Although such subsonic frequencies are in¬
audible to the human ear, they can cause intermodulation
distortions and even damage to the loudspeakers.
It is
recommendable to set the button ON at all times, even if
no record rumble etc. is heard.
OFF —
No attenuation of subsonic frequencies.
HIGH — Setting this switch to ON reduces any high fre¬
quency noise, such as tape hiss, record scratch, etc.
Frequencies above 8 kHz are attenuated by 6 dB/octave.
®
ATTENUATOR switch
Set to —20 dB to attenuate the audio output by 20 dB.
This convenient feature saves having to disturb the VOL¬
UME control, for example, when answering the telephone.
®
VOLUME control
Adjusts output level to speakers and headphones.
Scale is
graduated in dB, and when used in conjunction with the
ATTENUATOR, fine adjustment can be obtained.
®
LOUDNESS Switch
The LOUDNESS switch boosts bass response to compen¬
sate for the human ear's lack of response to those fre¬
quencies at low volume levels.
Set it to your own most satisfactory listening level.
Switch positions and functions are as follows:
"OFF"_Flat
"1"
.+3 dB at 100 Hz
"2"
.+6 dB at 100 Hz
8
KA 7100(K)
Advertisement
