Yamaha AX-1070 Owner's Manual page 11

Using the PURE DIRECT switch
You can enjoy the purest possible sound from your audio
sources by setting this switch so that the indicator illuminates.
By doing so, the audio signal bypasses the BASS, TREBLE,
BALANCE and LOUDNESS controls, the SUBSONIC FILTER
switch and the PRE OUT/MAIN IN terminals, eliminating any
alterations to the audio signal.
Setting the SUBSONIC FILTER switch
If you set this switch to "ON" position, undesirable ultra-low-
frequency signals caused by turntable rumble or warped
records can be cut out without losing sound quality.
SUBSONIC
FILTER
When you listen with headphones
Connect the headphones to the PHONES jack. When listening
with headphones privately, set both the SPEAKERS A and B
switches to the OFF position.
PURE
DIRECT
ON
OFF
PHONES
Setting the PHONO switch
Select either MM or MC position depending on your PHONO
cartridge, Moving Magnet or Moving Coil type. However, if you
use a high output MC cartridge, select MM position.
Setting the MODE switch
<
For AX-1070 only
This switch can be used for switching between stereo and
monaural operation. Normally this switch should be set to the
STEREO position.
MODE
PHONO
MC
MM
>
MONO
STEREO
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