Yamaha AX-890 Owner's Manual page 9

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 signals bypass the BASS, TREBLE,
SUBSONIC FILTER, BALANCE, LOUDNESS controls and
the PRE OUT/MAIN IN terminals, thus eliminating any
alterations to the audio signals.
PURE
DIRECT
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.
PHONES
PHONO (MM/MC) 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.
To select the MC position, press this switch so that it is held
inward. To select the MM position, press this switch so that it is
released outward.
PHONO
Open/close the control door
When it is not necessary to operate controls inside the control
door, close the door.
To close the door
To open the door
MC
MM
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