Audio Settings Menu; Input-Specific Settings Menu - CH P10 User Manual

7.2 Audio Settings menu

Mute
Mutes or unmutes the audio output.
Phase polarity
Allows you to reverse the absolute phase of the audio output.
Phono EQ
Optional Curves and Neumann Pole
The P10 gives the owner the opportunity to use alternative EQ curves for record replay. This requires the
fitting of the EQ option boards, which can be done at the time of purchase or added later. In addition to the
standard RIAA curve, the option boards add specific curves for older EMI, Columbia, Decca, Teldec/DGG, NAB,
Capitol/AES and Philips recordings. In addition, users can choose to add the Neumann pole to the RIAA or any
optional curve if desired (see below).
The Neumann Pole
As noted above, cutting lathe manufacturers often added a high-frequency pole to their lathe electronics, to
help prevent overheating and ringing in the cutter head itself. Although there is little detail as to the exact
measures taken by the various lathe manufacturers, it is generally accepted that in many cases it was some
variation on a 50kHz pole – a solution that has become known as the 'Neumann Pole'. The P10 makes it easy
to select the 50kHz roll-off for any disc or curve on a record-by-record basis. Selecting the Neumann pole can
have a significant sonic affect on some records and is well-worth experimenting with.
Channel mode
Left and right input signals can be summed together to generate a monaural signal. Default value of this
parameter is stereo. Obviously, this feature is not available with a four chassis, true monaural P10 setup, as
there is no easy way to combine the monaural channels of the left and right P10 chassis.
Feedback
Selects if the P10's output stage features local or global feedback.
Local feedback setting (the default setting on the P10) allows greater dynamic and musical freedom.
Global feedback setting delivers greater control and precision. When selected, GLOBAL-FB shows in the status
display screen.
We recommend comparing them and selecting the one you enjoy the most in your system. Your preferred
choice may vary with the music program chosen.

7.3 Input-specific settings menu

This menu allows you to set individual parameters for the inputs that you are using and disable any inputs that
are not in use.
Type
Disabled or normal. (Disabling an input removes it from the switch cycle, but also shuts down its associated
power supply, reducing power consumption.)
Gain
Sets the gain at 1kHz for each input according to the connected cartridge (see additional guidance in section
10 below).
Impedance
Set the impedance for each voltage mode input (MM/MC 1 or 2) according to the connected cartridge (see
additional guidance in sections 10.2 and 12 below).
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