The Levels tab sets the input and output levels, limiter functions, channel link and phase (polarity) reverse.

To set Input or Output levels, click/tap on faders and drag to the desired level.
Alternately, use the keyboard to enter level values in the window below the fader on the keyboard.
Input and Output levels are displayed on the associated meters; a peak-hold line shows above the instantaneous levels.

Limiter - The IPD is equipped with a built-in limiter calculator that allows the user to enter the desired output power at a given impedance.
It is also possible to adjust the limiter by clicking/tapping the Limiter fader and dragging it to the desired threshold position, or by entering the desired Vpk or dBu value:

a. V peak - Sets the peak voltage at the output to where limiter should take effect.

b. Ohm - Enter the Nominal impedance of the loudspeaker for accurate display of Output Power (Watt).

Default value is 4 ohms. A 2 ohm setting will result in lower allowed maximum power according to the capability of the amplifier.
This setting avoids current clip, ensuring best possible sound when reaching the clipping threshold.

Note: There is no auto-detection of the loudspeaker impedance; therefore, the user must set the proper impedance for an accurate reading of values on the other parameters.
However, the function of the limiter is not affected by the nominal impedance entered.

c. Watt - Sets the maximum output power before the limiter action takes effect.

d. dBu - Sets the maximum output in dBu before the limiter action takes effect.

Limiter meter display - The display shows gain reduction with a peak hold line.
Note: When limiting is active, the peak hold line on the output meters changes to yellow to indicate peak limiting is in effect.

EQ DLY button - Click/tap to bring up the Input EQ tab for the input(s).

LINK button - Click/tap to link the two Input (Stereo mode only) or Output channels. When Link is active, all settings in Channel 1 are automatically copied to Channel 2.

PHASE button - Toggles between PHASE NORMAL and PHASE REVERSE to reverse the phase (polarity) of the output signal.