Nady Systems PAS-250 Owner's Manual - page 6

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• Master volume (2) controls the level of the main power amplifier. 

NOTE: The MaxTower can be set to very high sound levels. To protect 

the system from damage, included is an active protection circuit. At high 

sound levels this active protection will lower the output until the volume is 

adjusted.

CONTROLS AND CONNECTIONS

• The front panel has 2x combo XLR-¼ (8) input jacks for the following 

inputs: ¼” instrument level, ¼” line level, XLR dynamic microphone, XLR 

condenser microphone, & XLR line level

• 10dB attenuation pad button (7) next to each input jack to best 

match the level of each input source. 

• Phantom power button (9) switches on and off 48VDC phantom 

power to both channels simultaneously for using a condenser microphone 

with an XLR plug. NOTE: Sending 48VDC phantom power to the XLR plug 

of a dynamic microphone will not typically harm the microphone. However 

to avoid possible damage, we recommend that you verify this for any 

specific dynamic microphone prior to using phantom power.

• Gain adjustment knob (6) adjusts the input sensitivity. NOTE: The 

gain knob can be used to avoid distortion and feedback with high level 

signals. It is best to begin with the gain lower to avoid damaging the 

power amplifier section. 

• Reverb knob (5) is used to control the level of reverb for each channel. 

• EQ knob (4) adjusts the low & high frequencies. Top center (detent 

position) enables flat operation (no EQ effect). Turning the knob to the 

right increases the level of treble and reduces the bass level. Turning the 

knob to the left increases the bass level and reduces the treble. 

• Mute button (3) mutes both channels. A small red LED is on when the 

mute is active.  The mute button shuts off the signal to both the internal 

power amplifier and to the rear line output, so that inputs can be swapped 

or instrument or mic adjustments can be made without unwanted noise.