PF-350 / PF-500 Bass Guitar Amplifier

PF-350 Front Panel

PF 350

-15dB

peak

 

 

 

 

 

 

 

 

limit

fault

audio phones

 

 

 

 

 

 

 

 

 

 

 

 

in

 

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input pad

gain

 

 

bass

midrange

treble

volume

limiter

 

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1.INPUT: The signal output from an instrument (active or passive) may be connected to this 1/4" input by means of a shielded instrument cable.

2.–15 dB PAD: Press this switch in to reduce the input signal by 15 dB and compensate for higher output sources. This attenuation is suited for use with basses that have active electronics or high-output pickups. Use this pad if you notice that the peak LED [3] comes on regularly. It will reduce the chance of overdriving the preamplifier stage, and allow more usable range and fine adjustment of the gain control.

3.PEAK LED: This red warning LED will

come on if: the input signal is too high, the gain control is set too high, or there is too much boost from the bass, midrange and treble controls. If it comes on regularly, even when these controls are low, try engaging the –15 dB

pad [2].

4.GAIN: This varies the amount of signal driving the preamplifier. If a small clockwise rotation from minimum leads to overloading and the peak LED illuminating, try engaging the –15 dB pad. This will give more usable range with the gain control.

5.BASS: Use this to adjust the low frequency level of the amplifier. This provides up to 14 dB of boost, or –12 dB of cut at 40 Hz. The low frequency output is flattest at the center position.

6.MIDRANGE: Use this to adjust the midrange frequency level of the amplifier. This provides up to 5 dB of boost, or –13 dB of cut at 500 Hz. The midrange frequency output is flat at the center position. Rotate the control counter clockwise for a “contoured” sound (more distant, less midrange output) or clockwise for a sound which really cuts through.

7.TREBLE: Use this to adjust the high frequency level of the amplifier. This provides up to 19 dB of boost, or –25 dB of cut at 8 kHz. The high frequency output is flattest at the center position.

8.VOLUME: Use this to control the overall output level. It affects the speaker outputs and preamp level to the headphone output. Use it wisely, and turn it down when making connections, putting on headphones, or trying something new.

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