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Equipped with a three-band EQ and a variable compressor, the PortaFlex PF-500 from Ampeg is a 500W RMS amplifier head designed for bass guitar. Augmenting the EQ's functionality are Ampeg's proprietary Ultra Hi/Lo settings, as well as a five-way midrange selector, giving you different frequency choices for midrange manipulation from 220 Hz all the way up to 3 kHz.
Neutrik speakON and 1/4" jacks provide dual outputs to cabinets, while a XLR line out allows you to port sound directly into a console or PA—providing you with a ground lift, a -40 dB pad, and a pre/post EQ option to boot.
Should you wish to loop in outboard effects via the rear-panel, the PF-500 sports a FX knob for blending exterior processing to taste. Additionally, a 1/8" headphone out allows you to monitor your signal privately, while a 1/8" stereo auxiliary input affords you the ability to play line-level signals through the amplifier.
500W into 4 ohms or 300W into 8 ohms
Dual JFET preamp
On-board variable compressor
Ampeg's proprietary Ultra Lo and Ultra Hi options
3-band EQ with 5-way midrange frequency control
FX mix control
Dedicated tuner output for uninterrupted signal flow, if preferred
Footswitch jack for controlling mute and FX on/off (dual footswitch not included)
SpeakON and 1/4" output jacks
XLR Line Out featuring pre/post EQ, -40 dB pad, and ground lift