The sound is excellent. If you add more gain, you'll get more noise, but that's true of any pre-amp.

It features exactly what they said it will. No EQ -- just gain/volume and two notch filters that WORK, plus a phase inverter switch that give you even more control over feedback.

Easy - just plug in, turn up JUST UNTIL you start to hear feedback. Then, turn the first notch filter until it goes away. Then continue to turn up until second feedback frequency occurs. Do the same with second noth filter.

Seems very well made and road worthy.

What are you waiting for? If you have bad feedback issues, GET THIS! Totally worth $100.

Don't know, but I hear they're easy to deal with.

Don't let excessive feedback ruin your gig. If you play an acoustic instrument (any), this will save your nerves. A must in the tool bag for any serious acoustic instrument player. I got it for Upright Bass (works great). I've also used it for acoustic guitar, resonator and ukulele. Works great on all of them.

Active full-time musician

swing, jazz, country, surf, reggae, blues and hodge-podge

Really quiet, and especially helps with boosting the signal.

Enough features for what it's supposed to do.

Super easy. Adjust your input gain, turn up the volume until just on verge of feedback. Adjust first "null" knob until feedback gone. Turn up volume again, and do same for secondary annoying frequency. Use "null" knob number two for that. Voila!

Excellent quality.

TOTALLY WORTH A C-NOTE!!

Never had to use, but a friend says they're good.

Great product, and worth the money.

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