I have a Carvin AC100...three channel...1 for microphone, one for bass or keyboard and a third for guitar, with a compatibility switch, so it will work with both piezo pick-up or magnetic.
I used this outside on a patio with arranger, nylon string and vocal mike for 5 years for an audience of 200 plus. Has a jack for a 2nd speaker. A 2nd 12" works great.
I replaced it with a more current model, with effects. This has no effects, but has an effects loupe and good reverb.
It has a 12" and line out. Current model is $449.00. I'd take $150.00 plus shipping.
Another option is to use a sans amp, directly into the PA. I have both bass and guitar models and use them all the time.
Check out the current AG 100. Mine is covered in conventional black fuzz finish. Been used , but works great with no tears, scars, etc.
Russ