Ted,

I use a Boss TU-12H for my 34 string Celtic harp. The "H" refers to the top octave which isn't on the 12 model, so I need that for the harp. I have found it to be very good, except it does chew up batteries if I accidentally leave it on - or when I lend it to someone else and forget to check the power button, but I like being able to plug a lead into it from the pick up for noisy situations.

Helen