During this past trip in Iceland I had the opportunity to play my electric violin in front of Gilla Grill, owned by my friend Thorgils, to release the sound of heaven into the open air, and bless the customers and passer-by's.
As you can see from the pictures, I was playing along with instrumental music from my laptop. I had a pair of USB speakers that was plugged into my laptop, and I mic'ed the USB speakers with a vocal microphone, which was connected to the acoustic amp, which my electric violin sound came out of also.
With this setup, we had great amplification, and many people came by to listen (and to buy hot dogs!). That first time I played at Gilla Grill, was the best day they ever had (with the most customers) up to that point. Praise the Lord! May God continue to bless Thorgils and Gilla Grill.