I was able to run some tests this weekend with a local band. Friday night, set one I ran the AD-20 and set two I ran the digi mod UA-5. The levels were run a little hotter on the AD-20, but other than that it was an 'apples to apples' comparison. Mics were set up FOH in a very shity spot (i.e. stage right of the stage right stack) running DIN, but I was just trying to compare the pre / AD's. Result: I liked the sound of the AD-20 better because it sounded warmer. The UA-5 probably captured a better dynamic range, but sounded a bit thin to my ears. Saturday night, I ran a matrix with the UA-5 and placed the mics in a much better spot. Result: Probably the best sounding recording I have ever done. I had planned on getting rid of one of them, but I think I will hang on to both for now and compare them again in a different setting.