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SM58 handling noise

I have always been a fan of cheap knockoff mics that work well: Samson, Behringer, etc., but decided that since I am pursuing serious recording endeavors now, that I should pony up and buy a 58 for once. I beatbox and make wacky noises while doing silly things with my mic and cord when I play live, and i've never had a unreasonable problem with handling noise, although it existed.

Help me decipher these testing figures on NOS tubes?

Hi

Just wondering what the figures for tests on tubes represent, and what are good figures?

Below I have two examples of testing figures for matched pair tubes. Which are the better performing tubes, and why?

1. Tested : 13.5/11.8-12.4/11.2 7LC delta 0C1

13.1/11.4-12.5/11.4 7LG delta OC1

2. Tested : 9.8/9.8-9.5/9.5 7xx delta9A2

Logic express 7

I just got logic express 7 and for some reason I can't get any audio anywhere to come out. I haven't recorded anything but I was just looking through the loop samples and none of them are preview playing for me has anyone had the same problem or a similar problem and know how to fix it? Thanks