shunt

Hello all, I am going to be adding an analog ammeter to my audio setup soon. The one I picked out has a range of 0-300A which is a little more than I need, for headroom. Both the shunt and the meter are rated for 75mV also. Will this work if installed in parallel on the amp's ground wire? Want...

I got one of those cheap 3.5in volt/amp meter. Considering the price, I am not expecting much. But, it came with a shunt that will need to go right in the middle of my power cable. I was wondering if anyone had any experience with this or any input? If I install this shunt will there be a...