Point the mic vertical towards ceiling in your chosen listening position, about ear height. It's all in the 'getting started' help file.

So, you need to connect Right line in to line out first, to loop the signal and create a Cal file for the 'soundcard', separate to the mic cal file. The default for REW is to use the right channel for measuring. However, do you have any way to connect line out to line in on your laptop to calibrate the soundcard? Laptop soundcards are not noted for their quality. My Sony Vaio Laptop has a dedicated Mic input, so I guess I will not need any Mic preamp for using the ECM-8000? If I was to measure one speaker at a time, does the Mic need to point flat to the centre of the front-wall, or point towards the top of the front-wall, or point towards the speaker being measured?Hi Jolida 1. At this stage, I need to know two things- 1. I have downloaded its Generic Calibration file from the Downloads section of HomeTheaterShack & loaded it into REW. Regarding microphone orientation when measuring and the Behringer ECM-8000. It also needs a preamplifier so the best option is to purchase a cheap interface with a preamp that offers phantom power. My Sony Vaio Laptop has a dedicated Mic input, so I guess I will not need any Mic preamp for using the ECM-8000? If I was to measure one speaker at a time, does the Mic need to point flat to the centre of the front-wall, or point towards the top of the front-wall, or point towards the speaker being measured?The ECM-8000 is a condenser microphone and thus needs phantom power (15-48 V) to operate.

Ecm8000 microphone