First thing we need to do is establish where our speakers are and place the dynamic microphone (yep, we'll start with this one) on the center of the speaker. This will usually give you the brightest sound (as shown in video below).
If you're looking for a darker tone, then what we're gonna do is move the microphone from the center of the speaker to the outside edge.
Next step we wil try using the large-diaphragm condenser microphone - they're a little more sensitive than dynamic, that's why we'll move them back from the amp for about 4 inches. Again, to achieve the brightest tone you'll have to place on the center of the speaker, and for darker tone - move it to the outside edge.
If you're using a ribbon microphone, here's a thing to consider - ribbon mics are typically bidirectional, which means most of the sound will come form the amp side, but you'll also get some ambience from the room, which creates a more natural sound. As with the other mics, to adjust the tone from bright to dark, just move the mic from the center of the speaker to its edge.
It's not an uncommon thing to use multiple microphones - for example, you can use the large-diaphragm condenser microphone for recording ambient sound and dynamic microphone for recording direct sound from the amp. Combining these two will give you the best of both worlds - rich, full sound.
That's it for now - hope you enjoyed my article. Share your recording techniques in the comments below and keep rocking!