Some guitar amps and keyboard or other instrument amps may just have a SPEAKER OUT jack(no direct out)--that is what you would use the speaker-out level DI for..so you can get the signal from an amplified source to your console to mix without destroying your channel or console. Why you would use it over a mic on the amp or a DI between the guitar(or other instrument) and amp is up to you and the situation at hand...avkid said:
typically its on older (or cheaper) guitar amps, and occasionally on some Leslie amps/speaker boxes where they chain the outputs to other cabinets...avkid said:
Which is why I would never agree to have my guitar plugged into a DI when I played. I had a valve pre amp and a valve head, so I didn't want just the pick up output sent to FOH. It was either mic up my quad box or I'll just turn it upAndy_Leviss said:Why would you use a DI after the amp instead of before it?
It's a tone thing; often effects such as distortion and just the general tonality created by the circuitry in the amp (especially a tube amp) are desired in the reinforced sound, but for reasons of stage noise or other concerns, mic'ing the amp isn't the best option. So you can take the speaker level out of the amp and get the sound of the amp, rather than just the dry sound of the guitar.
It's a way of achieving a similar effect to an amp simulator like a Line 6 Pod (albeit without the cab and mic simulations) in the analog world.