On the Tone Block 202, there are two methods in which you can run your signal into an alternative source (PA, mixer, etc.). There's the SIG OUT on the front of the amp and the DIRECT OUT on the back of the amp.
They both function similarly, so what's the difference between the two?
SIG OUT- Sends a balanced, TRS line-out that is not affected by the MASTER setting. the Sig Out also has cab sim on the FULLQ and VINT settings.
DIRECT OUT- Provides a mic-level, isolated signal that may be used instead of placing a microphone in front of the speaker. The signal matches the level of typical mics. Instead of cab sim, it uses the speaker as part of the tone-shaping system.
The Sig Out is ideal for “silent stages” where the speaker is not desired. It is also useful so you can run your amp for the "house feed" and you can use your speaker cabinet as a monitor.
NOTE: The Overdrive 202 does not feature Direct Out. It only features the Sig Out.