| Depends - I am not totally familiar with your amp, but the limiter can either be a part of the power supply (I have one on my power amp) that prevents distorted signals from coming out of the amp, and thus saves your speakers wear and tear OR (and this is more common) it is the light that indicate whenever your onboard compressor is being used. If you have a 'threshold' knob, try playing with that and seeing how the limiter light's activities change. Basically, your threshold will set the signal level at which your compressor will kick in...
Ok, I didn't write it as if you were a 4 year old, but that's the best I can do...
__________________
I like soap, I like owls.
| 
