Features of the Horizon SL2 Mic/Line Passive Direct Box:  The Horizon SL-2 Straightline-2 has every feature that the Horizon SL-1 Passive Direct Box offers plus a -20db pad switch so you can plug any instrument or most "hotter" line level sources into it. If the signal that the mixer console receives is overridden, simply flip the -20db pad switch and it will filter the input signal down to a better level. Both the Horizon SL-1 and the Horizon SL-2 are built in an 18 gauge formed steel box. The connectors and switches are recessed to resist damage.