all the ports look like they are a mono connection, so doesn't look promising man. As the SL1 is all stereo in and out (L+R) and all the connections on the back of this are just the one mono plug, to get it all to work i think you would need a bunch of stereo to mono cables/adapters (not exactly sure if this would work, or if they even exist) Even if it did work, i don't think it would work too well. I'd suggest to try and pick up a newer mixer with stereo connections to use.. Even if it is a cheaper one, or a used one. What cd players/turntables are you using with it?