Spider Jam Guitar/Combo Amplifier 100 Endless Jam Tracks, 12 Amp Models, even Smart Control FX Amplifiers & Cabinets Th Line 6 SJ Spider Jam Guitar/Combo Amplifier gives every guitarist the boost the need. The Endless Jam Engine and onboard multitrack loop recorder gives you ackup by some of the best session aces in the country. The 75W power section and 12 Custom Celestion® speaker gives you the push you need to hit the stage and wow the crowd. Hundreds of preset, 12 distinctamp models, Smart Control effects and a built-in tuner give you the ability to create the performance of a lifetime.