Features 35 Watts, 2 x 6L6 Pull Bright control Active Buffered Effects Loop Spring reverb with send and return controls Contour Description Product Description Best described as a "portable" Classic Reverb/Custom Clean hybrid, the Studio Pro offers ample clean headroom, dynamics, and a variety of tone shaping options. Two Rock has added a pickup loading feature, which optimizes pickup balance between single coil and humbuckers. Their stellar reverb circuit with send and return controls, contour control, and full buffered effects loop are standard on this amp.The new pickup loading feature control has 5 settings. In the first position(fully counterclockwise), there is no additional pickup loading, with 4 additional settings available. Fully clockwise(last position) is full loading. Loading the guitar pickup(s) to varying degrees changes the impedance relationship between the pickup and the amplifier's first gain stage. Loading reduces inductive "ringing" in the pickup coils. The effect is a more controlled high frequency response and a reduction in high frequency artifacts produced when a pickup's magnets and coils feed back with each other, usually at or near the pickup's saturation point. The damping effect will also reduce the gain, which is normal.Tonally speaking, reducing these artifacts results in a cleaner waveform and an apparent lack of harshness in the upper frequencies.