|This Marshall AS100D Acoustic Combo Amp is the one to have. Specially designed for use with a variety of acoustic instruments with or without pickups. Its four channels give you the flexibility to handle piezo transducers or magnetic pickups, a mic for vocals or instruments, and external audio equipment via a phono input channel. Channels 1 and 2 have separate EQ and level controls but also may be linked. 2x50W stereo power gives you plenty of oomph for stage performance, and a balanced line out allows direct connection to a PA. The Marshall amp has a built-in digital reverb, delay, and chorus that add dimension to your sound, and a balanced parallel effects loop with level is included. Anti-feedback controls include a phase switch and notch filters for each channel with selectable extra notch depth for channels 1 and 2.