ADA GCS-2 Guitar Cabinet Simulator This is a guitar cabinet simulator with a very easy-to-use analog circuit. Manufacturer's product page: http://www.electroharmonix.co.jp/ada/gcs2.html You can play and record with a sound as if you were using an amp head with a speaker and a microphone, without using a power amp, speaker cabinet, or microphone. The sound and dynamics are very realistic, just like the sound you hear on CDs. It's very easy to use. There are only four switches and one knob. With analog natural resonance technology, it faithfully reproduces not only the frequency but also the nuances of the speaker, adding a natural depth to the core of the guitar's tone. *It seems production ended last year, so it may be difficult to obtain in the future. This is an item for the main unit only, but the power supply is 9VDC 100ma, so it will work with a 9V adapter or power supply for effects pedals.