Carl Martin Headroom Spring ReverbThe Carl Martin Headroom is the most simple to operate reverb pedal on the market with a couple extras. This purely analog 'real spring' reverb has two identical channels, each with tone and level controls to select the depth and tone of your reverb. This allows you to have a soft, small room reverb on Channel A and a much more dramatic and dark large room reverb on Channel B (or vise versa) The two foot controlled switches control which channel you