Check the listing for details. Radial Engineering EXTC 500 Reamp Guitar Effects Interface. Condition: New. Listed at 359.99 USD. The Radial EXTC is a 500 series module that lets you incorporate guitar effects into the realm of pro-audio recording. Just imagine¦ add a touch of grit to a vocal track, some wah on a kick drum, maybe flange a violin¦The EXTC is a creative tool made for your esoteric-inventive side, ready to unleash fresh new sounds that will make your recordings stand out from the crowd. And it's super easy to use: connect a line level signal from the recording system. The EXTC unbalances the signal and converts it to high impedance where guitar pedals can be inserted at will. Front mounted ¼" send & receive connectors provide easy access. Turn track on, set levels, adjust the blend for just the right amount of magic. Be prepared for instant amazement.