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Marshall MS-2 Standard Micro Amp
From the manufacturer: 1 Watt of gut-wrenching power featuring: channel switching, a battery and a headphone jack that doubles as a preamp out, so you can rock while you roll. This MS-2 black, mini half stack has bags of serious tone and is anything but a toy. It has even been used in professional recording studios; placed in a shoe box with a hole cut for a microphone. We kid you not.