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In a video detailing what's going up for sale, Mark focusses in particular on an Orange amp head used on +44's debut (and at this time, only) album, When Your Heart Stops Beating – "Basically the main lead guitar tone across the entire +44 album is this amp and cabinet set up," he says.
There's also a Marshall amp and speaker cabinet used with blink, +44, New Found Glory and Motion City Soundtrack, a Bogner Uberschall amp head for a "dope heavy guitar sound", and much more – watch the video below, and see the full shop over at this link.