The Mode Four Series debuted at the Winter NAMM show in 2003. This amp was designed with the same intention that Jim Marshall used when the first JTM-45 was built. Jim listened to what players wanted and he delivered. 40 years later, the Mode Four Series is built on those same principles. This new amp has a massive 350W of power, more gain, more low-end, more head room, and the best cleans and crunches that Marshalls are known for. There are two separate amps in each unit with either clean or crunch selections for a total of four modes (hence the name).