Phonic keyboard amplifiers are built with both durability and quality in mind. The MK15 and MK50 amps are built around our unique solidtube technology. The solidtube design manages electrical currents to closely mimic the behavior and warmth of traditional tubes. Solidtube enables our amplifiers to capture the practicality, cost effectiveness and reliability of solid state technology while replicating the tonal dynamics of coveted tube amplifiers. Designed to endure random abuse by enthusiastic musicians, all of our keyboard amps are covered with tough carpeting and provide sturdy enclosures.