LA Audio keeps the development on track many years; finally invent the exclusive output transformer. The output transformer is the key factor of ambisonics, which could make the Tube Amplifier perform the original sounds perfectly. Thus, within the melodic sounds and dignified outlook, the tube amplifier. They have strong developing team, unstoppable creation. Make the ancient Tube become the art of melody. LA Audio products "Quality Built""Superb Sound""Great Look" that you proud to own and enjoy many years to come.