The heaviest and most expensive tube amplifier ever built!? At 1 million Euro price tag, it certainly seems like it. Designed and manufactured by Japanese master for the owner in the Kingdom of Saudi Arabia. Two push-pull tube amplifiers with 1500W per channel out (2000W possible with the increased B voltage), each one weighs a mind-blowing 2.4 tons There are four 212 tubes per channel. Thes amps come with a 100kg, two chassis dedicated Class A preamplifier. All the transformers were custom made by Tamura.