Mikhail...
All singlepower extremes burned up their transformers. Once you put a real transformer on it, sounds great.
ES1 and ES2, output tubes deliberately biased at -160 volts causing maximum VPSS voltage swing to be
800v. Very grim.
all high voltage versions of the dynamic amps. major stupidity.
singlepower squarewave. no heatsinks, burns up. But the fixed version is kickass for cheap.
Rudistor
silver plated copper wire reinforcement of hand etched circuit boards. major clusterfuck
boxes of boxes of boxes. one of which is a resistor (current source) in a box with a fan
headroom
all the early stuff was built well and sounded like crap. very poor performance.
(sorry tyll)
sennheiser
hev60 what a horrible design
and their new $2k thing is a poor sounding piece of crap
cavalli
liquid fire, take a standard circuit, replace front end with tubes, output stage with mosfets.
Then deliberately limit the available output current. Major clusterfuck
liquid gold
take a standard circuit and shrink both power supply voltages and number of output devices.
and claim that it is true balanced. but to make sure, add real piece of crap buf634 driving
drv134 to make unbalanced into balanced to drive it.