Using the 6SL7/6SN7 tubes as the amplification, and 6L6G tubes as the output buffer section, this unit is also built with a 5U4G tube rectifier and enhanced power supply, (which gives you the best price-performance in a fully balanced pre-amplifier). All hand-wired to the highest possible standard. With the flexible capability of over 600 different tube combinations, you can easily fine-tune the tonal quality of this pre-amp to adapt it to the rest of your system.
This pre-amplifier has a special Normal/fast feature switch, it can give you a very high adaptability to different types of music. The Fast position is good for Rock, Pop and Jazz, while the Normal position is good for Blues, Vocal and Classical music. Even though this switch can change the pace of the music reproduction, the alternation can't be detected by any existing measuring instrument. The specifications will not be altered, the changes are only detectable by the human ear.
Top photos are the new CRYSTAL version (silver solid aluminum + clear plexiglass design with oil capacitors upgrade, $2,680 only !! )
The 3nd lowest set of photos shows a standard version with an additional silver aluminum face plate.
Lowest photo set shows solid-oak chassis with color aluminum top panel
Now available are super rectifier tubes up-grade STR-104 , STR-1001 and STR-1002, which can greatly enhance the dynamics, high and low frequency extension, and bass punch. A stand-by switch for pre-heating of the rectifier tubes ensures the longest operation for the lifetime of the tube. Rectifier tubes are replacable with high quality ceramic sockets installed.
STR-104 super rectifier $880
With this super rectifier adaptor, you can use 300B, 2A3 , 45 , 50 , 80, 83, 1616 , 3B28 or 866A as rectifier tubes option.