AIQIN is well-known brand in china, this E元4 series is already sold more 10 milles copies, itlsquos the most popular tube amps, it's used for 100w around HIFI Speakers to all music type and special for vocal chords music.The circuit above is complete… IWISTAO Tube Amplifier KT100 Power Stage 2x13W Triode Connection Class A Signal-ended with MM Phono Headphone Amp USB Decoder HIFI Audio, Sweet Peach Series is single-ended Class A.
E元4 is very famous tube and great for power tube amplifier.The Leben CS-600 is just a silly good amplifier, and is definately an old friend at this point! I thought it would be fun to try the new Sophia Electric E元4-ST vacuum tubes in my Leben CS-600 integrated amplifier, which has been with me longer than any other amplifier I own. Supposedly it has more gain and tighter bass responce. The flash did create reflections on the shiny parts of the amp and picked up any dust that was there. this unit is mint (I can not find any scratches, scuffs or blemishes).
Marshall E元4 Tube guitar amp bias adjustment mod D-lab Electronics.