Pleasant sound, with good soft bass, good "middle", a certain alloy of transistor detail and lamp heat. Plus power is connected to the "ground". Design - phono corrector on a GE transistor;. You must have soldering skills and understand electronics!
stereonomono - audio Hi Fi Compendium - 14 years on-line: JBL SG 520
Magic Moment: JBL Graphic Controller Preamplifier & Solid State Energizer Modification
What made the SG520 a must-have?. Imagine crystal-clear highs and thumping lows, turning every session into a nostalgic dance-off. No P.O. Boxes.
JBL SG520 Graphic Controller Preamplifier
JBL SG520 PRE Amp $2,400.00 - PicClick
Magic Moment: JBL Graphic Controller Preamplifier & Solid State Energizer Modification
JBL Guitar Amplifiers for sale in Ireland
AES E-Library » Complete Journal: Volume 34 Issue 1/2
Doctorjohn Cheaptubeaudio: Audio Reviews and More: April 2023
germanium Preamp?, Page 11
MM Phono preamplifier fully GE transistor. The phono circuit was developed by Beslik A.I. (Беслик А.И.). ,who is a well-known author of many circuits
Assembled phono stage board PCB DIY phono preamp MM / GE transistor Preamplifier
Re - 1984-04, PDF, Microprocessor
JBL Guitar Amplifiers for sale in Ireland
germanium Preamp?, Page 11
There is an opinion that the sound of an amplifier built entirely on germanium transistors has a special color close to the “warm tube” sound. On
Assembled PCB Germanium Ge transistor headphone amplifier
