JBL SG-520 E

This is the classic 60s-era JBL SG520 pre-amp also known at the Graphic Controller. One of the first solid state pre-amps, the sound it produces is

JBL SG520 1960s Gold anodized

JBL SG520 (S/N:1357) Stereo Graphic Controller Preamplifier(Worldwide shipping)

JBL SG 520 Stereo Preamplifier/Graphic Controller for SA 600 Amplifier - Works Photo #4526268 - US Audio Mart

VERY RARE Vintage JBL SG520 Graphic Controller W/ Manual and schematics.

JBL : SG-520 - 中古 オーディオユニオン

JBL SG520 SM Service Manual download, schematics, eeprom, repair info for electronics experts

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

Very rare JBL SG520 - High End Audio For The Passionates

JBL SG 520 - Le forum Audiovintage

JBL SG520 Graphic Controller Preamplifier – Soundtrack Hi-Fi

JBL : SG-520 - 中古 オーディオユニオン

JBL SG520 Graphic Controller Preamplifier – Soundtrack Hi-Fi