preamp
J+4 Stereo Line Driver
Radial Engineering
Radial J+4 — a passive +4 dBu balanced stereo line driver. Used to safely connect unbalanced -10 dBV gear (like synths, drum machines, pedals) to balanced +4 dBu inputs without losing level. Transformer-isolated to eliminate ground loops. Not glamorous — just the connective tissue that keeps your studio quiet.
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