Bill Putnam Sr, founder of Universal Audio, first introduced the 610 Modular Amplifier preamp in 1958. The 610 is famous among record producers for its harmonic detail, clipping characteristics, and ability to overdrive in a warm, musical fashion. You might not know the model number of the 610, but you would recognize its signature sound:… Read More Universal Audio Revives 601 Tube Preamp As UAD Plug-In