Check the listing for details. PRO-PLT-301 Platinum Stage Analog Universal Instrument Preamp. Condition: Open box. Listed at 172.89 USD. A discrete, high-headroom preamp combines with precision, high-speed circuitry for pure fidelity and low distortion. Classic Fishman tone controls are combined with a switchable guitar/bass EQ mode, making it more musical for use with bass instruments and more universal for recording and amplifying anything else. Critical performance features – including adjustable volume boost and balanced XLR D.I. outputs – are housed in a beautiful, road-ready design.With an included belt-clip, the Platinum Stage is perfect for mobile instrumentalists, such as mandolin and fiddle players and other instruments which are too small or too precious for anything but a passive pickup. It can also be powered via 48V phantom power, offering complete control over your sound without batteries. Platinum Stage.