Check the listing for details. Tech 21 SansAmp RBI - 1U Rackmount Pre-Amp for Bass. Condition: New. Listed at 359.00 USD. Tech 21 RBI Preamp Bass Rack Effects Unit Description For 2022, the SansAmp RBI rackmount has undergone a cosmetic update. All of the features and functionality remain the same. Like many of our products, the SansAmp RBI hasn’t changed since its introduction, which was in January 2001. That is, until now. The new faceplate revisits the original 1989 logo from the SansAmp Classic and incorporates more modern hardware for powering up. In short, the SansAmp RBI is a pumped-up, expanded version of our popular SansAmp Bass Driver DI pedal. It features an Effect Loop with a Mix 50/50 switch (for parallel or series operation), an XLR output with selectable levels, and a buffered direct XLR output to provide a dry signal. Having access to the most coveted classic and modern bass tones, with unlimited freedom to create your own, the SansAmp RBI is practically mandatory for any bass player. Features Drive adjusts the overall amount of gain and overdrive.Presence brings out the upper harmonic content and attack.Blend allows you to mix the direct instrument signal with SansAmp Tube Amplifier Emulation circuitry.Active Bass and Treble controls cut or boost ±12dB.Dedicated Mid control, cut or boost ±12dB.Individual Level control for the XLR out to optimize your amps output relative to the P.A. system.Mix 50/50 switch to configure the Effects Loop in series or parallel.Effects Loop.1/4" rear input and XLR output with selectable levels.Buffered uneffected XLR output to run a dry signal to a separate channel. Attributes Color (X): BlackEffect Type (X): PreampsOutput (X): MonoInput (X): MonoAnalog/Digital (X): AnalogTechnical Specifications Effects: Preamp