VTB1 Variable Tube Microphone Preamp by Studio Projects
The new Studio Projects VTB-1 is the ultimate in low cost mic preamplifier technology. Incorporating true class A/B switching, the VTB-1 is a totally discrete circuit.
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As low as $149.99
User Review: I opened it to check. Same basic circuit as Mackie/Behringer use. Preamp sounds better when line driver "chip" is providing your gain than when the two transistors in the front are.