From the Price Guide

Reviews for the Aguilar OBP-2TK Onboard Bass Preamp 2-Band Boost/Cut
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  • I feel that Aguilar onboard preamps (OBP1/OBP-2/OBP-3) are the best sounding onboard preamps in the business! I've tried all the others and always come back to the Aguilar preamps! I install one of these in any bass I intend to keep. :-)