Product · United States

RB400 Three-band EQ Preamp Module, Bass Guitar DIY Upgrade Board, Built-in 3-stage Tone Adjustment Circuit

Product no longer available. The stores we track no longer sell it; last price seen $45.66.

Price history: 4 daily prices tracked since 2026-10-18; lowest $45.51, highest $45.66.

RB400 Three-band EQ Preamp Module, Bass Guitar DIY Upgrade Board, Built-in 3-stage Tone Adjustment Circuit

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