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Recoil LC1 RCA Controller for Car Audio Amplifier Bass Boost Volume Knob USD 12.99 · New · Shipping USD 0.00 View on eBay →

DD Audio BSI Bass Boost and Bass Enhance Active Pre-Amp Signal Processor USD 169.00 · New · Shipping USD 0.00 View on eBay →

Universal Audio Ruby '63 Top Boost Amplifier UAFX Dual-Engine Effect Pedal w/Box USD 319.99 · Open box · Shipping USD 0.00 View on eBay →

NEW Sonos Boost Audio Network Adapter Ethernet Wireless Bridge USD 50.34 · New View on eBay →

Universal Audio Ruby 63 Top Boost Amplifier Pedal USD 215.00 · Used View on eBay →

J. Rockett Audio Designs Lenny Color Boost Pedal USD 79.99 · New · Shipping USD 0.00 View on eBay →

Non-Human Audio RAM (buffer/boost/eq). "Free Shipping in the USA" USD 150.00 · New · Shipping USD 0.00 View on eBay →

J. Rockett Audio Designs Blue Note Select Boost/Overdrive Pedal USD 183.20 · New · Shipping USD 0.00 View on eBay →

MXR CAE Custom Audio Electronics MC402 Boost/Overdrive Guitar Effects Pedal USD 85.00 · Used · Shipping USD 15.00 View on eBay →

J. Rockett Audio Designs Steampunk Boost / Buffer Steam Punk Guitar Effect Pedal USD 60.00 · Used · Shipping USD 9.00 View on eBay →

Gravity 8000 Watts Class D 1 Ohm Stable car audio Sub bass Competition Amplifier USD 299.99 · New · Shipping USD 0.00 View on eBay →

Creation Audio Designs Holy Fire 9 overdrive/boost pedal USD 100.00 · Used View on eBay →