As the smallest amplifiers in their class in the world, the Reference Fit amplifiers overcome thermal radiation issues inherent to compact amplifiers, while packing powerful Kenwood technology into a small compact design. This enables installation in tight applications that were previously restricted to lower performance amps - ideal for consumers who do not wish to sacrifice trunk space or prefer stealth installation!!

Model name: XR-1S, XR-4S, KAC-X1D, KAC-X4D

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XR-1S, XR-4S for Americas market　KAC-X1D, KAC-X4D for Europe/Asian market