Quick view Infinity Infinity INV-BC4 Pre-Amp Bluetooth Controller INV-BC4 Pre-Amp Bluetooth ControllerThis stand-alone audio solution solely focuses on the most popular mode of audio, Bluetooth.The new affordably-priced Infinity by Harman INF-BC4 Pre-Amp Bluetooth Controller from Prospec Electronics enables anyone with... Now: $87.38 MSRP: Was: Add to Cart