49ST4TW + RPB1

This bundle pairs the Kicker ST4TW 1.5-inch PA-style bullet tweeter for your car audio system with a Rockville RPB1 waterproof handheld Bluetooth speaker for everywhere else. In the car, the ST4TW's horn-loaded aluminum diaphragm adds clear, high-efficiency top end that cuts through high-output bass, with front or rear mount options and a trim bezel for flexible placement. Spring-loaded terminals accept 16 AWG wire for solder-free hookup, and a built-in 6dB in-line crossover protects the tweeter from damaging low frequencies. Rated at 100W peak and 108dB sensitivity into 4 ohms, it holds up in competition-level SPL systems.

Outside the car, the RPB1 covers portable listening. It's fully submergible and IPX67-rated, puts out 10W of peak power in a compact, handheld body, and connects over Bluetooth 4.0 or NFC with a 40-foot range. A 500mAh battery runs up to 10 hours per charge, and an aluminum clip lets it hang from a bag, belt loop, or shower fixture.

Together, the two pieces cover both sides of clear, high-output sound: a competition-grade tweeter for the vehicle and a rugged, waterproof speaker for the shower, gym, or trail.