Amazon.com: Soundavo PSB-300 Class D Subwoofer Amplifier with Crossover/Phase Control 300W Max / 150W RMS : Electronics
Amazon.com: BOSS Audio Systems MC900B Amplifier for ATV UTV Car Marine - 500 High Output, 4 Channel, 2/4 Ohm, Bluetooth Multi-Function Remote, RCA Out, Weatherproof, Use Amp with Stereo and Subwoofer, Crossover : Electronics
BOSS Audio Systems BX55 Pre-Amp Electronic Car Crossover – 2-3 Way, Fine Tune Your High-Mid-Low Range Speaker Frequencies, Remote Subwoofer Control Included, Equalizer, DPS Audio Processor
KICKER CX 400W Class D Digital Mono Amplifier with Variable Low-Pass Crossover Black 46CXA4001 - Best Buy
BOSS Audio Systems BX55 Pre-Amp Electronic Car Crossover – 2-3 Way, Fine Tune Your High-Mid-Low Range Speaker Frequencies, Remote Subwoofer Control Included, Equalizer, DPS Audio Processor