【PXA300.1｜Compact, Waterproof Monoblock Power Amplifier】

I want to add a subwoofer, but there isn’t enough space inside the car to place a large amplifier. I also want to install the amp in locations that aren’t like typical in-car environments—such as off-road vehicles or hot rods. In situations like that, the easy-to-use option is the compact monoblock power amplifier PXA300.1.

With a waterproof design certified to IP66 and IP67, it comes in a body size that’s easy to fit even in limited space, while still delivering 300W at 1Ω, 250W at 2Ω, and 150W at 4Ω. It supplies solid power to the subwoofer, playing a role not only in adding the feel of deep bass, but also in establishing the foundation for the entire music performance.

In addition to a high-efficiency Class D design, it features a low-pass filter for adjusting the bass, and a subsonic filter fixed at 25Hz. Even if you want to bring out the bass strongly, you can tune it while considering how it connects with the front speakers and how easy it is to listen to inside the vehicle. Since it also supports a separately sold remote controller, it’s a good fit for those who want to prioritize usability after installation.

It includes inline couplers for power and ground, as well as stainless-steel mounting hardware, making it a model designed with easy handling during installation in mind. However, the final sound doesn’t depend on the amplifier’s performance alone—it varies depending on how you source the power, wiring treatment, the installation location, and the combination with the subwoofer. If it were me, I wouldn’t decide only the amplifier first; I’d confirm the available space in the vehicle, the intended use, and the subwoofer to pair with it before planning the system.

If you want to drive a subwoofer with a compact amplifier, or if you want to build an audio system for a vehicle that requires a waterproof design, consider the PXA300.1. You can organize, together, a practical installation approach and the overall direction of the sound to match your vehicle model and current audio setup.

Main Specifications / Specs

【Basic Information】

• Product name: PXA300.1
• Type: Monoblock power amplifier
• Intended use: For subwoofers
• Waterproof rating: IP66 / IP67 certified
• Amplification method: Class D

【Output】

• 1Ω monoblock: 300W ×1
• 2Ω monoblock: 250W ×1
• 4Ω monoblock: 150W ×1
• Dynamic power: 500W

【Audio Characteristics】

• Frequency response: 25 to 200Hz (+0 / −3dB)
• Low-pass filter: 60 / 80 / 100 / 120Hz
• Crossover: 12dB / octave
• Subsonic filter: Fixed at 25Hz, 24dB / octave
• Bass boost: Switchable 0dB / +6dB
• Bass boost center frequency: 40Hz

【Functions / Connections】

• Stable at 1Ω
• Turn-on mode: DC offset / 12V trigger
• CXARC Remote compatible: Sold separately
• Includes inline couplers for power and ground
• Includes stainless-steel mounting hardware

【Dimensions (Main Unit)】

• Width: 114.7mm
• Height: 47mm
• Length: 247.5mm