PB-500D 1-Ohm Mono Class D Bass Amp | Safe and Sound

The PB-500D is a compact mono block Class D amplifier built to drive a subwoofer with deep, clean bass at a 1-ohm load. Being 1-ohm stable, it suits low-impedance setups such as dual voice coil subwoofers or multiple subs wired down to 1 ohm. At Safe and Sound we have spent over 30 years setting up subwoofer systems, and this little amp is a great-value way to add serious low end.

Full power into 1 ohm

The PB-500D is the 1-ohm stable member of PowerBass’s PB Series mono amplifiers, delivering its full 500W RMS at a 1 ohm load. That makes it the natural choice when your subwoofer wiring drops to 1 ohm and you want every watt the amp can give. The high-efficiency Class D design keeps current draw sensible while a 1000W peak rating provides plenty of headroom for dynamic bass.

If your setup runs at 2 ohm rather than 1 ohm, its sibling the PB-500.2D is designed to deliver full power at that load instead, so it is worth matching the amp to how your subwoofers are wired.

Tune your bass with precision

A variable low-pass crossover (30 Hz to 250 Hz), a variable subsonic filter (15 Hz to 50 Hz) and a switchable 12dB bass boost at 45 Hz let you tailor the output to your subwoofer and your taste, while a remote level control port accepts the optional PB-GAIN1 controller so you can adjust bass level on the move.

• Mono block, 1 ohm stable, high-efficiency Class D
• Variable low-pass crossover (30 Hz to 250 Hz)
• Variable subsonic filter (15 Hz to 50 Hz)
• Switchable 12 dB bass boost at 45 Hz
• Remote level port for optional PB-GAIN1 bass controller

Easy integration and solid protection

The PB-500D accepts both speaker-level (high) and RCA (low) inputs, so it can tap straight into a factory head unit without a separate line-output converter. A remote soft-delay turn-on circuit keeps switch-on clean, while full protection circuitry guards against impedance overload, speaker short circuit, thermal overheating and DC output.

Key specifications

Professional fitting from Safe and Sound

A mono bass amplifier like the PB-500D performs at its best with the right power and ground wiring, a properly rated fuse near the battery and a subwoofer wired to the correct impedance. With more than three decades of car audio and vehicle security experience, Safe and Sound can supply the PB-500D on its own or fit it for you alongside the right subwoofer, so your bass sounds tight, deep and controlled from day one.