Best cheap Class D amplifiers

Top pick: CT-700.1D monoblock — the cheapest way into a genuinely good Class D amp. It's a single-channel bass amp with a bass knob, and owners rate it highly, so it's the safe first buy for a subwoofer setup.

Who the others suit:

• CT-80.4D / CT-150.4D — four-channel amps for powering door speakers (and bridging to a sub later); the 150.4D is the step up if you want more headroom.
• CT-1000.1D / CT-1500.1D — same family, more bass power for a bigger sub.
• Rockville DS10 / D14 — two-channel stereo amps, good for a simple front-stage build.
• Pioneer GM-DX874 — the pick if you want a name brand and clean 4-channel power.
• Crown XLS1002 / Sound Town NIX-D4800 — pro-style rack amps for PA or installed sound, not car audio.

Check the impedance and RMS rating of your sub or speakers before buying — that matters more than wattage claims.