Pioneer GM-DX871 Mono Amplifier vs MTX THUNDER1000.1

Both are mono Class D subwoofer amps, but they are built for different systems. The MTX THUNDER1000.1 makes more power as impedance drops, reaching 1000W RMS at 1 ohm, and adds a subsonic filter and selectable bass boost that suit ported boxes and heavy bass builds. The Pioneer GM-DX871 is a simpler, compact 800W amp with gold-plated connectors and a clean aluminum top plate, and it holds 300W at 4 ohms. Pick the MTX for a low-impedance sub setup and the Pioneer for a straightforward 4-ohm install with tidy wiring.

• Choose the Pioneer GM-DX871 if you run a single sub at 4 ohms, want a compact amp with gold-plated terminals, and do not need bass boost or a subsonic filter.
• Choose the MTX THUNDER1000.1 if your subwoofer can be wired to 1 or 2 ohms and you want more output plus a subsonic filter for a vented enclosure.