Jensen XDA91RB Mono Amplifier vs MTX THUNDER1000.1

The MTX THUNDER1000.1 is the stronger subwoofer amp. It makes more power at every impedance, adds a subsonic filter and set-screw terminals that take 1/0 AWG wire, and its surface-mount board resists vibration. The Jensen XDA91RB is smaller and lighter, and its Bluetooth app gives phone control of gain, crossover, bass boost and a 5-band EQ, which few amps in this class offer. Owners of both report solid output for the money; the Jensen's lower signal-to-noise figure and 25A x 2 fusing point to a less robust power supply than the MTX.

• Choose the Jensen XDA91RB if you want phone-based tuning of gain, crossover, bass boost and EQ, and a compact amp that fits a tight space.
• Choose the MTX THUNDER1000.1 if you are driving a subwoofer hard at 1 ohm and want more headroom, a subsonic filter and heavy-gauge set-screw connections.