Crescendo REVOLUTION 5A1 1 Channel Amplifier

The Crescendo Revolution 5A1 produces 450 watts per channel at 4 ohms, 2 ohms, and 1 ohm, all rated at 14.4 volts. The output is identical at every load, so the amplifier delivers its full 450 watts regardless of how the subwoofer or speaker is wired, down to its 1-ohm minimum load.

Yes. The Revolution 5A1 has a published minimum speaker load of 1 ohm and delivers its full 450 watts at that load, the same output it produces at 2 ohms and 4 ohms. This consistent power delivery across impedances is the amplifier's defining feature and removes wiring configuration from the system planning equation.

Both. The Revolution 5A1 has a frequency response of 4 Hz to 80 kHz at -3 dB, making it a true full-range Class AB monoblock. It excels on a reference subwoofer stage thanks to its damping factor above 500, and it works equally well powering a high-output midbass driver or a dedicated center channel in a high-end build.

The Revolution 5A1 measures 0.04% total harmonic distortion at 1 watt across 20 Hz to 20 kHz, a 122 dB signal-to-noise ratio at rated power (95.4 dBA by the CEA-2006 1-watt standard), and an effective damping factor above 500 from 20 Hz to 20 kHz. These are reference-level measurements that keep detail intact even at low listening volumes.

No. Like the rest of the Crescendo Revolution series, the 5A1 is a pure power amplifier with no onboard filter or bass boost. It is designed for systems where a DSP handles crossover points, time alignment, and EQ, so the amplifier's only job is amplifying the processed signal without coloration. Pairing it with a quality processor such as a Goldhorn DSP completes the signal chain.

The 5A1 is a monoblock delivering a constant 450 watts at 4, 2, or 1 ohm, typically used for a subwoofer or dedicated midbass channel. The 5A4 is a 4-channel Class AB High Bias amplifier delivering 75 watts x 4 at 4 ohms, 125 watts x 4 at 2 ohms, and 210 watts x 2 bridged, typically running the front stage. The two share the same chassis footprint and design philosophy, and together they amplify a complete DSP-based SQ system.

Yes. The Revolution 5A1 carries onboard fusing of 2 x 30 amps, plus thermal and short circuit protection. You should still install a properly rated fuse near the battery positive terminal to protect the power cable run, as with any amplifier installation.

The Revolution 5A1 measures 270 by 150 by 60 millimeters, which is 10.6 by 5.9 by 2.4 inches, and weighs 2.3 kilograms (5.1 pounds). The brushed grey aluminum chassis matches the Revolution 5A4, so the pair racks cleanly together in show-style installations.