Ampire MBM.1.24V-4G - 1-channel amplifier digital

The new MBM1.24V-4G power amplifier for trucks, buses and boats with 24 volt on-board voltage was specially developed for this application. Enormous voltage fluctuations of 20 to 32 volts are no longer a problem for the newly developed power supply.

Features

• Mono digital amplifier for 24 volt operating voltage in trucks, buses or boats
• Ultra-compact design
• Cinch inputs
• Speaker inputs with auto-turn-on function
• 500 watts RMS/1000 watts max.
• Illuminated AMPIRE logo

Power supply

• Operating voltage: 20-32 volts DC
• Remote voltage: 8-28 Volt DC
• Quiescent current: 0.86A
• Quiescent current when switched off: <0.0004A
• Fuse: 25A x 2

Power amplifier

• Output power (RMS) @ 28.8V / 4 Ohm: 300 Watt x 1
• Output power (RMS) @ 28.8V / 2 Ohm: 500 Watt x 1
• Output power (max.) @ 28.8V / 4 Ohm: 600 Watt x 1
• Output power (max.) @ 28.8V / 2 Ohm: 1000 Watt x 1
• Total harmonic distortion: <0.5%
• Signal-to-noise ratio: >85dB
• Input sensitivity: 200mV - 6.0V

Active crossover

• Low pass filter: 30Hz-250Hz
• Slope: 12dB
• Bass boost gain: 0-12dB
• Bass boost frequency: 40-100Hz variable
• Subsonic filter: 20Hz/24dB

Other

• Dimensions (LxWxH): 251 x 141 x 50mm
• Weight: 1.90Kg
• Inputs: 2x RCA, 2x loudspeakers (high level auto turn on for radios with BTL amplifiers)

Cable cross-section of the connection terminals 

• Power supply up to 35mm²
• Loudspeakers up to 10mm²

ECE approval

E8 10R-04 1281

Test report

Categories: Car HiFi power amplifier mono
Product: Ampire MBM 500.1 (12 volt version of the MBM1.24V)

Power amplifiers that look small and harmless are often underestimated. The mono from Ampire's MBM series is the best example of this. It is packed with technology, the circuit board is filled with countless components, many of which suspiciously have more than three legs. The engineers have put a lot of brainpower into this circuit to generate the necessary efficiency in addition to the power, which makes such power development possible in the smallest of spaces. Of course, a Class D circuit is used, and Ampire has put a lot of thought into ensuring a clean signal. The output filtering is very carefully carried out, which leads to pretty good distortion measurements despite the digital technology. You don't have to worry about power with the 500.1; 276 or a good 450 watts will make even adult woofers tremble. The equipment also receives great praise; there is even an adjustable bass boost, and the extremely useful automatic switch-on for operation with the factory radio is also on board. In the listening test, the little Ampire reveals itself to be a powerful subwoofer tamer, and it also shines with enormous control. It keeps an overview even in more demanding bass passages. It can also impressively showcase hard kick drums and give them a very dry punch. A performance that is really impressive, so that the MBM 500.1 really deserves an award.

Elmar Michels
Test editorial team Car & Hifi
www.hifitest.de