M1s – In need of M1 power, but don’t have the space?

M1s is the street version of the M1, optimized for even lower voltage applications.
The HI-EF circuit improves performance as impedance rises. This rise is also seens as an everlasting battle as you will not see the power you expect when wiring to the amplifier.
The reason is that a subwoofer is not a resitive load, but it alters as it moves. In order to get the most power from our amplifier we chose to make it more powerful at higher ohms.

So in comparison to much larger amps, the M1s will be on par with them in a music setup for daily drivers. Simply put, the  M1s appears more powerful as it doesn’t need low impedance loads to show its full potential.

Compact for its power output, this is still a large amplifier & utilizes a split board pcb for better vibration stability to avoid failure. With a span from 3.5kw @ 10v to 8kw at 15v the B2 audio M1s is as strong as it gets.


Frequency Response:15 Hz ~ 250 Hz
Signal to Noise Ratio: 100 dB
Input Sensitivity:6 ~ 0.2 V
Crossover: 24 dB / Oct
Low Pass Crossover: 35 Hz ~ 250 Hz
Subsonic Crossover:10 Hz ~ 50 Hz
Bass Boost: 0 ~ 9 dB
Bass Boost Frequency: 30 Hz ~ 80 Hz
0 ~ 180°
Damping Factor:>300
Power Terminal gauge:
0 GA x 3
Fuse Rating:650 A
Operational voltage:9 V ~ 15 V
Dimensions:29.1" x 11.8" x 2.6"
74 x 30 x 6.4 cm
Power @ 4 Ω 12v:
Power @ 4 Ω 14.4v:
1800 w
2400 w
Power @ 2 Ω 12v:
Power @ 2 Ω 14.4v:
3200 w
4200 w
Power @ 1 Ω 12v:
Power @ 1 Ω 14.4v:
Power @ 1 Ω 15v:
5500 w
7100 w
8000 w
*In order to get the full power output of the amplifier, it is crucial that your electical system is correctly (over) dimensioned. Failure to upgrading will constrain the power output & lower the efficiency which can cause damage to the amplifier & void the warranty, this also includes ohm loads below of what is written in the manual. Do take your time and read the manual thoroughly before installing!