SKU: 22521624040

B2 Audio RAGE MI 850 - Mono Amplifier

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Description

B2 Audio RAGE MI 850 - Mono AmplifierRAGE MI Imagine the RAGE amps, with their features, performance and versatility. Their footprint is small for their performance, but can it be wrapped up in a slight different package? The RAGE MI, where the MI equals Mini does exactly that. Power, Performance, Perception & even smaller! It sounds too good to be true, but with a few redesigns weve made it possible. Offering the exact same power as the RAGE 1200s wouldnt make any sense, so we dialled

RAGE MI

Imagine the RAGE amps, with their features, performance and versatility. Their footprint is small for their performance, but can it be wrapped up in a slight different package? The RAGE MI, where the MI equals Mini does exactly that. Power, Performance, Perception & even smaller! It sounds too good to be true, but with a few redesigns we’ve made it possible.

Offering the exact same power as the RAGE 1200’s wouldn’t make any sense, so we dialled it back a bit. Not much though, the RAGE MI 1000.4 still offers an impressive true 4 x 175 W RMS @ 4 Ω. In dyno testing we were less than 6 % shy of that at 8 Ω! That goes to say these amps are beyond expectation.
The other RAGE MI offering is a 850 W mono and stable at 1 Ω. The same efficiency is clear here, 2 Ω dyno performance boasts more than 600 W. The near identical footprint of these 2 amps makes them perfect for sleek installs.
Any Level

The MI mono took notice of its RAGE 1200 siblings high level feature. The high & low level inputs offers greater flexibility, especially in vehicles where no RCA outputs are present. Given the modest dimensions, the amp can be hid away nearly everywhere (9.5 x 4.9 x 2.2″ / 24 x 12.5 x 5.7 cm). There’s no excuses for having insufficient bass response anymore. Even with a small amount of space for an enclosure, our shallow mount woofer RIOT FL10 solves that.
The RAGE MI 850 has a fully featured 12 dB / octave crossover section with 10 Hz ~50 Hz adjustable subsonic, 35 Hz ~250 Hz lowpass & a fixed 0 ~12 dB boost level @ 45 Hz. We even managed to squeeze in an external bass level remote port.
Packing the panel

The 4 channels of the RAGE 1000.4 MI takes up the entire panel. We didn't narrow it down with fixed crossover points & only 1 crossover type per stereo channel. The amp has fully configurable high & low pass crossovers on all channels. With the 50 Hz ~5 KHz adjustable frequency range the amp is ideal for anything , mid woofers, midranges, even bullet tweeters! Seeking more? The bridged configuration has more than 500 W available per channel, equalling over 1000 W RMS in total! With lowpass crossovers set accordingly, this tiny amp can used as a pure sub amp, or even as a tri-mode, with loudspeakers on the unbridged channels (front) and a woofer on the bridged channel (rear).

SPECIFICATION 14.4V
Power @ 4 Ω: 1 x 350 w
Power @ 2 Ω: 1 x 600 w
Power @ 1 Ω: 1 x 850 w

SPECIFICATION

Frequency Response: 10 Hz ~ 35 KHz (+/- 2 dB)
Signal to Noise Ratio: > 93 dB
Input Sensitivity: 6 ~ 0.2 V
Crossover: 12 dB / Oct
High Pass Crossover (Subsonic): 10 Hz ~ 50 Hz
Low Pass Crossover: 35hz ~ 250Hz
Damping Factor: >200
Power Terminal Gauge: 4 GA x1
Fuse Rating: 100 A
Operational voltage: 9 V ~ 17.5 V
Dimensions: 9.45″ x 5.9″ x 2.2″
240 x 125 x 57 MM
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SKU: 22521624040

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Ashley Mandrell
San Leandro, US
★★★★★ 5
Good buy
Format: Hardcover
This is a super cute book! It teaches about spring and we enjoy reading it!
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Reviewed in the United States on February 19, 2026
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Don Morris
Belleville, US
★★★★★ 5
"Racial Capitalism"
Format: Paperback
Cedric J. Robinson’s Black Marxism is first a history of Black people appearing in historical texts as far back as Herodotus (c. 484 – c. 425 BCE) in ancient Greece, and second a history of “the collisions of the Black and white ‘races’ beginning in the fifteenth and sixteenth centuries.” Robinson’s thesis connects the evolution of capitalism to its roots in racism (racialism) understood in broad terms to comprise the subjugation of one class/group/nation/race by another (the Irish by the English in the nineteenth century, for example). He uses the term “racial capitalism” to express this process—the necessity of opposing classes for the function of capitalism. As a result, “racialism,” he says, “would inevitably permeate the social structures emergent from capitalism.” Keynes attributed the slow change in the “standard of life of the average man” until the beginning of the eighteenth century to “the remarkable absence of important technical improvements and to the failure of capital to accumulate.” Capital is accumulated, in Marx’s view, through the accretion of “surplus labor” which is the extra time a worker “must add to the working time necessary for his own maintenance . . . in order to produce the means of subsistence for the owners of the means of production.” Robinson ties capitalism’s early exploitation of surplus labor to slave labor and the slave trade noting, “historically, slavery was a critical foundation for capitalism.” Robinson traces the forced transport of Black people from Africa (the diaspora) to Europe, as well as Central, South, and North America as a foundation of early capitalism (and slavery as its form of “primitive accumulation” of capital). In his discussions of slavery, Robinson stresses the sense of the enslaved people with respect to their captors in terms of the slaves’ resistance, hostility, and defiance of the masters—their “Black radicalism.” As Robinson’s text approaches the twentieth century and the influence of Marx, his focus narrows to the significance and character of specific Black leaders including W. E. B. Du Bois, C. L. R. James, and Richard Wright and their respective connections to Marxism’s diverse interpretations. Marxism, says Robinson, “has proven insufficiently radical to expose and root out the racialist order that contaminates its analytic and philosophic applications or to come to effective terms with the implications of its own class origins.”
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Reviewed in the United States on September 2, 2022
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Emma
Omaha, US
★★★★★ 5
Any socialist movement must centrally address racial liberation to succeed.
Format: Kindle
Robinson's masterwork powerfully demonstrates how the Black radical tradition emerged from the shared experiences of resistance to racial capitalism and colonialism. By tracing this intellectual and political lineage through figures like W.E.B. Du Bois, C.L.R. James, and Richard Wright, Robinson shows that Black liberation struggles were not simply an offshoot of European socialism, but represented their own distinctive radical tradition. A key insight is how Black resistance movements developed theoretical frameworks and modes of struggle that went beyond traditional Marxist analysis. Where European Marxism focused primarily on class conflict within industrial capitalism, Black radical thinkers recognized that racial oppression was fundamental to how capitalism developed globally through colonialism and slavery. This more comprehensive analysis helped explain why racial liberation had to be central to any meaningful socialist transformation in the United States. The book compellingly argues that Black liberation movements - from slave rebellions to civil rights to Black Power - represented some of the most significant challenges to American capitalism. These struggles exposed how racial oppression was not incidental but essential to American economic and social relations. By fighting for racial justice, these movements struck at the foundations of the capitalist order itself. Robinson's updated edition strengthens these arguments by extending the analysis into more recent decades. He examines how Black radical politics evolved in response to neoliberalism and continued racial inequalities, while maintaining connections to earlier traditions of resistance. For readers interested in both racial justice and socialist politics, this book remains invaluable for understanding how these struggles are fundamentally interconnected. It demonstrates why any socialist movement in the United States must centrally address racial liberation to succeed in transforming society.
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Reviewed in the United States on November 11, 2024
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Tee
Belleville, US
★★★★★ 5
A Classic That Requires Time
Format: Paperback
This book is for a particular type of reader. Robinson’s writing is beautiful, but not easy. The ideas are complex. It takes effort to get through. But, if you are interested in Black politics, and looking for fresh thinking, I recommend it highly. The funny thing is, the title is misleading. It is more about Europe and the formation of capitalism, and what Robinson defines as The Black Radical Tradition. Marx is critiqued but not rejected, and held uneasily at arm’s length. As Angela Davis wrote, this book needs to be read more than once. It’s like an album or a movie that is so unique and rich that you know you probably missed something on the first go-round. I expect to return to it many years to come.
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Reviewed in the United States on November 15, 2023
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Laura Peters
Boise, US
★★★★★ 5
Great condition
Format: Paperback
It came one day too late for Christmas, but that wasn't promised. Otherwise, it was received in great condition.
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Reviewed in the United States on January 1, 2022

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