Brax – The Heavyweight Of Car Audio
Since its conception in 1990 Audiotec Fischer has evolved from a niche supplier to an internationally recognised leader in innovative audio products. A DIN ISO 9001 and ISO 14001 certified company, it now delivers its award-winning brands Brax, Helix and Match to more than fifty countries worldwide. To Audiotec Fischer the label "Made in Germany" has always been more than just a designation of origin; it's a promise of quality that everyone at the Schmallenberg site remains committed to. Audiotec Fischer has more than thirty years of experience in the development and manufacture of high-end car and home audio products. From the initial brief through to the finished product; all components are assembled in-house with the sole aim of reproducing acoustic signals as authentically as possible whilst optimizing the sound experience ever further.

Revelation Series – A New Era Dawns
Though digital sound processing is ubiquitously accepted as being critical for achieving superb sound, it's been analog amplification hitherto that's considered the benchmark for achieving the best sound quality. The Revelation series from Brax however is about to change that perception. For it marks the commencement of a whole new era; an era where digital amplification will outshine everything that has come before it.

In the words of Heinz Fischer; "As a passionate musician with over 45 years of success in the audio industry, I never thought class D technology could ever compete with analog. But let me be clear; the Revelation series equipment takes my breath away. The level of audiophile performance this range delivers is out of this world, elevating Brax's commitment to uncompromising sound to a new level. I am convinced that this technological masterpiece will open the eyes of even the most dedicated analog enthusiasts to a new era of high-end performance."

Design Ideologies
Is it really possible to make an actual world-class flagship standard amplifier using ultra-modern class D switching technology, rather than the well-proven class A and class AB topologies? Like others, we initially wouldn’t have though so either. However it only takes a single audition of these masterpieces to guarantee there will be no further discussion entered into as to whether it can be achieved. They’re quite simply sublime. So let’s delve deeper into what makes the design so special.

The New Benchmark In Sound Quality
The Brax Revelation series design combines compactness and efficiency in a most impressive way, conducive to technical and sonic attributes that elevate amplifier quality standards to a whole new level. In close collaboration with the Danish manufacturer Purifi, a unique and uncompromising concept was implemented based on their patented Eigentakt technology. This concept in action all but dispels any pre-existing prejudices against digital amplification.

Ancillary Specifications Beyond Belief
All performance metrics, including total harmonic distortion, inter-modulation and signal-to-noise ratio are so extraordinary that only the most expensive measurement systems can accurately measure them. The foundation of this exceptional performance is the multi-stage feedback principle, in which several extremely wide broadband and therefore ultra-fast feedback loops in the amplifier stages compensate for all non-linearities. This also extends to the output relays, which have their own control loop to equalize their minimal contact resistance. Crucially, the LC output filter required for class D amplifiers is incorporated into these feedback loops, completely compensating for its significant impact on distortion and output impedance. The results in the unit thus performing with phenomenal values including a damping factor of 10000, not just at the typical test frequency of 1 kHz but across the entire audio band. Additionally, the frequency response dependency on the load typical of class D amplifiers is eliminated with this circuit topology. No matter what configuration of speakers of subwoofers are driven, the output amplitude response remains perfectly linear up to 60 kHz across all impedances.

Advanced Power Supply Design
Another key to the unmatched sound quality of the Revelation series is the extensive effort put into the power supply design. The power supply is regulated, providing a constant output voltage to the power stages that is independent of the battery voltage. This ensures full start-stop capability and allows operation in electric vehicle onboard networks, where voltages up to 18 volts can occur. Additionally, the power supply is equipped with a total of 67 electrolytic capacitors with massive total capacity. This stand ready to deliver enormous impulse currents when needed. To ensure that the PCB does not hinder current flow, eight layers of copper minimize internal resistance. But that’s not all; the high number of layers also brings other advantages, ensuring that high currents have no impact on sensitive input or feedback signals thanks to the sophisticated layout.

Flexible Input Options with First-Class Signal Processing
The analog input module introduces the new super-balanced principle. In this two extremely low-noise and low-distortion BurrBrown OPA1612 operational amplifiers form a differential input stage per channel. This not only handles amplification but also ensures an extremely high common-mode rejection ratio, providing excellent immunity to automotive-related interference on the input signals.

The digital input module is equipped with both optical and coaxial SPDIF digital inputs. These work in conjunction with a state-of-the-art digital-to-analog Converter from ESS. This DAC achieves performance metrics previously unattained in the car audio realm, with a signal-to-noise ratio of 130 dB and a distortion figure of -117 dB (equivalent to 0.00014%). These outstanding values are made possible by the meticulous design of the power supply for the DAC. A dual voltage regulator, developed specifically by ESS; supplies each channel separately with extremely low-noise and highly stable operating voltage. As part of a logical, holistic concept designed to conform with Brax’s lofty quality standards; the digital input module also supports the proprietary DiSAC 2.0 protocol of the Brax DSP. This allows for unparalleled volume control at the end of the signal chain.

Compact Design And Revolutionary Efficiency
In addition to its unbeatable technical highlights, the RX2 PRO presents itself in an exceptionally elegant and compact form. Despite its enormous output power of 2 x 300 watts at 4 ohms or 2 x 510 watts at 2 ohms (or 1 x 930 watts at 4 ohms), it has the same size as a BRAX DSP and is nearly 40% more compact than a GX2000, or even 66% smaller than an MX4 PRO. In terms of efficiency, power consumption and reduced heat generation, the RX2 PRO opens a completely new chapter for BRAX, aligning with the general trend towards higher packing density and increased efficiency.

An Award Winning Digital Revolution In Amplifier Design
It’s not just marketing hype. See no matter how you perceive the Revelation series products, they’re nothing short of a true revolution. After over three years of intensive research and development they represent an unparalleled benchmark in amplifier design. This fact that was immediately recognized at its market launch, with it easily nabbing the coveted EISA Award for the best In-Car Amplifier 2024-2025″. At the ceremony Heinz Fischer commented thus; “What was previously unthinkable is now reality. With the Brax Revelation products, Audiotec Fischer is introducing the first digital power amplifier under the Brax brand name. Designed using class D technology to match or even surpass Brax’s existing analogue high-end amplifiers, we’re not reaching standards previously though attainable.

Immense Power
The Revelation series products can output enormous amounts of power, all without hint nor trace of distortion or noise. If you are looking for a modern, compact power amplifier with real high-end quality; you will find what you are looking for with Brax’s new Revelation range.

Design Features
– Proprietary bridgeable high-end class D amplifier concept based on Purifi’s patented Eigentakt technology.
– Redefining automotive sound quality and outperforming even the best class A and class AB amplifiers.
– Unique Multistage Feedback Design. Multiple feedback loops individually compensate for all non-linearities in the power section, including the LC filters and even the output relays, for absolute precision.
– Outstanding measurement values that all but outperform everything on the market thanks to negligible THD+N, minimal intermodulation distortion (IMD), impedance-unaffected linear frequency response up to 60 kHz and an impressive signal-to-noise ratio.
– Modular input concept with selectable modules. This gives you the choice between analog or digital inputs.
– Analog stereo input module features innovative super-balanced input structure for particularly high interference immunity thanks to maximum Common-Mode Rejection (CMR), equipped with the currently best sounding and ultra-low-noise OPA1612 operational amplifiers from BurrBrown.
– Digital stereo input module is equipped with the latest state-of-the-art ES9039Q2M DAC from ESS, powered by a voltage regulator specially developed by ESS. This provides each DAC channel with an extremely low-noise and stable power supply. Equipped with an optical and a coaxial SPDIF input that supports our proprietary DiSAC 2.0 protocol for lossless and highly advanced volume control, manageable via the Brax DSP.
– Incomparably sophisticated power supply. Fully regulated, start-stop-capable power supply unit for the output stages with enormous total capacity for maximum peak current capability. Separate voltage regulators for each input and driver stage guarantee maximum stability and prevent any influence on the signal quality; suitable up to 18 V on-board voltage for electric vehicles.
– Exceptional frequency-independent damping factor of over 10000 @ 4 Ohms. Unlike conventional class D designs this ensures maximum speaker control at all frequencies, resulting in unrivaled audio precision.
– Particularly compact and maximum efficiency.
– Same footprint dimensions as the Brax DSP.
– Ideal for modern vehicle concepts thanks to low heat generation and high efficiency.
– Ultra-low impedance eight layer printed circuit board. This allows maximum loss-free current flow and optimum isolation of sensitive input signals from the power stages.
– Exclusive use of the finest components in the world. This guarantees maximum consistency and remarkable durability.
– Complex protection circuits. This provides optimum protection of the amplifier and the connected speakers under all conceivable load and temperature conditions.
– Processor and temperature-regulated fan. This ensures optimum cooling and an ideal operating temperature range for the amplifier.
– Separate connector for the Brax power stabiliser. Thus allowing for an increased power supply and improved maximum performance of the amplifier.
– Massive heat sink made of a special aluminum alloy, which enables optimum heat dissipation and continuously high performance.
– Engraved serial number in the stainless steel type plate. This emphasises the exclusivity of the amplifier.

Electrical Specifications
– Nominal configuration: two channel class D amplifier
– Continuous power @ 4 Ohms: 2 x 300 Watts
– Continuous power @ 2 Ohms: 2 x 510 Watts
– Continuous bridged power @ 4 Ohms: 1 x 930 Watts
– Frequency response: 10 Hz – 60 kHz
– Total harmonic distortion: 0.0002 %
– Damping factor: 10000
– Signal-to-noise ratio: 125 dB

Physical Specifications
– Length: 310 mm
– Width: 200 mm
– Height: 56 mm
– Weight: 9.8 kg

Documentation
– Car & Hifi International review
– User manual

Important Disclaimers
Given the dynamic nature of electronics industries these days; below are listed some very important specifics you need to be aware of.

Brand Authorization And Stock Sourcing
We are a fully authorised Australian dealer of this brand and all stock is sourced through legitimate channels. It therefore enjoys full Australian warranty, backing and support.

Pricing Structure
Whilst we endeavor to offer the best price possible, we ask that if you do find a better price elsewhere from an authorised dealer; please contact us. Also be aware that we regularly conduct group buys and sales, therefore pricing can sometimes be subject to change without notice.

Stock Structure
Being a dynamic store is conducive to our inventory constantly changing. We list only a small portion of our stable online, usually products most popular. Aside from these we also stock numerous other variants and configurations of these products, hence if you don’t see what you’re after please contact us.

Shipping
All our products are shipped with registered and insured postage. Upon ordering you’ll be issued with a receipt, a consignment note via which you can track your order, and we’ll also SMS you photos of the package for identification purposes.

Technical support
This last one we cannot emphasise enough! Please contact us if you require any further information or assistance with the setup and use of this product, especially pertaining to aspects more technical. As we want you to get the very best from this product.