Brax Revelation RX2 PRO Amp High-End 2 Channel Digital Input Amplifier Black

The Brax Revelation RX2 PRO (Digital Input, Black) is a high-end 2-channel Class D car amplifier from Brax's Revelation range, built on PURIFI EIGENTAKT technology and fitted with an ESS digital input module accepting optical or coaxial SPDIF — delivering 2 x 300 W at 4 Ω, 2 x 510 W at 2 Ω, or 930 W bridged at 4 Ω.

This is the digital input version, ideal for use with a Brax DSP thanks to DiSAC 2.0 volume control. If your system uses RCA line-level signals, choose the RX2 PRO Analog Input (Black). Prefer a different finish? See the Silver version.

Key specifications

• Channels: 2, bridgeable
• Power output: 2 x 300 W @ 4 Ω, 2 x 510 W @ 2 Ω, 1 x 930 W bridged @ 4 Ω
• Topology: Class D, PURIFI EIGENTAKT with Multistage Feedback Design
• Input module: ESS ES9039Q2M DAC, optical and coaxial SPDIF, 130 dB S/N, -117 dB distortion (0.00014%)
• DiSAC 2.0 protocol support for volume control via Brax DSP
• Damping factor: over 10,000 @ 4 Ω across the full audio band
• Frequency response: linear to 60 kHz regardless of speaker impedance
• Power supply: regulated, start-stop-capable, 67 electrolytic capacitors, suitable for EV onboard voltages up to 18 V
• PCB: 8-layer construction
• Cooling: processor and temperature-regulated fan, aluminium alloy heat sink
• Connector for Brax Power Stabiliser
• Same footprint as a Brax DSP
• Finish: Black with engraved stainless steel serial number plate

The beginning of a new era

Digital signal processing has long been part of the Brax world via the legendary Brax DSP, but analogue amplification was always considered the benchmark. The Brax Revelation RX2 PRO changes that — a digital amplifier that outperforms everything before it in the car audio segment.

"As a passionate musician with over 45 years of success in the audio industry, I never thought Class D technology could ever compete with analogue. But let me be clear: the Brax Revelation RX2 PRO takes my breath away. The level of audiophile performance this amplifier delivers is out of this world and elevates 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 analogue enthusiasts to a new era of high-end amplification."

– Heinz Fischer

• Proprietary bridgeable Class D concept based on PURIFI's patented EIGENTAKT technology — redefining automotive sound quality and outperforming even the best Class A and Class AB amplifiers.
• Multistage Feedback Design — multiple feedback loops individually compensate for all non-linearities in the power section, including the LC filters and output relays, for absolute precision.
• Outstanding measurements — negligible THD+N, minimal intermodulation distortion (IMD), impedance-unaffected linear frequency response to 60 kHz, and 130 dB signal-to-noise ratio.
• Modular input concept — choose between analogue or digital input modules.
• Digital stereo input module — ESS ES9039Q2M DAC with a dedicated ESS-developed voltage regulator per channel for low-noise, stable power. Optical and coaxial SPDIF inputs with DiSAC 2.0 support for lossless volume control via the Brax DSP.
• Regulated, start-stop-capable power supply — 67 electrolytic capacitors for maximum peak current capability; separate voltage regulators for each input and driver stage; suitable up to 18 V for electric vehicles.
• Damping factor over 10,000 @ 4 Ω across the entire audio band — not just at 1 kHz — ensuring maximum speaker control and unrivalled audio precision.
• Compact footprint — same dimensions as a Brax DSP; nearly 40% more compact than a GX2000, and 66% smaller than an MX4 PRO.
• 8-layer PCB — maximum loss-free current flow and optimum isolation of sensitive input signals from power stages.
• Finest selected components throughout — for maximum consistency and durability.
• Complex protection circuits — optimum protection for the amplifier and connected speakers under all load and temperature conditions.
• Processor and temperature-regulated fan — maintains ideal operating temperature.
• Separate connector for the Brax Power Stabiliser — for increased power supply and improved peak performance.
• Massive aluminium alloy heat sink — optimum heat dissipation for continuously high performance.
• Engraved serial number on stainless steel type plate — emphasising the exclusivity of each unit.

The new benchmark in sound quality — PURIFI EIGENTAKT technology

Developed in close collaboration with Danish manufacturer PURIFI, the RX2 PRO is built on their patented EIGENTAKT technology and dispels all previous prejudices against digital amplification. THD+N, intermodulation and signal-to-noise ratio are so extraordinary that only the most expensive measurement systems can accurately capture them.

The Multi-Stage Feedback principle uses several extremely broadband, ultra-fast feedback loops to compensate for all non-linearities — including the output relays, which have their own control loop to equalise their minimal contact resistance. The LC output filter required for Class D is incorporated into these feedback loops, completely compensating for its impact on distortion and output impedance.

The result: a damping factor of over 10,000 @ 4 Ω across the entire audio band, and a frequency response that remains perfectly linear to 60 kHz at all impedances — regardless of which speakers are connected. Pair the RX2 PRO with high-end drivers such as the Brax Graphic GL6 MK2 mid-woofers to take full advantage of this precision.

Advanced power supply design

The RX2 PRO's power supply is regulated, delivering a constant voltage to the output stages independent of battery voltage — ensuring full start-stop capability and compatibility with EV onboard networks up to 18 V. Sixty-seven electrolytic capacitors provide enormous total capacity for massive impulse current delivery on demand.

An 8-layer PCB minimises internal resistance for loss-free current flow, while the sophisticated layout ensures high currents have no influence on sensitive input or feedback signals.

Flexible input options with first-class signal processing

The digital input module features both optical and coaxial SPDIF inputs and an ESS ES9039Q2M DAC — achieving a signal-to-noise ratio of 130 dB and a distortion figure of -117 dB (0.00014%). A dual voltage regulator developed specifically by ESS supplies each channel separately with extremely low-noise, stable operating