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

The Brax Revelation RX2 PRO (analog input, black) is a high-end 2-channel Class D car amplifier based on PURIFI EIGENTAKT technology, delivering 2 x 300 W at 4 Ω. It accepts analog RCA line-level signals via a super-balanced input module and is part of Brax's Revelation range.

This listing is the analog input version. The RX2 PRO is also available with a digital input (optical/coaxial SPDIF, ESS DAC) in black, and in a silver analog input version.

Key specifications

• Input: analog stereo module, 2 x RCA, super-balanced design with BurrBrown OPA1612 op-amps
• Channels: 2, bridgeable
• Power: 2 x 300 W @ 4 Ω, 2 x 510 W @ 2 Ω, 1 x 930 W bridged @ 4 Ω
• Class D design based on PURIFI's patented EIGENTAKT technology with Multistage Feedback
• Damping factor over 10,000 @ 4 Ω across the whole audio band
• Linear frequency response up to 60 kHz regardless of speaker impedance
• Regulated, start-stop-capable power supply with 67 capacitors, suitable for EV systems up to 18 V
• 8-layer printed circuit board, temperature-regulated fan, aluminium alloy heat sink
• Connector for the BRAX Power Stabiliser
• Same footprint as a BRAX DSP

The beginning of a new era

Digital signal processing has long been part of the Brax world through the Brax DSP, but analog amplification has traditionally been considered the benchmark for sound quality. The Brax Revelation RX2 PRO changes that, introducing a Class D design that Brax says 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 analog. 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 analog enthusiasts to a new era of high-end amplification."

– Heinz Fischer

• Proprietary bridgeable high-end Class D amplifier concept based on PURIFI's patented EIGENTAKT technology
• Unique Multistage Feedback Design — multiple feedback loops compensate for all non-linearities in the power section, including the LC filters and output relays
• Outstanding measurement values — negligible THD+N, minimal intermodulation distortion (IMD), linear frequency response up to 60 kHz, and high signal-to-noise ratio
• Modular input concept — choose between analog or digital input modules
• Analog stereo input module with super-balanced input structure for high interference immunity via maximum Common-Mode Rejection (CMR), using BurrBrown OPA1612 op-amps
• Regulated, start-stop-capable power supply with 67 electrolytic capacitors; separate voltage regulators for each input and driver stage; compatible with EV onboard voltages up to 18 V
• Damping factor over 10,000 @ 4 Ω across the entire audio band — ensures maximum speaker control at all frequencies
• Same dimensions as a BRAX DSP — compact, efficient, and suited to modern vehicle installations
• Ultra-low impedance 8-layer printed circuit board — maximum current flow and optimum isolation of input signals from power stages
• Exclusive use of selected high-grade components for consistency and durability
• Complex protection circuits for the amplifier and connected speakers under all load and temperature conditions
• Processor and temperature-regulated fan for optimum cooling
• Separate connector for the BRAX Power Stabiliser
• Massive heat sink made from a special aluminium alloy
• Engraved serial number on a stainless steel type plate

The new benchmark in sound quality — with PURIFI's EIGENTAKT technology

Developed in close collaboration with Danish manufacturer PURIFI, the RX2 PRO is built around their patented EIGENTAKT technology. All performance metrics — including THD+N, intermodulation, and signal-to-noise ratio — are so exceptional that only the most expensive measurement systems can accurately capture them.

The Multi-Stage Feedback principle uses several ultra-fast feedback loops to compensate for all non-linearities in the amplifier stages. This extends to the output relays, which have their own control loop to equalise minimal contact resistance. Crucially, the LC output filter is incorporated into these feedback loops, fully compensating for its effect on distortion and output impedance.

The result is a damping factor of over 10,000 @ 4 Ω — not just at 1 kHz, but across the entire audio band. The frequency response remains perfectly linear up to 60 kHz regardless of speaker impedance, eliminating the load-dependent behaviour typical of conventional Class D designs. Paired with high-end Brax drivers, that level of speaker control translates directly into audible precision.

Advanced power supply design

The regulated power supply delivers a constant output voltage to the power stages independent of battery voltage, providing full start-stop capability and compatibility with EV onboard networks up to 18 V. It carries 67 electrolytic capacitors with massive total capacity for high peak current delivery. The 8-layer PCB minimises internal resistance and ensures high currents cannot affect sensitive input or feedback signals.

Flexible input options with first-class signal processing

The analog input module uses a super-balanced differential input stage per channel, with two BurrBrown OPA1612 op-amps providing extremely high common-mode rejection and excellent immunity to automotive interference.

The separately available digital input module features optical and coaxial SPDIF inputs with an ESS DAC achieving a signal-to-noise ratio of 130 dB and distortion of -117 dB (0.00014%). A dual voltage regulator developed by ESS supplies each channel separately. The digital module also supports the proprietary DiSAC 2.0 protocol of the Brax DSP for volume control at the end of the signal chain.

Compact design and revolutionary efficiency

Despite its output of 2 x 300 W @ 4 Ω, 2 x 510 W @ 2 Ω, or 1 x 930 W bridged @ 4 Ω, the RX2 PRO shares the same footprint as a Brax DSP — nearly 40% more compact than a GX2000 and 66% smaller than an MX4 PRO. Low heat generation and high efficiency make it well suited to high-density modern vehicle installations.