Margules ACRH-3 Integrated Amp

Description

The Margules ACRH-3 is a hybrid integrated amplifier designed for audiophiles seeking the tonal richness of vacuum tubes combined with the power and control of modern solid-state amplification. Built by the Mexican high-end audio manufacturer Margules Audio, the ACRH-3 forms part of the company’s Magenta series and is intended as a versatile centerpiece for high-performance stereo systems. With a tube-based preamplifier stage, a discrete transistor output stage, and an integrated phono section, the amplifier offers a complete solution for both analog and digital listening setups.

Overview

At its core, the ACRH-3 is a hybrid design that combines two amplification technologies: vacuum tubes in the preamplifier section and solid-state devices in the power stage. This architecture aims to deliver the harmonic richness and musical warmth associated with tube circuits while maintaining the current capability and reliability of transistors. The preamp stage employs two 12AU7 (ECC82) dual-triode tubes—one per channel—providing a low-noise, harmonically rich signal path before passing the signal to the Class AB+ transistor output stage.

Margules designed the amplifier with direct-coupled circuitry and discrete semiconductors operating in an AB+ configuration. This approach minimizes signal loss between stages and allows the amplifier to deliver strong current for driving complex or low-efficiency loudspeakers. The result is an amplifier that aims to combine warmth, clarity, and dynamic authority.

The ACRH-3 also incorporates the company’s proprietary ANA® (Neuro-Acoustic Alignment) technology. This design philosophy focuses on the way the human brain perceives sound—prioritizing harmonic structure rather than purely measured technical parameters—to produce a presentation that feels more natural and engaging to listeners.

Functionally, the amplifier is designed as an “integral system,” offering multiple line inputs, a high-quality discrete phono stage for moving-magnet and high-output moving-coil cartridges, and pre-out connections for expanding a system with additional amplifiers or subwoofers. This versatility allows it to serve as the central hub of a vinyl-focused hi-fi system or a mixed analog-digital setup.

Sound and Review Impressions

The ACRH-3 has appeared at several high-end audio shows and demonstrations, where reviewers noted its musical presentation and ability to drive demanding speakers. During one show report, the amplifier was described as performing “an admirable job showing off the capabilities” of high-end loudspeakers when used as the main integrated amplifier in a system.

Another show report highlighted the system featuring the ACRH-3 as producing “great resolution, transparency, and a wealth of musical overtones,” emphasizing the amplifier’s ability to deliver a natural and detailed listening experience.

The amplifier’s hybrid topology is frequently credited for its balance between warmth and control. Tube gain stages contribute smooth tonal textures and harmonic complexity, while the transistor output section provides sufficient power to handle demanding speaker loads without strain.

Key Features

• Hybrid integrated amplifier (tube preamp + solid-state power stage)

• Class AB+ discrete transistor output stage

• Two 12AU7 (ECC82) tubes in the preamplifier stage

• Built-in phono preamp for MM and high-output MC cartridges

• Multiple line-level inputs for digital and analog sources

• Pre-out connections for system expansion

• Margules ANA® (Neuro-Acoustic Alignment) technology

• Designed to drive low-sensitivity or complex speaker loads

Product Specifications

• Power Output: 100 W per channel (8Ω) / 160 W per channel (4Ω)

• Frequency Response: 10 Hz – 30 kHz (-3 dB)

• Total Harmonic Distortion: 0.02%

• Vacuum Tubes: 2 × 12AU7 (ECC82)

• Line Inputs: 4 RCA line-level inputs

• Phono Input: 1 (MM / high-output MC compatible)

• Phono Gain: 40 dB

• Phono Input Impedance: 47 kΩ

• Noise (line input max): 0.22 mV

• Power Consumption: 40 W (idle) / 500 W (max)

• Dimensions: 43 cm (W) × 38 cm (D) × 15 cm (H)

• Weight: 14 kg

• Power Supply: 120 VAC