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Rogue Audio The Cronus Magnum III
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The award winning integrated amplifier has garnered an enviable reputation in the high end audio world. Even at its attainable price, it outperforms other integrated amps costing many times more. The pure tube design provides a smooth, almost liquid sound that has made this amp a reviewer favorite. With circuitry borrowed from our most advanced amplifier designs, the 100WPC effortlessly reproduces even the most demanding musical passages.
The Magnum III features a number of exciting new upgrades. For vinyl enthusiasts the phono section has been completely redesigned to accommodate both MM and MC cartridges. Two gain settings provide for 45dB and 60dB of gain so you can now use either high or low output cartridges. The phono also has five individual load settings so you can fine tune the phono for optimal results.
A Triode/Ultralinear switch allows for on the fly switching between Ultralinear operation and pure triode. Ultralinear offers the most power and a commanding grip on the bass while triode provides a slightly softer and more romantic sound.
A completely new headphone circuit is based around MOSFET buffers capable of massive current sourcing. The design is basically a simplified single ended version of our RH-5 headphone amplifier and puts out enough power to drive the most difficult headphones for clean crisp personal audio.
The line stage has been improved and has an amazingly low noise floor for a completely black background for your listening.
From a technical standpoint the amplifier uses a triode preamplifier coupled to our excellent Atlas Magnum power amplfier. A large oversized linear power supply stores tremendous energy for low frequency response and dynamic headroom. The tube circuitry is cutting edge with short signal paths exacted in a low noise design. Finally, precision components are used to provide the transparency and air that are so critical to accurate musical reproduction.
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Rogue Audio Cronus Magnum III
The Cronus Magnum III is a muscular, all‑tube integrated that pairs 100 WPC of real-world power with the lush harmonic richness tube lovers crave. Reviewers note a wide, three-dimensional soundstage and coherent tonal body that favors a full, natural midrange, weighty bass and a sweet, extended treble—delivering both rhythmic punch and evocative musical color. Ron Nagle -- Enjoy the Music.com and Hi‑Fi Choice highlight the amplifier's headroom and timing, uncommon for tube designs at this level. Built like a tank with machined aluminum trim and a hefty linear power supply, it includes a robust MM/MC phono stage, buffered sub outputs and a headphone amp—ideal for listeners who want tube character without sacrificing drive. For systems that need both presence and refinement, the Cronus rewards auditioning and system matching.
Pros
- Unusually high headroom and dynamic drive for a tube integrated—able to deliver 100W into 8Ω for confident control of modern speakers.
- Rich, coherent tonal presentation with natural harmonic overtones and a spacious, three‑dimensional soundstage.
- Robust, no-compromise build: heavy chassis, machined aluminum faceplate, large linear power supply and US hand-built construction.
- Feature-rich analog connectivity—comprehensive MM/MC phono options, buffered variable outputs for subs/bi‑amping and a substantive headphone stage.
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Cons
- Some user adjustments are fiddly: changing phono settings and speaker-tap configurations requires removing the lid and internal switches.
- Exposed valves and the standard open aesthetic mean it’s less child/pet friendly and the remote offers only basic volume/mute control.
Sound Quality
92/100
Dynamics
92/100
Reviewers repeatedly note abundant headroom and reserve ('100W on tap and enviable reserves of current', 'effortlessly muscular'), with punch and timing described as 'deeply impressive'—notable for a tube amp of this power. Comments about razor-edged transient attack combined with tube warmth support high dynamics for its topology and output.
Soundstage Imaging
91/100
The amplifier is frequently credited with strong three-dimensionality and a large, well-defined soundscape ('effortless three-dimensionality', 'dimensional expansion of the sound scape'). Reviewers describe clear performer placement and an engaging front-of-stage presentation, indicating excellent imaging and depth.
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Build Quality
93/100
Reviews emphasize serious, no-cost-cutting construction: heavy 55 lb chassis, machined aluminum faceplate, heavy 2 oz copper PCB, and US hand-built workmanship. The large linear power supply and robust physical design support the perception of high build quality and reliability.
Features Connectivity
88/100
Baseline features are solid: four RCA inputs including a talented moving‑mag phono stage, variable and fixed outputs (buffered variable outputs for subs/bi‑amping), a dedicated headphone output, and an aluminum volume/mute remote. No digital inputs, no DAC, and no balanced XLR I/O, so the unit is well‑featured for an analog/tube integrated but not fully loaded.
Value for Money
92/100
Multiple reviewers call it 'one of the most compelling sonic performers at this price point' and note you can 'easily build a very rewarding system' around it at ~$2,995, framing the Cronus Magnum III as a justified premium purchase. The consensus praises its performance-to-price balance in its segment.
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