Rogue Audio
Rogue Audio Atlas Magnum III Stereo Tube Power Amplifier (Silver)
Best tube amplifier for audiophiles seeking versatile, high-performance sound.
Experience exceptional audio with the Rogue Audio Atlas Magnum III Stereo Tube Power Amplifier. This amplifier delivers 100 watts per channel, offering a captivating tube sound with remarkable detail and dynamic range. Its unique Ultralinear/Triode switch allows you to tailor the sonic signature to your preference, from punchy clarity to smooth warmth. Built with a massive power supply and precision components, it ensures transparent and accurate musical reproduction. Handcrafted in the USA, the Atlas Magnum III is designed to deliver outstanding performance that surpasses its price point, providing a truly immersive listening experience.
$2695.00
More Atlas Magnum Options
Owner Satisfaction
4.7
/ 5
Category Rank
325
/ 1688
#325 in Power Amplifiers
Price vs Category Average
-67%
Below average
Power Output
10060
/ WPC (ultralinear), WPC (triode)
Who it's for
- Audiophiles seeking rich, detailed, and expansive tube-driven sound
- Tube amplifier owners wanting a hassle-free, maintenance-light experience
- Listeners pairing tube warmth with power-hungry, demanding speakers
Who should skip it
- Budget-conscious buyers wary of recurring maintenance and tube replacement costs
- Users with limited ventilation or small, enclosed listening environments
- Shoppers comparing high-end tube performance against more affordable solid-state options
Performance breakdown
Sonic Versatility
Switchable modes offer distinct tonal profiles for any listening preference.
Power Delivery
Massive power supply ensures effortless drive for demanding speaker loads.
Build Integrity
Handcrafted American construction provides exceptional long-term reliability and finish.
Maintenance Accessibility
User-friendly bias adjustment makes tube management simple for enthusiasts.
Dynamic Range
Delivers punchy, transparent sound with impressive depth and musicality.
Component Quality
Premium internal parts ensure high-fidelity signal reproduction across the spectrum.
Key Specs
Power Output
100 WPC (ultralinear), 60 WPC (triode)
Tube Complement
2 × 12AX7, 2 × 12AU7, 4 × KT120
Frequency Response
20 Hz - 30 kHz
Input Impedance
200K ohms
Output Taps
4 ohm and 8 ohm
Inputs
Gold-plated RCA
Outputs
Heavy-duty gold-plated binding posts
Dimensions
18" W x 17" D x 6.75" H
Features
- 100 watts per channel pure tube power
- Switchable Ultralinear/Triode mode
- Optimized circuitry with upgraded components
- Massive linear power supply
- Precision components for transparent sound
- User-friendly bias adjustment
- Handcrafted in the USA
- Slow start turn-on sequencing
What customers say
Customers overwhelmingly praise the Rogue Audio Atlas Magnum III for its truly exceptional sound quality. Reviewers consistently highlight its warm, rich, and detailed sonic signature, which creates an immersive listening experience. The amplifier is lauded for producing a wide soundstage with precise imaging and excellent instrument separation. Furthermore, the build quality garners high marks, reflecting robust construction and premium craftsmanship. While a significant investment, users feel the Atlas Magnum III offers outstanding value in the high-end segment. Its superb performance and profound musical enjoyment solidify its reputation as a top tier component.
Know before you buy
Ultralinear mode provides 100 watts per channel for maximum power and punchy, detailed dynamics. Triode mode reduces the output to 60 watts per channel, offering a smoother, warmer, and more intimate sound signature.
The amplifier features a user-friendly bias adjustment system. You can easily monitor and calibrate the bias using the integrated meter and controls, ensuring your tubes operate at peak performance without needing professional service.
Yes, the Atlas Magnum III includes dedicated output taps for both 4-ohm and 8-ohm speakers. You should connect your speakers to the corresponding terminals on the back to ensure optimal power delivery and impedance matching.
The slow start feature gradually powers up the amplifier to protect the internal components and extend the lifespan of the vacuum tubes. This prevents the electrical stress that can occur during a sudden, full-power startup.
With 100 watts per channel in Ultralinear mode and a massive power supply, this amplifier is capable of driving a wide range of speakers, including those with lower sensitivity. However, always check your speaker's impedance requirements to ensure they are compatible with the 4 or 8-ohm output taps.
The Atlas Magnum III uses a complement of two 12AX7s, two 12AU7s, and four KT120 power tubes. These were selected to balance high-fidelity transparency with the classic harmonic richness expected from a high-end tube amplifier.
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$2695