Rogue Audio Ares II Tube Phono Preamplifier

A Genuine Tube Phono Stage, Not a Hybrid

The Rogue Audio Ares II is an MM/MC phono preamplifier built with four vacuum tubes: two 12AX7s and two 12AU7s. It's a fully tube-based design, not a solid-state circuit with a tube added for flavor.

This is the standard Ares II, distinct from Rogue's pricier Ares II Magnum. The Magnum upgrades internal parts for even lower noise; the standard Ares II keeps the same core circuit at a more accessible price.

Custom Cinemag step-up transformers handle moving coil gain internally, rather than requiring a separate outboard step-up box. Heavy, 2-ounce copper circuit boards are used throughout for a solid electrical foundation.

A fully regulated outboard power supply, built around a toroidal transformer, includes a timer-delayed start to protect the tubes at power-up.

Three Gain Settings for MM and MC Cartridges

Gain switches across three levels: 40dB, 55dB, and 64dB, covering moving magnet through low-output moving coil cartridges.

Internal settings cover most popular loading options, with selectable capacitance at 150pF or 0pF. A built-in subsonic filter helps tame rumble from a warped record or a turntable prone to footfall.

Rogue describes the RIAA equalization as precise, though it doesn't publish an exact tolerance figure.

It measures 17 by 9 by 5.5 inches and ships at 21 pounds, reflecting its outboard power supply and internal transformers.

Who Is This Preamp Best For?

• Listeners who want genuine tube sound. All four tubes are in the actual signal path, not just a marketing accent.
• Owners of both MM and MC cartridges. Three gain settings and built-in step-up transformers cover a wide range of both.
• Anyone who wants MC step-up built in. Custom Cinemag transformers handle it internally, without a separate outboard box.
• Listeners who enjoy tube maintenance and tinkering. Tubes are user-replaceable, letting you experiment down the road.
• Not the right fit for anyone chasing the lowest possible noise floor. Rogue's pricier Ares II Magnum upgrades internal parts specifically for that.

How Does It Connect to Your System?

Run your turntable's phono cable into the Ares II's RCA input, then connect its RCA output to a line-level input on your amplifier or preamp.

Set the internal gain and loading to match your cartridge before you start listening. Give the tubes a few minutes to warm up for their best sound.

Pairs Well With

Building your system? Here are some great companions for the Rogue Audio Ares II:

• Turntables without a built-in phono stage
• Phono cartridges, MM or MC, matched to its switchable gain
• Interconnect cables to connect its output to your amp

Frequently Asked Questions

What tubes does it use?

Two 12AX7 tubes and two 12AU7 tubes. They're user-replaceable, so you can swap in new tubes as they age or to experiment with the sound.

How is this different from the Ares II Magnum?

The Magnum uses upgraded internal parts for even lower noise, at a higher price. The standard Ares II shares the same core circuit and features.

Do I need a separate step-up transformer for a moving coil cartridge?

No. Custom Cinemag step-up transformers are built in, handling MC gain without any extra outboard box.

What's the warranty?

Rogue Audio covers the Ares II with a three-year limited warranty, with tubes covered separately for six months.

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Learn More

Want to learn more about tube versus solid-state phono stages, matching a preamp to your cartridge, or getting the most from your vinyl collection? Visit our Learning Center for guides, tips, and expert advice.