Rogue Audio RP-9v2 Preamplifier

The Flagship, Built on a Different Tube

The RP-9v2 sits at the top of Rogue Audio's preamplifier line, hand-built like the rest of the range. What sets it apart from the rest of the range is the tube. Four 6H30P triodes replace the 12AU7s used further down, in a balanced mu-follower circuit.

The 6H30P is a rugged Russian type with a long service life, and reference preamps costing far more use it for the same reason Rogue does. Moving to it meant redesigning the audio circuit and the power supply around it, rather than dropping a new valve into an old socket.

Bandwidth is the headline result. Response reaches 170kHz, well past anything you will hear, which keeps phase behavior tidy inside the range you do. THD stays under 0.1%, gain is 14dB through RCA and 20dB balanced, and maximum output runs to 10V RMS or 20V balanced. That drives any power amplifier you are likely to own.

Two Tube Watts for Your Headphones

The headphone jack is not a courtesy fitting. It is a tube-based amplifier making 2 watts, which is enough for demanding planars and high-impedance dynamics alike. Private listening runs through the same circuit design as the speakers, so late nights are not a downgrade.

Connections befit a flagship. Two XLR input pairs and three RCA line pairs handle five sources at once. Two XLR output pairs and two variable RCA pairs feed amps and a subwoofer, with a fixed pair for a recorder and a processor loop for movies.

A mono button helps with setup and older records. The OLED display reads clearly across a room and switches off when you want it dark, and the ten-function remote runs the lot. Slow-start sequencing and auto-mute protect the system at every power cycle. Thirty pounds of machined aluminum, with a 3-year limited warranty (6 months on tubes).

What Reviewers Are Saying

Bob Grossman of Enjoy the Music reviewed the RP-9 platform in May 2021, coming to it after three years with the RP-7. His verdict opened the summary: "Rogue Audio's RP-9 vacuum tube stereo preamplifier is magical!" He describes it as "dynamic, transparent, and revealing."

What changed for him was scale. "My sound stage took on a greater sense of depth, width, and height," he wrote, and found that "The attack and decay of notes had a greater and speedier delivery with more articulation."

Who Is This Preamplifier Best For?

• You want Rogue's best — the 6H30P tubes and the circuit built around them are the reason this model exists, so there is nothing further up the line to wonder about later.
• Your amps sit by the speakers — two XLR input pairs and two XLR output pairs keep the signal balanced end to end, so a long run to monoblocks arrives quiet and at full level.
• You listen on serious headphones — two tube watts drive demanding planars properly, which means you do not need to add a separate headphone amplifier to finish the system.
• Your system doubles for movies — the unity-gain bypass hands your front speakers to a surround processor at a fixed level, so one pair of speakers serves both systems.
• You play records — the RP-9v2 is a line-level design, so a turntable needs a phono stage ahead of it. Choose one to suit your cartridge from our phono preamplifiers and run it into any line input.

How Does It Connect to Your System?

Run the XLR outputs to your power amp, or use the variable RCA pair if the amp takes only RCA. Keep the second pair for a subwoofer or for biamping. Sources fill the XLR and RCA inputs, and a surround processor joins the bypass loop.

The fixed outputs feed a recorder. Headphones plug into the front panel and get two tube watts of their own. Switch it on, let the slow-start sequence finish, and the 6H30Ps take over.

Pairs Well With

Building around the RP-9v2? Here are some great companions:

• Phono Stage: Bring a turntable into the system — see our Phono Preamplifiers.
• Headphones: Two tube watts deserve a serious pair — see our Headphones.
• Interconnects: Quality XLR cables carry the balanced signal — see our Interconnect Cables.
• Audio Rack: Give this 30-pound flagship a proper home — see our Audio Racks.

Frequently Asked Questions

What tubes does it use?

Four 6H30P tubes in a balanced mu-follower circuit. The type is rugged, long-lived, and used in many reference-grade preamplifiers.

How does it differ from the RP-7v2?

The RP-7v2 runs 12AU7 tubes and reaches 100kHz. The RP-9v2 moves to 6H30Ps, extends response to 170kHz, and adds a 2-watt headphone amplifier.

How balanced is it, really?

Fully balanced through the signal path, with two XLR input pairs and two XLR output pairs. Balanced gain is 20dB, with up to 20V RMS available.

Does it have a headphone output?

Yes, a tube-based amplifier delivering 2 watts through a standard quarter-inch front-panel jack.

Does it work with a home theater?

Yes. The processor loop offers unity-gain bypass, so a surround processor can share your main speakers at a fixed level.

What warranty does it carry?

A 3-year limited warranty, with 6 months on the tubes.

See It in Action

Stereophile visits the Rogue Audio room at AXPONA:

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