Rogue Audio RP-3 Preamplifier

The Cheapest Way Into Rogue's Flagship Architecture

The RP-3 takes the RP-X platform that sits under Rogue's reference preamplifiers and brings it to the bottom of that range. Pure Class A tube amplification with MOSFET output buffering, true balanced connections, and the same hand assembly.

Two 12AU7/ECC802 tubes do the work. Two pairs of balanced XLR inputs and three pairs of RCA line inputs take your sources. A balanced XLR output pair, two pairs of variable RCA outputs and a fixed pair go the other way, so a power amplifier and a subwoofer both have a home.

Balanced Is the Reason to Buy This One

True balanced XLR in and out is rare in tube preamplifiers at this price. It matters when the power amplifier sits across the room, because a balanced run rejects the noise a long single-ended cable would pick up on the way.

A defeatable OLED display reads volume and input from across the room, and turns off when you would rather it did not glow. A mono button helps with setup and with older recordings. Slow start circuitry protects the system at every power cycle, so nothing thumps through the speakers.

What the MOSFET Buffer Is There For

Tubes do the amplifying and MOSFETs do the driving. That combination is why output impedance comes in below 10 ohms, which is unusually low for a tube design and means the RP-3 is untroubled by a demanding power amplifier or a long cable.

Frequency response runs 5Hz to 100kHz within 1dB. Gain is 10dB through RCA and 16dB through XLR. Maximum output reaches 10V RMS single-ended and 20V balanced — more drive than any normal power amplifier will ever ask of it.

The Headphone Amplifier Runs on Tubes Too

Rogue built a tube-based, high-power headphone amplifier into the RP-3 rather than hanging a jack off the line stage. Difficult headphones get the same circuit topology your speakers do, so private listening stops being the compromise setting.

The chassis is 18.5 inches wide, 17 deep and 4.5 high, and it weighs 30 pounds of machined aluminum in black or silver. A ten-button remote handles the rest. Rogue covers it for three years, with six months on the tubes.

Who Is This Preamplifier Best For?

• Your system is balanced end to end — two pairs of XLR inputs and a balanced output pair are fitted, which is rare in a tube preamplifier at this price, so you keep the noise rejection you paid for on the rest of the chain.
• Your power amplifier is across the room — output impedance below 10 ohms and up to 20V of balanced drive mean a long cable run costs you nothing you can hear, so the amplifier can live next to the speakers.
• You want the flagship circuit without the flagship price — this is the RP-X platform Rogue uses further up the range, hand-built to the same standard, so you are buying the architecture rather than a simplified version of it.
• You listen on demanding headphones — the headphone amplifier is tube-based and high power rather than a jack hung off the line stage, so hard-to-drive models get real amplification from the same kind of circuit.
• You play records — the RP-3 has no phono stage — every input is line level, and stepping up from the RP-1 v2 means leaving its built-in phono behind. Add one of our phono preamplifiers on a line input and you choose the phono stage to match your cartridge rather than accepting the one that came in the box.

How Does It Connect to Your System?

Balanced sources take the two XLR pairs and line sources fill the three RCA pairs. A surround processor joins the unity-gain home theater bypass, so the front channels pass through untouched when you are watching a film.

Run the balanced XLR outputs to your power amplifier, or use the variable RCA pairs, with the second feeding a subwoofer. A processor loop sits alongside them. Headphones plug into the front and get their own tube stage.

Pairs Well With

Building a system around the RP-3? Start here:

• Power Amplifier: Balanced out, ready for a long run — browse Amplifiers.
• Phono Preamplifier: The one thing the RP-3 leaves to you — see Phono Preamplifiers.
• Interconnects: Balanced XLR is where this preamplifier earns its keep — see Interconnect Cables.
• Headphones: A tube headphone stage is waiting on the front panel — see Headphones.

Frequently Asked Questions

How many sources can I connect?

Five: two balanced XLR pairs and three RCA line pairs. A separate unity-gain bypass input takes a home theater processor without using one of them.

How do I connect a turntable?

Through an outboard phono preamplifier feeding one of the RCA line inputs. Every input on the RP-3 is line level, so the phono stage is yours to choose.

Will it drive a power amplifier down a long cable?

Yes. Output impedance is below 10 ohms and balanced output reaches 20V, so a long balanced run to a distant amplifier is what this preamplifier is built for.

Can it drive difficult headphones?

Yes. The headphone amplifier is tube-based and high power, built into the preamplifier rather than tapped off the line stage.

What tubes does it use?

Two 12AU7/ECC802 tubes, a common and affordable type that is straightforward to roll. Rogue covers the preamplifier for three years and the tubes for six months.

How big is it, and what finishes are there?

18.5 inches wide, 17 deep, 4.5 high and 30 pounds, in black or silver machined aluminum.

See It in Action

Our own walkthrough of the RP-3, its balanced connections and the tube headphone stage:

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