PRS HDRX 20-watt Tube Electric Guitar Amp Head - Indigo Blue

PRS HDRX 20-Watt Tube Electric Guitar Amp Head - Indigo Blue | No Limit Guitar Co, Idaho Falls

*Pictures in this listing are authentic and were taken at our music store.

The PRS HDRX 20 is a Hendrix-inspired, all-tube guitar amplifier head that brings the legendary HDRX series down to a more manageable wattage without sacrificing an ounce of its British-voiced magic. Born from Paul Reed Smith and amp designer Doug Sewell's meticulous study of Jimi Hendrix's actual Woodstock-era amplifier, the HDRX 20 captures that late-'60s British tone and refines it with modern conveniences — including an all-new master volume that makes saturated, cranked tones accessible at any volume level. Whether you're a gigging professional or a serious home player chasing authentic tube breakup, the HDRX 20 delivers the dynamic range and tonal character that players have been chasing for decades.

Product Overview

The HDRX 20 is a 20-watt, two-channel all-tube head built around 5881 power tubes — a choice that delivers thick, articulate tone with a natural drive and breakup character that responds beautifully to playing dynamics at lower wattages. Three 12AX7 preamp tubes shape the signal upstream, contributing the warm harmonic complexity and touch sensitivity that define great British-style tube amplifiers. The Indigo Blue finish gives the head a distinctive, stage-ready presence that stands out from the usual black and white amp world.

Channel architecture takes a practical and elegant approach: the two channels are internally bridged, eliminating the need for the external jumper cables that players typically use to blend channels on vintage British heads. Per-channel volume controls allow easy, precise blending of the two voices, and the all-new master volume — a first for the HDRX series — makes it straightforward to achieve saturated, harmonically rich tones at living-room and rehearsal volumes without external attenuators or power soaks. This is one of the most meaningful additions to the HDRX platform since its introduction.

Tone shaping is thorough and familiar. A 3-band EQ handles the foundation, while a presence control dials in upper harmonic content and air. A 2-way bright switch and a High Mid Gain switch offer further sonic customization, expanding the range of voices available from a deceptively streamlined front panel. The output section provides flexible impedance options across three sets of speaker outputs — 16 ohm, 8/16 ohm, and 4/8 ohm — making the HDRX 20 compatible with a wide range of speaker cabinets. Bias is adjustable fixed, allowing the amp to be fine-tuned for optimal power tube performance over time.

Ideal For

• Blues, rock, and classic rock guitarists chasing authentic British-voiced tube tone inspired by Hendrix's Woodstock-era rig
• Players at No Limit Guitar Co in Idaho Falls looking for a premium boutique-quality tube amp head with real stage pedigree
• Home studio players and apartment musicians who need cranked tube saturation at manageable volume levels via the master volume control
• Gigging musicians who want a lower-wattage all-tube head with dynamic range, touch sensitivity, and flexible speaker impedance options
• PRS gear enthusiasts seeking the best low-wattage British-style tube amp head with American craftsmanship and tone refinement

Key Features

Hendrix Woodstock-Era Inspiration In 2018, Paul Reed Smith and PRS amp designer Doug Sewell were given direct access to Jimi Hendrix's actual Woodstock-era amplifier. After a meticulous study of its original circuitry, PRS retooled and refined the design, giving rise to the entire HDRX series. The HDRX 20 carries that DNA in a lower-wattage format built for the modern player.

5881 Power Tubes The pair of 5881 power tubes are central to the HDRX 20's character, providing thick, articulate tone that drives naturally and breaks up beautifully as wattage climbs — making the 20-watt format ideal for players who want real power tube saturation without the sheer volume of a 50 or 100-watt head. The dynamic range is exceptional, covering clean chime to crunchy grime purely through picking pressure.

All-New Master Volume Control New to the HDRX series, the master volume knob decouples output volume from preamp gain, making it easy to dial in fully saturated, harmonically rich tones at any volume level. This eliminates the need for external attenuators and opens up the HDRX 20's best tones to players in a wide range of environments.

Internally Bridged Channels The two channels are bridged internally from the factory, removing the need for external jumper cables to blend channel voices — a feature typically associated with vintage British heads that requires a workaround on most amps. Per-channel volume controls allow precise, independent level balancing for an effortless blend of the two tonal characters.

Flexible EQ and Tone Shaping A 3-band EQ, presence control, 2-way bright switch, and High Mid Gain switch provide a comprehensive and intuitive set of tone-shaping tools. Whether dialing in chiming clean tones, warm crunch, or saturated lead voices, the HDRX 20's control set covers the full tonal spectrum without unnecessary complexity.

What's Included

• PRS HDRX 20-Watt Tube Amp Head (Indigo Blue)
• Standard IEC AC Power Cable
• Manufacturer's Warranty

Technical Specifications

Experience the PRS HDRX 20 Today

The PRS HDRX 20 is one of the most historically grounded and tonally rewarding tube amp heads available at any wattage — and we have it in stock at No Limit Guitar Co in Idaho Falls. Come in and hear it for yourself, or contact us today to discuss availability. There is no substitute for plugging in and letting those 5881 power tubes do their work.