This amp is in mint condition. It is LOUD and sounds amazing! It has never left my non-smoking home studio. I bought it new less than a year ago. The only reason I’m selling it is because my son needs out-of-state medical treatment.

From the PRS website:

The PRS HDRX 100 captures the flexibility, power, and balance of late 60’s British-inspired tone. A continuation of PRS’s popular HXDA amplifiers, PRS HDRX amps feature a refined control layout and a newly-documented “Authentic Hendrix” Touring Circuit. This circuit is heavily inspired by one of Hendrix’s personal amps, purportedly used at Woodstock, which Paul Reed Smith and PRS Amp Designer Doug Sewell were able to study in 2018.

Designed to push the high-end so it is very clear, but not so much that it’s harsh, the PRS HDRX shines without glaring and allows for aggression that can be backed off for smooth, sweet tones. The PRS HDRX 100 is driven by four EL34EH power tubes, the best pre-amp tubes available, and a custom-designed Straight Edge output transformer. The power supply and filament design make the HDRX 100 remarkably quiet with little to no amp “hum or hiss.”

The PRS HDRX 100 features a 3-band TMB tone stack, 3-way bright switch, high-mid gain switch, and presence controls. These features mirror the historic amp and give players flexibility and increased control of their tone. The PRS HDRX 100 is also designed with internally bridged channels with individual volume controls. This eliminates the need for a jumper cable (historically used on the outside of the amp) and allows players to more easily dial in their distortion level and tone by blending the lead and bass channels’ individual volume controls, bringing more modern convenience to the amp.

Made in PRS Guitars Stevensville, Maryland, USA factory, PRS HDRX 100 amps are an exhaustive recreation of tone, a celebration of history, and a monument to modern technology. PRS has also designed matching 2x12 and 4x12 cabinets for the HDRX Amp family. Loaded with modified Celestion G12H-75 Creamback speakers, these cabinets push and punch to complete the package.

“Designing the PRS HDRX was not an exercise in over-engineering – it’s a fairly straightforward build with the right parts and circuit. We kept historic specs where it made sense, and we made substitutions based on availability, safety, and experience. In the end, I think we have made a great-sounding amplifier with exceptional build quality and enough power to blow your pantleg when you play it,” Paul Reed Smith.

Please note: This is a vintage stock volume amp. PRS recommends using a volume attenuator with these amplifiers. There are several good choices on the market. PRS recommends the Koch Loadbox LB120 II. Please note, these come in 16 and 8 ohm versions; make sure the resistance matches the cabinet being used.

Number of Channels

The HDRX 100 features internally-bridged channels with a shared 3-band TMB (treble, middle, bass) tone stack and preamp controls. The individual treble and bass volume control eliminate the historic channel jumper cable and allows players to dial in their distortion level and tone more easily by blending the lead and bass channels’ individual volume controls.

Vintage Design

The PRS HDRX 100 captures the flexibility, power, and balance of late 60’s British-inspired tone. This amp features a newly-documented “Authentic Hendrix” Touring Circuit, which is heavily inspired by one of Hendrix’s personal amps (purportedly used at Woodstock).

Wattage

As the name suggests, the HDRX 100 boasts 100 watts, making it not only an incredibly powerful amp, but a celebration and recreation of historic amps that often had to serve as PA’s. Please note, in accordance with that history, there is no Master Volume control. A volume attenuator is recommended.

SPECIFICATIONS

GENERAL

Available Configurations

Head Only

ELECTRONICS: Wattage 100 Output Transformer

Straight Edge 100 Watt Output

TUBES: Power Tubes(4) EL34Preamp Tubes(3) 12AX7 / ECC83FRONT

PANEL CONTROLS: Global Controls

Treble, High Mid Gain Switch (on/off), Middle, Bass, PresenceFront Panel Controls

Channel 1 Controls -Bass Volume

Channel 2 Controls -Treble Volume, Bright Switch (Off, Bright 1, Bright 2)

(Channels 1 and 2 are internally bridged)

BACK PANEL FEATURES

InletFused Power Inlet (IEC)Extension Speaker Jacks5Ohm Switching(2) 4 ohm & (2) 8 ohm parallel, (1) 16 ohmBiasAdjustable with Monitoring Jacks

HARDWARECoveringBlack TolexPipingBlack

MEASUREMENTSAmp Width21.5" (54.61 cm)Amp Depth10" (25.4 cm)Amp Height10" (25.4 cm)Amp Weight40 lbs (18.14 kg)

PREAMP TUBE POSITIONS & FUNCTIONSV1InputV2Cathode FollowerV3Phase Inverter

CONTROLSPRE-AMP SECTIONT/M/B Tone StackThe historic pre-amp tone stack of the HDRX 100 & 50 features treble, middle, and bass controls. This classic design driven by the cathode follower is placed later in the preamp circuit and is a big part of getting that wonderful midrange-driven, creamy British distortion. High-Mid Gain Switch

Historically, some of Hendrix’s amps feature a key capacitor that helps define the gain and voicing of the amp and some do not (the amp PRS documented contained the part). We have included the capacitor and put it on a switch, so players can easily bring it in and out of the circuit. This is a classic mod. In the down position, there’s a more vintage, thick tone. The up position provides more high midrange gain that helps cut through the mix.

Individual Treble & Bass Volumes: These controls regulate the output level of the internally-bridged channels. By individually setting the Treble and Bass Volume controls, players can better dial-in their tone and distortion.3-Way Bright SwitchHDRX amps feature a 3-way (off/on/on) bright switch, so players can set their brightness as desired when the treble channel volume control is below ten. Bright 1 is a standard value. On the Bright 2 setting, the brightness is further increased so players can reach their desired brightness at lower volumes.

GLOBAL FUNCTIONS & CONTROLS

Power On

PRS HDRX amplifiers feature a 2-way On/Off power switch. These amps were designed with historically-correct, high-power value capacitors and do not need a Standby Switch as part of properly powering on the amp. Mute the amp in lieu of a Standby Switch by simply pulling out the guitar input cable one click.

Presence

The Presence control resides circuit-wise in the power amp section and manipulates the negative feedback. Turn up the presence control to release more high-mid and treble into your sound. Depending on your preamp tone stack settings and your volume, the presence can change the volume and/or the texture of your high-end, making your amp wilder or more “present” sounding.Input

PRS HDRX amplifiers feature a single input. On the documented historic amp, there were four inputs. Historically, these channels were “jumped” so the two channels could be blended. Here, the treble and bass “channels” are internally bridged for modern convenience – eliminating the need for a jumper cable on the outside of the amplifier.