Paul Reed Smith (PRS) HDRX100 "Hendrix Circuit" 100w Amp Head

100 Watts | PRS “Hendrix” Circuit | EL34 Power Tubes

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.

SPECIFICATIONS

ELECTRONICS
Wattage (nominal) 100
Output Transformer Straight Edge 100 Watt Output
TUBES
Power Tubes 4x New Sensor EL34EH
Preamp Tubes 3x JJ ECC803S
Preamp Positions V1- Input, V2- Cathode follower, V3- Phase Inverter
FRONT PANEL CONTROLS
Channel 1 Controls Bass Volume with common Presence, Bass, Middle,
Mid Gain (on/off), Treble, Lead Volume,
3-Way Bright Switch (Off, Bright 1, Bright 2)
Channel 2 Controls Lead Volume with common Presence, Bass, Middle,
Mid Gain (on/off), Treble, Bright (Off, Bright 1,
Bright 2), Bass Volume
BACK PANEL FEATURES
Inlet IEC w/ integrated fuse
Bias Adjustable
Channels 2, Internally Bridged
Output Jack Configuration/Ohm Selection 2x4, 2x8, 1x16
MATERIALS/COVERING
Covering Black Tolex
Piping Black
Trim Panel Black Tolex
MEASUREMENTS
Amp Width 21.5”
Amp Depth 10”
Amp Height 18”
Amp Weight 25.0 lbs