SansAmp™ Rack Manual
User Manual
Table of Contents
PSA and Classic pedal legacy Reimagined
Few names in analog amp simulation have carved a legacy as enduring as Tech 21’s SansAmp series.
Born in the early 1990s, the original SansAmp Classic pedal revolutionized direct recording and performance by offering guitarists and bassists the warmth and dynamics of a tube amp without the need for one. Its unique dip-switch configuration gave users precise control over gain structure, EQ character, and cabinet emulation in a compact and flexible format.
It was this very unit that Kurt Cobain famously used during the recording of “In Utero”, sculpting aggressive guitar tones directly into the console. Around the same era, Tchad Blake began using the Classic pedal as a signature part of his drum recording chain, running kick mics through it to add punch, growl, and harmonic grit. That tone became one of his trademarks.
As demand grew, Tech 21 released the SansAmp PSA-1, a rackmount version of the Classic with full preset memory and expanded control. Its all-analog tone and recallable settings made it a go-to studio tool for synths, vocals, drums, and more.
SansAmp™ Rack Plugin
Audiopunks and Tech 21 have come together to recreate both the SansAmp PSA-1 and the Classic pedal in plugin form. This collaboration brings the unmistakable SansAmp tone to your DAW, faithfully modeled from the original hardware units and expanded with modern features.
The SansAmp Rack plugin blends analog character with digital flexibility:
• Authentic tone from the Classic and PSA-1
• Stereo L/R and M/S linking for wide-format workflows
• Mix and Rack In/Out controls for better tone control.
The plugin's key features
Rack input
Rack output
Left/right or Mid/Side mode
Left/right or Mid/Side mode
Insert point for Left or Mid channel
Insert point for Right or Side channel
Input switch mode
Dip-switches for cab controls.
Guide to knobs controls
SansAmp Classic:
– LEAD: For sound of Mid-range and highs emphasized preamp.
-NORMAL: flat EQ preamp.
-BASS: Suited for rhythm as well as bass guitar.
PRESENCE: Shapes pre-amp contours in the upper mid-range. For maximum crunch, set on full.
AMPLIFIER: Shapes power amp contours. For heaviest distortion, set on full.
HIGH: Balances final EQ.Compensates extra high-end of guitar amplifiers during live use;suggest setting half-way or less.When recording direct in a studio, recommend setting be on full.
OUTPUT: Controls overall volume. Balance with Bypass signal for best sound.
SansAmp PSA-1:
BUZZ: Shapes low-end distortion. Turn up for a buzzy, saturated tone or down for tighter low-end and more clarity.
PUNCH: Controls midrange overdrive. Lower for smoother, vintage tones; raise for aggressive, mid-boosted drive.
CRUNCH: Adds upper harmonics and pick attack. Reduce for smoother highs or clean sounds.
DRIVE: Simulates power amp distortion. Higher settings add sustain and saturation, lower for more headroom.
LOW / HIGH: ±12dB active EQ. Tailored for musical tone shaping across instruments.
LEVEL: Sets overall output of the PSA-1 engine.