The Tech 21 Para Driver DI is a preamp pedal and direct box from Tech 21, built around the company's SansAmp Tube Amplifier Emulation and a semi-parametric EQ. Tech 21 describes it as a floor version of the SansAmp RPM rackmount preamp, offering "the same detailed tone shaping possibilities for any signal source"1. The maker says it "gives your instrument a natural warmth and presence, as if miking it through a tube pre-amp"1.
It is aimed at players who want one box to feed an amp, a recording desk and a PA. Bass Magazine notes there are "three different outputs to drive power amps, recording desks, PA mixers, or simply enhance your current rig"2. Though it sits in Tech 21's bass-oriented SansAmp family, the maker and press both frame it as a tool for virtually any instrument, not just guitar and bass3.
A floor version of the RPM rackmount preamp
The Para Driver DI is the pedalboard counterpart of the SansAmp RPM rackmount. Tech 21's product page states plainly that "this floor version of our RPM rackmount provides the same detailed tone shaping possibilities for any signal source"1. For a player, that means rack-style control over level, drive and a semi-parametric EQ in a box that measures 4.75″ x 3.75″ x 2″1.
The circuit's family tree goes back further. Tech 21 says the SansAmp Para Driver DI "evolved from the SansAmp Acoustic DI, which was released in 1997"4, a lineage Bass Musician Magazine's coverage confirms3. In 2005, the new design incorporated a Drive control and a footswitchable bypass, and it was renamed the Para Driver2. That makes 2005 the birth year of the pedal as currently known, which is what Tech 21's 20th anniversary edition, announced in 2025, marks2.
The SansAmp emulation itself is analog end to end. Tech 21 says "the 100% analog SansAmp Tube Amplifier Emulation technology encompasses the entire signal chain, from pre-amp to power amp" and speaker simulation1. Bass Musician Magazine echoes the point, noting "this 100% analog pedal is useful not only with guitar and bass, but virtually any instrument"3.
The controls and the Version 2 additions
The Para Driver DI carries active tone controls with 12dB of cut or boost4. Bass Musician Magazine lists these as "Active Bass & Treble, cut or boost ±12dB"3, and the semi-parametric midrange that gives the pedal its name lets a player sweep and set the frequency being cut or boosted.
The Drive control, added in the 2005 redesign, is described by Tech 21 as offering "some tasteful edge, just a little or over-the-top"4. Bass Magazine's take on the pedal's range: "The SansAmp Para Driver dials up big vintage tube tones, bright modern slap sounds, gnarly distortions, and everything in between"2.
| Control or feature | What it does |
|---|---|
| Drive | Adds edge, from a little to over-the-top4 |
| Active Bass & Treble | Cut or boost of ±12dB3 |
| Semi-parametric EQ | Detailed tone shaping for any signal source1 |
| Rumble Filter (Version 2) | Removes sub-sonic frequencies that cause boominess and handling noises on acoustic guitars1 |
| Air button (Version 2) | Adds top-end clarity and sparkle to acoustics4 |
| Footswitchable bypass | Added in the 2005 redesign2 |
Version 2 is the current form of the pedal. Tech 21 says "Version 2 has exactly the same tonality and functionality with the addition of two new features: Rumble Filter and Air"1. Both additions lean toward acoustic use: the Rumble Filter targets "unwanted sub-sonic frequencies that cause boominess and audible handling noises associated with acoustic guitars"1, while the Air button "adds top-end clarity and sparkle to acoustics"4. Players comparing the original against a Version 2 unit are otherwise hearing the same circuit.
The owner's manual includes sample settings for 23 instruments and applications, among them Acoustic Guitar, Mid-Boost Guitar, Champ, "Money for Nothing," Schenker, SVT Bass, Jaco Bass, Upright Bass, Electric Violin, Hammond Organ, Hip-Hop Drums and stomp box settings1. That range is a fair picture of how broadly Tech 21 expects the pedal to be used.
Inputs, outputs and power
The rear panel is built around a 1/4-inch 4.7 megOhm instrument level input1, a high enough impedance to keep passive pickups and piezo elements sounding full. From there the signal reaches 1/4-inch and XLR outputs with selectable levels1, which Bass Magazine counts as three different outputs for driving power amps, recording desks and PA mixers2.
Power options are unusually flexible:
- 9V alkaline battery, not included1
- Optional Tech 21 DC power supply, model #DC9; the former #DC2 and #DC4 supplies also work4
- Phantom power over the XLR line1
Because the Para Driver DI runs on phantom power, it can sit at the end of a long XLR run to a mixing desk with no battery or wall supply at all, which is handy for acoustic and multi-instrument rigs where the pedal lives away from a pedalboard power brick.
The 20th anniversary edition
Tech 21 marked the Para Driver DI's 20th anniversary with a limited edition of the pedal. Tech 21's own page for the edition describes it as "this 100% analog pedal" with the same feature set as the standard version, including the SansAmp Tube Amplifier Emulation covering pre-amp, power amp and speaker simulation4. As with Version 2 of the standard pedal, the edition carries the Rumble Filter, which removes unwanted sub-sonic frequencies that cause boominess and audible handling noises associated with acoustic guitars, and the Air button4.
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Questions
Is the Tech 21 Para Driver DI analog or digital?
It is 100% analog. Tech 21's SansAmp Tube Amplifier Emulation technology covers the entire signal chain, from pre-amp through power amp and speaker simulation, with no digital conversion anywhere in the path. Bass Musician Magazine's coverage of the 20th anniversary edition repeats the same claim.
Can the Para Driver DI run on a 9V battery?
Yes. The pedal is operable with a 9V alkaline battery, which is not included with the pedal. An optional Tech 21 DC power supply, model #DC9, is also available, and the former #DC2 and #DC4 supplies work as well.
Does the Para Driver DI work with phantom power?
Yes. Tech 21 lists the Para Driver DI as operable via phantom power, so it can be run off the 48V supply from a mixing desk delivered over the XLR connection, with no battery or external supply needed.
What did Version 2 of the Para Driver DI add?
Version 2 has exactly the same tonality and functionality as the original, plus two new features: a Rumble Filter that removes sub-sonic frequencies causing boominess and handling noise on acoustic guitars, and an Air button that adds top-end clarity and sparkle to acoustics.
What is the Para Driver DI based on?
It is a floor version of Tech 21's SansAmp RPM rackmount preamp, and it evolved from the SansAmp Acoustic DI, which was released in 1997. In 2005 the design gained a Drive control and footswitchable bypass and was renamed the Para Driver.
Sources (4)
- Paradriver DI, Tech 21 NYC, 2025-07-02
- Tech 21’s SansAmp Para Driver DI Celebrates 20th Anniversary With Limited Edition Model, Bass Magazine, 2025-09-02
- Gear News: Tech 21’s SansAmp Para Driver DI Celebrates 20th Anniversary, Bass Musician Magazine, 2025-09-02
- 20th Anniversary Para Driver DI, Tech 21 NYC, 2025-10-10
