Explore SHIFT:  Demos | FOUNDRY Series


SHIPPING: All pedals are made-to-order by our small team of three partners. Orders ship within 1-2 weeks. Reach out any time for an update.


Our goal in creating the SHIFT was to fill what we saw as a hole in the market for a true studio-grade utility box. There are five main functional uses for the SHIFT:


1. Buffer & boost

2. Studio grade direct box

3. Tone color box

4. Re-amp tool

5. Cable extender system


1. World Class Buffer/Boost

The design of the SHIFT started with our time proven buffer/boost circuit found in all three versions of the PreDrive and LIFT. This buffer has been meticulously tested and used by thousands of guitarists world wide since it was introduced in 2014.


The SHIFT pedal remains always on, so the buffer is always active and the foot switch activates the boost mode with no electrical pop. We use our proprietary 36v internal power supply allowing for massive headroom. This makes having up to 30dB of crystal clean gain on tap possible for the first time in a pedal format from a basic 9v power supply. While this is more gain than most guitar amps can take, this gain amount may come in handy when using some of the other functions outlined below.


2. Studio Grade Direct Box

The SHIFT’s most significant use may be as a direct box. We call it an active/passive direct box design as it uses our buffer/boost circuit to drive a high quality, USA made transformer to balance the signal. To activate this mode simply switch the output mode mini-toggle to ‘B’ for balanced out mode.


This design is paramount and unique in the direct box world because it utilized an active gain stage to drive a transformer, just like high end studio mic preamps. This is often superior to a purely passive or purely active design because it is optimized to offer the advantages of both designs at the same time, while avoiding many of the shortcomings of the aforesaid designs.


This direct box has been carefully engineered for low noise and wide frequency response so it is perfect for bass, electric and acoustic instruments as well as keyboards or even dynamic microphones.


Literally anytime you would reach for a DI box, the SHIFT will offer supreme performance and sonic bliss. A ground lift is provided to solve ground loop issues via the mini-toggle labels GND.


3. Transformer Based Color Box

The output transformer can be activated via the output mini-toggle which, beyond direct box mode, can also be used with an unbalanced cable to add real analog color to the tone.


Perfect for those who need a little more vibe in their buffer/boost, which is designed to be very clean. Also great for amp sims and any other time you just need a little more analog vibe.


4. High Performance Studio Re-Amp Tool

The balanced line-in mode is designed to re-amp guitar takes in the studio. When the input mini-toggle is switched to ‘B’ for Balanced-in mode it activates a studio grade Burr Brown Line receiver stage that can be run at unity gain or line level via the PAD switch, which inserts a -20dB pad for accepting true line level signals.


The SHIFT in this mode can accept virtually any balanced signal and then convert it to an unbalanced signal for sending to your pedals or an amp with utmost fidelity and transparency. Use the PAD and Gain knob to adjust the gain staging until it is perfect for your use.


5. A No-Compromise Cable Extender System

Using two SHIFT boxes you can effectively make a super high fidelity cable extender system to rival anything currently on the market. The set up is simple. Use one SHIFT in direct box mode at the end of your pedal board. Use a TRS cable to XLR adapter (available separately) to send you signal up to 300 ft to your amp.


At your amp, plug in the other SHIFT in Balanced Line receiver mode with the PAD off and go into your amp. If both SHIFT’s are run in buffer mode there should be essentially zero signal loss up to 300 ft.


You can use the Gain on either side to add make up gain if necessary. Due the high headroom and high fidelity parts in the SHIFT, you will hear all of the detail and dynamics of your playing.


Never before has this number of utility operations been provided in a compact pedal format. The SHIFT does all of this with absolutely zero compromise in quality.


FOUNDRY Series - Dual Rail Power Supply
All Pettyjohn FOUNDRY Series now include one of our biggest innovations ever: a new proprietary dual rail charge pump. This little gem is a major upgrade from our CORE Series charge pump and is a sophisticated dual rail dc to dc converting internal power supply. Our charge pump provides an incredible +/-18v of internal power, for a total of 36v, and all from a standard regulated 9v power adapter (200mA). Say what!?


When you increase voltage you increase the headroom which then affects the tone and feel of a pedal. Dual rail power supplies are usually found only in classic studio gear, until now. The FOUNDRY Series charge pump delivers up to a massive four times the headroom of most guitar pedals. This high headroom imparts an openness and 3D quality that is unique to Pettyjohn FOUNDRY Series pedals. 36v is the maximum spec for most opamps empowering the high-qualify opamps in FOUNDRY Series pedals to operate at their maximum potential.


FOUNDRY Series - Silent Bypass
We have had many requests for this over the year and were happy to announce all FOUNDRY Series now shop with a totally quite foot switch enhanced with a sonically transparent gold contact relay. It auto-bypasses when the power is disconnected, never leaving you in the dark. Hardwire, classic true bypass is available via custom order on our website for those who may prefer this option.


FOUNDRY Series - The Indestructible Enclosure

While most pedal companies opt for an off-the-shelf enclosure, we took the path less traveled. FOUNDRY Series boasts a nearly indestructible two-plate custom enclosure design forged from mild steel right here in the USA. The boxes feature a gentle sloped front edge to protect the top control panel, features recessed bottom screws, and is finished with a thick powder blast of sparkling hues that will have you gitty as a goon.


FOUNDRY Series - Studio Grade Components

At Pettyjohn we build true studio-grade pedals. No, this isn't some cheeky marketing jargon; we accomplish extremely low signal noise with carefully selected top-shelf components:


  • Burr Brown OPA input and output buffer
  • Audiophile grade, through-hole 1% metal film resistors
Top-shelf WIMA and Silver Mica caps used in tone sensitive operations
  • Lead-Free PCB constructed with Audiophile lead-free silver solder

  • Carefully selected upgrade mods for every Pettyjohn pedal


PriceFrom $299.00
  • Jensen Nickle Transformer Mod - You can upgrade the stock Edcor steel-core transformer to a top-shelf Jensen JT-123-FLPCH transformer with a 50% nickle core. Jensen transformers are widely hailed as the best of the “clean” transformers, and this makes for an overall cleaner, more transparent sound when using the balanced out feature. Recommended if you are looking for ultra transparency in a direct box or those using the SHIFT as a cable extender.

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CORE Series was announced in 2020 as an approachable pedal line that dives deep into the realm of studio-grade analog boutique guitar pedals while leaving pretension at the door.

FOUNDRY Series is our original 'hold-nothing-back' lineup of studio-grade analog guitar pedals which we fully retooled in 2019 with all-new MKII versions of the entire line. With the introduction of MKIIs we unveiled our industry leading high-voltage power system, a new relay based quiet bypass circuit, custom enclosure enhancements and more.


Pettyjohn Electronics is a studio grade boutique guitar pedal company founded in 2014 by mastering and electrical engineer Stephen Pettyjohn.


Our engineering focuses on analog signal processing with discrete op-amps, high-voltage power pumps, and custom mods, with all stages using top-shelf audiophile componentry.


All Pettyjohn pedals are designed, forged and wired in the USA by our small team of three partners.


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