New customers get 15% off select gear. Discount Code : Newcustomer15
  • Your cart is currently empty.

Total - $0.00

Pettyjohn Electronics ROUS

By Pettyjohn Electronics | SKU: RGS-PJE-ROUS |

ROUS: Distortion of Unusual Size The ROUS, “Rodent of Unusual Size”, is a highly evolved member of the RAT family. The ROUS  features a simple but powerful four knob control set: Level, Gain, Lows and Highs, similar to the other CORE ser...- Read More

Details Reviews FAQs

ROUS: Distortion of Unusual Size

The ROUS, “Rodent of Unusual Size”, is a highly evolved member of the RAT family. The ROUS  features a simple but powerful four knob control set: Level, Gain, Lows and Highs, similar to the other CORE series pedals. It’s gain range moves from low gain overdrive to unusually large sounding distorted tones quickly with the turn of the GAIN knob. One may take matters of fate into their own hands and journey deeper into the un-known with a flick of the Fire Swamp switch. Pettyjohn fans have long requested a distortion, and we have spent several years honing this creation, wanting to live up to it’s fantastical origins and be worthy of the name Pettyjohn. Explore the feature set in detail below and for those looking to choose their own adventure, you can discover more paths to sonic nirvana with custom mod options only available from the Pettyjohnonline shop.


The GAIN control moves the internal gain amp from a relatively low gain overdrive into all out distortion fairly quickly, though no doubt, some will enjoy the low gain magic this box has to offer. We tried to keep the max gain somewhere in the neighborhood of the original design but this is by no means a clone so it has its own thing going on! Much like the original, the gain amp drives an array of diodes in shunt position but we have take several years to fine tune this array to be something a little more unique in the pedal world. Furthermore, we couldnt decide on our favorite setting so we included a mini toggle switch for you to choose two options with… enter the Fire Swamp. 


The Fire Swamp switch adjusts the diode clipping array between two settings that make for a remarkable change in tone. We can not reveal all of our tone secrets but we can say that the FIRE setting is pure silicon hard clipping,and this setting most closely resembles the original rat design, making it great for more aggressive rock tones. The SWAMP setting adds some mystical Germanium into the equation and increases the headroom and softens the clipping effect in a vintage, musical way that we love. The SWAMP is perfect for less aggressive genres, like country, pop, blues and indie players who would normally find it in-concievable to use rodent style drive. 


The ROUS features our CORE series dual rail doubling power supply, which can scale from +/-7v to +/-18v, effecting the headroom, tone and feel of the pedal. The internal supply achieves this by mirroring whatever input voltage you apply via the external power supply. 


The LEVEL control has been carefully placed in the circuit to control the overall level of the signal and help deal with the huge amount of gain. It is also fully buffered from the outside world and will not load or tone suck, AND the ROUS loves to be stacked with other drive pedals! 


The LOWS control has been designed for the CORE series and offers a huge sweep range from sub 30Hz to beyond 1kHz, rolling off at 18db/octave. This control is located before the GAIN stage and greatly impacts how the circuit distorts. Keep this in mind as you experiment with the control at the extremes and you’ll find a vast array of overdrive and distortion and tones just by sweeping the LOWS control. 


The HIGHS control has been re-designed as well for the CORE series and is now fully buffered against any external loading making it more robust than ever. The ROUS generates a huge amount of high end harmonics and you can easily tame it or unleash the wrath with this wide range control that sweeps from 22kHz down to 1kHz. 

Quiet Bypass

The CORE features a big update first introduced in our flagship Foundry MKII line: our quiet bypass switching system. It is a true bypass, relay based system for minimum pop when engaging the effect. If you happen to use a true bypass looper and want state memory we offer the pedal with Hard Click True Bypass via our custom shop as a post-purchase mod or at time of purchase via our online shop.  


  • Versatile, overdrive and distortion circuit with deep nostalgic origins. 
  • Extended gain range over the original, specifically with better low gain characteristics
  • FIRE-SWAMP switch for two special tone experiences in one pedal.
  • Buffered Level control for no tone suck or loading with other pedals.
  • Re-designed LOWS circuit that sweeps from 30Hz to 1kHz before the GAIN stage, which interacts with the distortion.
  • Active 18db/oct sweepable HIGHS control, comes after the gain stage with a wide sweep from 22kHz down to 1 kHz, it can powerfully shape the harmonics content.
  • High headroom with internal doubling from 7v-18v power input.
  • Draws under 100mA.
  • Quiet bypass relay based true-bypass system for quiet switching.
  • Hard Click footswitch true-bypass available via custom shop or as a post purchase upgrade for True-bypass looper setups.
  • Designed for guitars, bass and keys.
  • Low noise with premium analog parts
  • Hand made in Oregon, USA.
  • New enclosure by GORVA design.
  • Rear mounted jacks.

Do you need help with something? Click here to speak with a live support agent.

What type of payments do you accept?

We accept payments from MasterCard, Visa, Discover, American Express and PayPal. You can read about our financing options here.

What is your shipping policy?

We will ship completed orders Monday-Friday. Orders placed and paid before 1:00pm. PST will ship that same day. All completed orders after the cutoff time will ship the following business day. RGS does not ship on Saturday or Sunday.

What is your return policy?

We offer a 30 day Exchange policy for new purchases. We ask that you please return the product in the original product packaging along with all included materials (manual, warranty card, all accessories) and in the original condition that it was received and we will exchange it for any product on ours site. Please note that we do charge a $5 dollar exchange fee to cover our shipping cost. We are a small business and do not offer a cash refund. We cannot take returns on sealed product. We do not accept returns for guitars and amplifiers under any circumstances. Unfortunately we also cannot cancel orders or pre-orders. We are happy to exchange for another product if you are no longer interested in the new release or backordered items

Others Also Viewed