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Vongon Ultrasheer Stereo Reverb and Vibrato Pedal

Stereo reverb and vibrato pedal inspired by the early digital studio effects units of the late 1970s providing sounds from a lush warbled space to a shallow room through an intuitive and satisfyingly tactile interface

MFR# Ultrasheer

Product Description

The Vongon Ultrasheer Stereo Reverb and Vibrato Pedal is a stereo reverb and vibrato combination inspired by the early digital studio effects units of the late 1970s, capable of moving you from a lush warbled space to a shallow room through an intuitive and satisfyingly tactile interface.


The reverb algorithm is based on the plate reverb sounds of the classic Lexicon 224 from 1978. The digital processing is downsampled to 16 bits and follows the topology described in the Dattorro paper linked here. This mix of legacy digital processing with modern high-quality hardware creates a retro lush sound that we love.


The vibrato is a smooth and transparent digital pitch shifter that preserves the full bandwidth of your input signal and does not darken the sound which is often found in the analog counterparts. Two modulation waveforms are available, “cycle” which is a sine wave for classic Leslie-speaker-type sounds and “random” which is a smoothed sample and hold waveform that creates pitch warbles similar to a warped vinyl or sun-baked cassette.

Dynamic Stereo Routing

The digital processing automatically adjusts for mono in/mono out, mono in/stereo out, or full stereo based on the configuration of input and output cables plugged into the device.

Walnut Enclosure

Housed in a high-quality single block of dark walnut that is CNC routed, hand sanded and polished.


  • 32-bit floating point DSP (except for 16-bit vintage reverb algorithm)
  • 24-bit/48 khz digital converters
  • Input impedance: 53 kOhms
  • Output impedance: 40 Ohms
  • Analog buffered bypass
  • Soft touch footswitches
  • Stereo/Mono modes automatically selected based on the cables plugged in
  • Genuine Rogan knobs made in USA
  • Wooden enclosure made from a single block of dark walnut
  • Matte black aluminum faceplate with gold traces
  • Power - 2.1mm 9VDC Center Negative 180 mA
  • Dimensions - 6.5" wide, 5.5" long, 2.25" tall
  • Designed and built in Oakland, California U.S.A.

Product Specifications

Condition New
Width 6.5 in
Height 2.3 in
Depth 5.5 in
Input Connectors 1/4-inch TS
Output Connectors 1/4-inch TS
Power Supply Required (not included)
Power Consumption 180 mA

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
James P.
Thank you so much! Vintage King has been so fair and easy to work with. I can't thank you enough. It feels good to trust such a hefty purchase to folks who are so helpful and knowledgeable. Vintage King is a sound designers dream store.
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From the minute I placed my order I was kept well-informed through each step in your process. Even though I was buying a comparatively modest piece of gear, your attention to detail made me feel like I was purchasing a six-figure mixing desk.
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