The One Control Sonic Silver Peg is a bass preamp pedal designed by Bjorn Juhl that puts the character of a vintage Ampeg tube amp on a pedalboard. One Control says it "reproduces the sound of an iconic 70s tube amp with a similar name," and identifies that amp as the 100W "V4" tube amplifier released by Ampeg in the 1970s1. For a bass player, that means a preamp shaped around a classic amp's tone stack and input behavior rather than a generic EQ curve, in a box small enough to sit among other bass pedals.
As of late October 2026, the One Control USA product page lists the Sonic Silver Peg as sold out, so it is not currently available from the maker1.
An Ampeg V4-style bass preamp in a pedal
The Sonic Silver Peg is built around the sound of the Ampeg V4, a 100W tube amplifier from the 1970s. One Control describes the result as "This highly responsive bass pre-amp is adaptable to any style of play"1. The design goes beyond copying a tone curve: the pedal reproduces specific behaviors of the original amp, including an active mid control centered where the V4's sat, and a switch that moves between the sounds of the amp's two original inputs1.
One Control also says the pedal "succeeded in reproducing the power of the legendary amplifier by installing the Volume control at an early stage in the circuit," which is why the Volume knob behaves differently from a simple output level control placed at the end of a chain1.
The controls
The pedal keeps the control set close to the amp it is modeled on. There are three knobs on the face, a Volume control installed at an early stage in the circuit to reproduce the power of the original amplifier, an active Mid knob with a boost / cut of ± 15 dB centered around 800 Hz, and a Tone knob that controls a low pass filter which can sweep from 300 Hz to 10 kHz, plus a switch on the side of the enclosure that allows for a boost/cut of 15dB and a 0 dB / -15 dB switch to switch the sound of the two original inputs1.
| Control | What it does |
|---|---|
| Volume | Installed at an early stage in the circuit to reproduce the power of the original amplifier1 |
| Mid | Active mid control with a boost or cut of ±15 dB, centered around 800 Hz, like the original amp1 |
| Tone | Controls a low pass filter that sweeps from 300 Hz to 10 kHz1 |
| Side switch | Boost or cut of 15 dB1 |
| 0 dB / -15 dB switch | Switches between the sound of the two original inputs of the amp1 |
The Tone control is a low pass filter rather than a treble boost, so turning it down rolls off highs from 10 kHz down toward 300 Hz. The active Mid knob is the most powerful shaping tool on the pedal: 15 dB of boost or cut at 800 Hz is a wide range, enough to push a bass forward in a mix or pull the mids back for a rounder, darker sound1.
Power and connections
The Sonic Silver Peg runs on a 9V battery or a standard DC power supply, and draws only 2 mA1. That is an unusually low draw, so the pedal places almost no load on a pedalboard power supply. It uses true bypass switching, so the signal passes through untouched when the pedal is off1.
The 2 mA draw means the Sonic Silver Peg can share a daisy chain or a multi output supply with other low current pedals without straining it, but the maker's page does not state the polarity of the DC connector, so follow the markings on the pedal or its documentation when choosing a supply1.
Other specifications from One Control:
- Input impedance: 1 M1
- Output impedance: 20K1
- S/N ratio: -90 dB1
- Size: 39 W x 100 D x 31 H mm not including projections; 47 W x 100 D x 48 H mm including projections1
- Weight: approximately 160 g1
At roughly 160 g in an aluminum enclosure, the pedal is small and light by preamp pedal standards, which suits boards where space is tight1.
Price and availability
One Control lists the Sonic Silver Peg at a regular price of $154.99 USD, and the product page also shows $193.99 USD; the two figures appear on the same page and the page does not explain the difference1. As of October 2026 the pedal is listed as sold out by One Control USA1.
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Questions
Does the One Control Sonic Silver Peg run on a battery?
Yes. One Control lists the power options as a 9V battery or a standard DC power supply, so it can run either way. Its draw of only 2 mA also makes it easy to run alongside other pedals from a shared supply.
Is the Sonic Silver Peg true bypass?
Yes. One Control specifies True-Bypass Switching for the Sonic Silver Peg, so when the pedal is off the bass signal passes through without the circuit in the path.
What amp is the Sonic Silver Peg based on?
It is based on the 100W V4 tube amplifier that Ampeg released in the 1970s. One Control says the pedal captures a sound similar to that amp, including its active mid control and the character of its two original inputs.
Is the One Control Sonic Silver Peg still in production?
As of late October 2026 the One Control USA product page lists the Sonic Silver Peg as sold out, at a regular price of $154.99 USD. The page does not say whether more units are planned.
How much current does the Sonic Silver Peg draw?
One Control lists the consumption current as 2 mA at 9V, which is very low. That means it places almost no demand on a pedalboard power supply and can share an output with other low draw pedals.
Sources (1)
- SONIC SILVER PEG (OC-SSPn), One Control USA
