The Sonic One Loop is a multifunctional pedal from Sonicake that combines three jobs in one enclosure: AB line selection, a loop, and a buffer. Instead of buying separate units for switching between two signal paths and for buffering a long cable run, it puts all three on one small pedal. Sonicake lists it at a regular price of $39.99 USD1.
What it does
Sonicake describes the Sonic One Loop as "a multifunctional pedal equipped with AB line selection function, Loop function, and Buffer function"1. For a player, that breaks down into three practical uses. The AB line selection lets you send your guitar to one of two signal paths, for example a clean amp and a dirty amp, or a dry signal and an effects chain. The loop lets you place a pedal or chain of pedals in and out of the signal path. The buffer helps keep your tone intact over long cable runs, and it can be applied to either of the two lines23.
The footswitches and gear shift switch
The pedal is controlled by footswitches and a single switch, and each has one job23:
- A/B line selection footswitch: tapping it chooses line A or line B3
- Loop footswitch: tapping it turns the loop on or off3
- Gear shift switch: controls the buffer function of the two lines, so you can decide which of the two paths gets buffered3
That arrangement means the two most common actions, switching lines and toggling the loop, each get their own footswitch, while the buffer setting is a set-and-forget choice made with the gear shift switch rather than something you change mid-song23.
Power and specifications
The Sonic One Loop runs on a DC 9V supply with a 5.5 x 2.1mm center negative connector and draws 6mA1. That is a very light draw by pedal standards, so it will run comfortably from any spare output on a standard pedalboard power supply.
Sonicake's specifications list DC 9V power only, with no battery option, so you will need a 9V DC center negative power supply to use the pedal1.
The pedal is true bypass, which Sonicake says "maintains the original sound of the instrument" when it is out of the circuit1. Physically it is compact: 115mm deep, 65mm wide, and 34mm high, weighing 262g1.
Where it sits among buffer pedals
On its own, the Sonic One Loop is a utility pedal rather than a tone-shaping one, and it sits in the same space as dedicated buffer pedals like the TC Electronic Bonafide Buffer or the JHS Pedals Little Black Buffer. What sets it apart is the combination: few pedals at this price add A/B line selection and a loop on top of buffering. Sonicake also makes the related Sonicake Buffer ABY for players whose switching needs run to more outputs41.
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Questions
Is the Sonicake Sonic One Loop true bypass?
Yes. Sonicake states the pedal uses true bypass, which the maker says maintains the original sound of the instrument when the pedal is not engaged. That matters on a pedalboard because a true bypass pedal leaves your guitar's signal untouched when it is switched off, unlike a buffered bypass design that always sits in the signal path.
Does the Sonicake Sonic One Loop need a battery or a power supply?
The pedal runs on a 9V DC supply with a 5.5 x 2.1mm center negative connector and draws 6mA. Sonicake's specifications list no battery option, so plan on using a standard pedal power supply. The low 6mA draw means almost any supply with a spare output can run it.
What is the Sonicake Sonic One Loop's model number?
The model number is QCS-01. Sonicake lists the pedal under that product name on its own product page, and it is the designation to look for when matching the pedal to its user manual.
How much does the Sonicake Sonic One Loop cost?
Sonicake lists the Sonic One Loop at a regular price of $39.99 USD as of the maker's product page dated October 2026. It is positioned as a budget-priced utility pedal that combines three functions in one enclosure.
What does the gear shift switch do on the Sonic One Loop?
According to Sonicake, the gear shift switch controls the buffer function of the two lines. In other words, it lets you decide whether the buffering is applied to line A, line B, or both, depending on how your signal is routed through the pedal's A/B selection.
How big is the Sonicake Sonic One Loop?
Sonicake gives the dimensions as 115mm deep by 65mm wide by 34mm high, with a weight of 262g. That is a compact footprint by pedal standards, small enough to fit between other pedals on a crowded board.
Sources (4)
- Sonic One Loop AB line selection/Loop/Buffer function in Effect Pedal, Sonicake
- Sonic One Loop AB line selection/Loop/Buffer function in Effect Pedal, Sonicake
- Sonic One Loop AB line selection/Loop/Buffer function in Effect Pedal, Sonicake (de.sonicake.com)
- Sonic One Loop AB line selection/Loop/Buffer function in Effect Pedal, Sonicake
