The Tone City Tremble is a compact tremolo pedal made by Tonecity Audio. Tremolo modulates a guitar's volume in a repeating cycle, the effect built into many classic amplifiers, and Tonecity Audio describes the Tremble as reproducing "the built-in tremelo like classic amplifiers from the 50s and 60s, gets you warm, full and true tone."1
The maker positions it as a space-saver as much as a sound-shaper: "Tremble is exactly a good choice and small enough to add to practically any pedalboard!"1 For a fuller look at what tremolo pedals do and how they differ, see the site's Tremolo Pedals page.
Sound and character
Tonecity Audio's description of the Tremble leans on the amplifier-borne tremolo of the mid-century era, promising a warm, full tone in that style.1 The maker also highlights its range of uses: "This effect is extremely popular for creating large swelling chords and surf-style sounds, it offers all of that classic tremolo character," adding that the pedal is "incredibly tweakable and simple to operate."2
For surf players, that swelling-chord character is the classic application: the pulsing volume movement behind reverb-drenched rhythm playing. The maker names surf-style sounds directly as a strength of the pedal.2
Power and connections
The Tremble runs from a DC 9V adapter and draws 3 mA, a very light load that any standard pedalboard power supply output can handle.2
Tonecity Audio states that the pedal "is powered by DC 9V power supply" and does not describe battery operation, so plan on using a 9V adapter.2
Its input and output impedances are listed by the maker as follows.2
| Specification | Value |
|---|---|
| Input impedance | 500K |
| Output impedance | 10K |
| Power supply | DC 9V adapter |
| Current draw | 3 mA |
| Bypass | True bypass |
Size and weight
The Tremble's compact format is one of its main selling points. Tonecity Audio lists its dimensions as 9.4 cm long, 4.5 cm wide and 4.8 cm high, with a net weight of 0.26 kg.2 Combined with the 3 mA current draw, that makes it an easy fit on a crowded board alongside other Tremolo Pedals or effects of other types.
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Questions
Is the Tonecity Tremble true bypass?
Yes. Tonecity Audio lists the Tremble as true bypass, meaning that when the pedal is switched off, your guitar's signal passes through it without any of the pedal's circuitry in the path. That helps keep your clean tone unchanged when the tremolo is not in use.
Can the Tonecity Tremble run on a battery?
Tonecity Audio's product page states that the pedal is powered by a DC 9V power supply and does not describe battery operation. Plan to use a 9V adapter, which is straightforward given the pedal's very low 3 mA current draw.
How big is the Tonecity Tremble?
Tonecity Audio gives the Tremble's dimensions as 9.4 cm long, 4.5 cm wide and 4.8 cm high, with a weight of 0.26 kg. That compact footprint is why the maker describes it as small enough to add to practically any pedalboard.
Is the Tonecity Tremble good for surf guitar?
Tonecity Audio says the effect is extremely popular for creating large swelling chords and surf-style sounds, and that it offers classic tremolo character while remaining simple to operate. If you want the pulsing volume swell associated with surf music, that is exactly the use the maker highlights.
Sources (2)
- TREMBLE-Compact Tremolo Pedal-TONE CITY ▏Analog Pedals & Power supplies, Tone City Audio, 2026
- TREMBLE-Compact Tremolo Pedal-桂林华声乐器有限公司, Tonecity Audio (桂林华声乐器有限公司), 2026




