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Fulltone ST-JR Supa-Trem Junior

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$229.00 to $232.00 Price Tier: High-end

5.0 (3)

All time low price

Find out who is using Fulltone ST-JR Supa-Trem Junior

2 community setups

1 wishlisted

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Page last updated Jul 01, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 17, 2026.

Store

Reviews

Price

5.0 (9)

$229.00

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4.9 (20)

$229.00 New

$209.99 Used (Like New)

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4.9 (16)

$252.00 $232.00 $20.00 · All time low

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Average Price: $230

High-end/Boutique

$50

$176+

Price Tier

In the Tremolo Effects Pedals category, Fulltone ST-JR Supa-Trem Junior is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

Price History

Based on price data from 2 merchants for "Fulltone ST-JR Supa-Trem Junior". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Introducing the Fulltone ST-JR Supa-Trem Junior, a compact yet highly versatile tremolo pedal that is sure to elevate your music to new heights. Building upon the success of its predecessor, the Supa-Trem Jr offers a wide range of features, including a boost of up to 15dB, three unique waveforms (square, sine, and warble), and a tap tempo function.

The Supa-Trem Jr stands out with its Fulltone-designed Opto-1 Photocell, offering a whole new level of sonic character. It provides an extensive speed range, from a super slow 10-second cycle to a rapid, heart-pounding 220 bpm.

This pedal isn't just a tremolo though, it doubles as a clean boost. By turning the volume up and the mix down, you get access to up to 15dB of clean gain. The large knobs allow for easy on-the-fly adjustments, and a red LED keeps you informed of the speed at all times, even when the pedal is bypassed.

The Supa-Trem Jr also shines with its robust construction, featuring Fulltone's custom-made brass-shaft pots. These pots are mounted to the interior PCB board using a proprietary "thru-PCB" method, reducing the possibility of pot-related failure and ensuring the longevity of your pedal.

Key Features:

Fulltone-designed Opto-1 Photocell for a rich and distinctive sonic character
Tap tempo footswitch and external control input for precise rhythm syncing
Square, sine, and warble waveforms for a wide array of creative possibilities
Functions as a clean boost, offering an additional layer of sonic versatility
Speed range from an ultra-slow 10-second cycle to an ultra-fast 220 bpm
True bypass to maintain signal purity when bypassed
Robust construction featuring Fulltone's custom-made brass-shaft pots, ensuring durability and smooth operation.

Product specs

Pedal Type	Optical Tremolo
Analog/Digital	Analog
Effects	Sine, Square, Warble
Inputs	1 x 1/4"
Outputs	1 x 1/4"
Other I/O	1 x 1/4" (external tap)
Bypass Switching	True Bypass
Features	Tap Tempo, internal Optocoupler Trimmer
Power Source	9-18V DC 50mA power supply required (sold separately)
Power Usage	30mA
Batteries	1 x 9V
Height	2.5"
Width	3.9"
Depth	4"

FAQs

What type of tremolo effects does the Fulltone Supa-Trem Jr offer?: The Fulltone Supa-Trem Jr offers Sine, Square, and Warble tremolo effects, providing versatile modulation options for different musical styles.
Does the Fulltone Supa-Trem Jr have a tap tempo feature?: Yes, the Fulltone Supa-Trem Jr includes a tap tempo feature, allowing you to synchronize the tremolo speed with your music in real-time.
Is the Fulltone Supa-Trem Jr suitable for use with a bass guitar?: Yes, the Fulltone Supa-Trem Jr can be used with a bass guitar, offering rich and dynamic tremolo effects that complement the instrument's tonal range.
What power supply does the Fulltone Supa-Trem Jr require?: The Fulltone Supa-Trem Jr requires a 9-18V DC power supply with at least 50mA, which is sold separately. It can also run on a 9V battery.
What is the bypass type of the Fulltone Supa-Trem Jr?: The Fulltone Supa-Trem Jr features true bypass switching, ensuring your signal remains unaffected when the pedal is disengaged.