MusicRadar Verdict
Vintage-style treble boost to excite your amp into action.
Pros
- +
Germanium transistor. T.M.F. dial offers useful shaping control.
Cons
- -
Narrow in application.
MusicRadar's got your back Our team of expert musicians and producers spends hours testing products to help you choose the best music-making gear for you. Find out more about how we test.
The GuitarSystems 'Junior' range comprises smaller, less fully featured versions of the Dutch company's 'Standard' pedals, which can be adjusted for use in setups with active input signals, such as guitars with EMG pickups.
"The TrebleTool Junior is a single Germanium transistor-based treble boost in the style of the classic Dallas Rangemaster"
The TrebleTool Junior is a single Germanium transistor-based treble boost in the style of the classic Dallas Rangemaster, designed to add edge to dark-sounding British amps in the 1960s and used by Brian May, Rory Gallagher and Tony Iommi.
Three knobs control the action - you can turn up the gain, adjust the treble with the tone knob and alter the signal's low-frequency content with the TMF (Treble Mid Full) knob, common to all of the firm's Junior range pedals. Fully clockwise, you get the full frequency range, and winding it back reduces bass - useful for dialling in the amount of low-end for specific guitars.
The TrebleTool will kick your amp up a gear, but it's more of a specialised tool than a general booster.
“If you messed something up on a production, admit it, fix it, and move on”: 8 cost-free tips to improve as a producer in 2025
"I switched to a Stratocaster - I got a really good deal in the middle of the night for $120 - and then in 1972, Lowell George showed me his MXR compressor pedal”: Bonnie Raitt on how she developed her famous slide guitar style
“The melodies work so well in this CGDGAD tuning. I’ve absolutely fallen in love with this arrangement”: Magic Mike Dawes is at it again – he’s turned a Sleep Token track into a work of solo acoustic guitar genius
