Review: JHS 424 Gain Stage Pedal… Lo-Fi Roots, Serious Bass Utility

Disclaimer: This pedal was kindly provided by JHS for the purpose of this review. However, this does not influence our opinions or the content of our reviews. We strive to provide honest, unbiased, and accurate assessments to ensure that our readers receive truthful and helpful information.

For many of us, the Tascam 424 PortaStudio was our first taste of DIY multitrack recording. Long before everyone had studio-quality rigs in their pockets, the 424 brought analog magic into bedrooms and rehearsal spaces. JHS clearly knows the weight of that nostalgia, and with the 424 Gain Stage, they’ve captured the character of that iconic channel strip and turned it into a pedal that’s surprisingly powerful for bassists.

The Concept

The 424 Gain Stage is a faithful recreation of the full signal path from a vintage 424 MKI channel, complete with its multi-stage gain structure. JHS keeps the layout simple: Volume, Bass, Treble, and two gain controls.

• Gain 1 acts like the Trim of the original tape machine.
  
• Gain 2 mimics the channel fader.
  
• Volume is your output/master.
  

It’s immediately intuitive, even if you’ve never touched a cassette recorder.

Tone & Feel

Here’s where things get fun for bass players. While this pedal is marketed as a lo-fi vibe machine (and it absolutely excels at that), its usefulness goes far beyond “retro grime.”

With Gain 1 low, the 424 works as a warm, harmonically rich preamp. It adds a subtle tape-like bloom to notes, bigger, rounder, more alive, even before you hit any audible grit. Paired with a flatwound-equipped Precision, the pedal felt like a time machine in the best way. The tone sat in the mix beautifully, with that near-breakup texture we associate with old tape heads.

With Gain 1 higher, things get more saturated, landing in a distinctly vintage overdrive/fuzz voice that has character, not chaos. The distortion remains textured and musical, which is why it pairs shockingly well with modern octavers and synth pedals. Want Moog-style subs? Warm tape-crushed synth fuzz? This pedal gets you there fast.

Push Gain 2 past 3 o’clock, and the 424 reveals itself as a gated fuzz monster, tight, aggressive, and full of attitude. Rock players will love this setting. It’s not the modern, mid-loaded distortion you get from boutique drive pedals; it’s something much more old-school and personality-driven.

EQ: Simple But Effective

The Treble control deserves special mention. Because the 424 inherently adds warmth and thickness, the Treble knob works like a clarity dial, cutting through the haze when needed, especially helpful if you’re stacking pedals after it. The Bass knob provides solid low-end sculpting for different rooms or rigs.

Who Is This For?

The 424 Gain Stage isn’t for players chasing modern, scooped, ultra-precise distortion. It’s unapologetically retro. But its usefulness as a preamp, saturator, character DI, and fuzz makes it far more versatile than the “lo-fi” label suggests.

If you’ve drooled over the JHS Colour Box but want something smaller, simpler, and more affordable, with undeniably nostalgic charm, the 424 is an excellent choice. It offers a surprisingly wide palette, all within JHS’s usual high build quality.

Bottom Line

The JHS 424 Gain Stage may have roots in cassette culture, but for bassists, it’s a legitimate tone-shaping tool. Whether you want warm tape-style saturation, sub-friendly synth warmth, or a snarling gated fuzz, this pedal delivers with character to spare.

Available online at Amazon.com