I’ve always felt that the Herbert—or any Diezel, really—doesn’t need to be boosted to sound great. But out of curiosity, I went the typical route and tried the usual suspects: Ibanez TS9, TS808, and Boss OD-style pedals. I genuinely hated the result. With the Herbert, those kinds of boosts just make it sound congested and cheap to my ears.
That said, I’ve had a lot of luck with the Precision Drive. While it’s technically in the Tube Screamer family, it can be dialed in to sound much more transparent. With the volume and attack maxed, treble at 8–9, and gain at 7–8, it acts more like a high-pass filter—tightening the low end without coloring the core tone.
I’ve also had great results with the RC Booster and Klon-style pedals, specifically the J. Rockett Archer in my case.
The Archer combined with Herbert’s Channel 2+ can be dialed to sound very close to Channel 3, just with a bit more cut and a little less thickness. This gives you two shades of lead tone: smooth, violin-like solos on CH3, or a more aggressive, cutting version on CH2+ with the Archer. Same amount of gain—just different EQ and feel.
The same goes for CH2– with the Klon—it behaves much like CH2+, but even more cutting and focused.
The RC Booster is fantastic, especially with Strats on the clean or crunch channels. It boosts both the lows and highs, so your Strat sounds fatter and more sparkly—more Stratty, really. It also works great in high-gain settings as a transparent “thickener.” It slightly boosts the top and bottom while trimming some mids, making the amp feel a bit slower, thicker, and more old-school. In some ways, it even makes the Herbert feel a bit more VH4-esque.
90% of the time I use Herbert on its own, but with these three pedals, I can tweak the amp in any direction I want:
Precision Drive – as a transparent tightener
RC Booster – as a thickener
Archer – as an additional, slightly tweaked channel of Herbert