Noble Screamer Overdrive and Boost

The Keeley Noble Screamer packs four distinct overdrive and boost flavors into one compact box, giving you everything from classic mid-pushed grind to wide-open, amp-like roar. It feels immediately familiar under your feet, but the moment you flip those two mini switches you’re in fresh territory that begs you to keep playing.

Features

This 4-in-1 overdrive and boost is built around two all-new amp-like hybrid tones plus two well-known drive voices, all accessed with a simple three-knob layout. One switch selects between a broad “OD” voice and a “TS” voice, while the other reshapes the tone circuit itself, so you can mix and match clipping and EQ to create your own hybrid sounds. It’s like having multiple classic drives and a couple of new ones all hiding in a single enclosure, without the menu-diving or digital feel.

Everything stays fully analog, so the response is immediate and touch-sensitive, with an all-analog signal path that reacts like a cranked amp when you roll your guitar’s volume up or down. On top of that, you can switch between buffered and true bypass on the fly using the footswitch, choosing either Keeley’s Vitamin K infused buffer for strong, clear signal and silent switching, or a straight-into-the-amp style true bypass path. The new proprietary enclosure is manufactured by RKFX in the USA and houses meticulously built circuit boards and metal construction audio jacks, designed and made in Oklahoma City.

Tone

In OD mode with hard diode clipping, the Noble Screamer dishes out an edgier, more aggressive drive that feels amp-like and punchy, perfect for pushing chords into a gritty, harmonically rich crunch. Flip to the TS clipping position and you’re in smooth, soft-clipping territory, like a tube amp just leaning into overdrive, ideal for singing leads and dirty boosts that stay articulate.

The tone section is equally powerful. With the Tone switch in the OD position, you get a broad-spectrum control that can run from flat EQ to added treble and bass, letting your sound breathe with added low-end push and airy top. Move it to the TS position and it becomes a focused low-pass filter that rolls off highs, tightening the top and giving you that familiar, vocal mid-forward profile that slices through a mix without getting harsh. From slight breakup to fuzz-adjacent saturation, it stays tuneful and responsive, rewarding how hard you dig in.

Specifications

• Brand: Keeley
• Model: NOBLE-SCREAMER
• Category: Distortion, Drive, Boost & Fuzz
• Type: Overdrive and boost effect pedal
• 4-in-1 overdrive and boost
• Four overdrive and boost sounds, including two new amp-like hybrid tones
• Two drive circuit styles: OD and TS
• Tone control modes:
  • OD position: broad spectrum tone control (flat EQ to boosted treble and bass)
  • TS position: low-pass filter that rolls off high frequencies
• Diode clipping options:
  • OD position: hard diode clipping for edgier, more aggressive tones
  • TS position: soft diode clipping, similar to a softly overdriven tube amplifier
• All-analog signal path
• Buffered or true bypass selectable on the fly
• Silent buffered bypass using Keeley’s Vitamin K infused buffer
• True bypass selectable by pressing and holding the footswitch for two seconds (LED flashes twice)
• Buffered bypass selectable by pressing and holding the footswitch for two seconds (LED flashes three times)
• Truly silent switching
• Simple three-knob overdrive layout
• All new proprietary case shape
• Case manufactured by RKFX in the USA
• Designed, engineered, and manufactured in Oklahoma City, USA
• Newly fabricated aluminum enclosure
• Metal construction audio jacks