EarthQuaker Devices ZEQD‑Pre Tube Preamp — All‑Analog Tube Preamp & Tone Shaping Pedal
Classic Tube Amp Warmth in a Pedal
The ZEQD‑Pre Tube Preamp is a collaboration between EarthQuaker Devices and Dr. Z Amplification, delivering authentic analog tube preamp tone in a compact stompbox. Built around the EF86 pentode tube—the same tube that gives many Dr. Z amps their signature high‑fidelity character—ZEQD‑Pre brings rich harmonic warmth, dynamic touch sensitivity, and full‑range clarity to your signal chain without any digital processing.
Designed to live at the end of your signal chain, this all‑analog solution enhances amplifiers, modeling rigs, and direct‑to‑board setups with organic tube response and versatile tone shaping.
All‑Analog, No Compromises — No Digital Artifacts
The ZEQD‑Pre is a pure analog preamp with no menus, firmware, or digital artifacts:
This keeps your tone true, natural, and dynamic, preserving the nuance of your instrument while adding tube warmth and presence.
Passive 3‑Band EQ for Fine‑Tuned Tone
Shape your sound with a classic passive three‑band EQ:
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Bass: 20 Hz–400 Hz — control low‑end warmth and weight
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Middle: 400 Hz–2 kHz — sculpt body and punch
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Treble: (implicit in EQ) for clarity and sparkle
The EQ lets you fine‑tune your amp’s voice, add harmonic overdrive, or breathe fresh life into a modeling setup. It’s simple yet powerful tone control that reacts musically to your playing dynamics.
Built‑In Analog Cabinet Simulation
ZEQD‑Pre includes a realistic analog cab simulation for quiet practice or direct recording:
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Cab Bypass Switch: Disengage cabinet emulation for pure preamp output — ideal for IR loaders, direct recording, or hybrid rigs
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Provides a natural amp‑and‑speaker feel even at low volume
This makes ZEQD‑Pre perfect for practice, studio sessions, and backline‑free live gigs.
Dual‑Mode Operation — EQ or Full‑Range Boost
Two footswitches give you immediate tonal flexibility:
This gives you two distinct voices at your feet: sculpted, EQ‑shaped tone or full‑spectrum tube boost — immediate, musical, and responsive.
Dynamic Tube‑Driven Sound
By harnessing the EF86 tube’s strengths, ZEQD‑Pre delivers:
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High‑fidelity tone and clarity
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Expressive dynamic response
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Harmonic richness and presence
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EQ that feels natural and responsive
And while it’s designed with guitarists in mind, the ZEQD‑Pre’s broad tonal palette and tube warmth make it equally effective for:
Built in Akron, Ohio, USA
Each ZEQD‑Pre is hand‑assembled by skilled craftsmen in Akron, Ohio, reflecting EarthQuaker Devices’ commitment to quality, performance, and analog excellence.
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