All-analog, Tube-fueled Tone for Your Pedalboard
A game-changing joint effort between EarthQuaker Devices and Dr. Z Amplification, the ZEQD-Pre injects your guitar rig with a healthy dose of tube-flavored character. Place this all-analog preamp pedal at the end of your signal chain, and you’ll revel in the harmonic-rich warmth and dynamic response you’d expect from a cylinder of glowing-hot glass. The ZEQD-Pre’s robust, passive 3-band EQ is just what the doctor ordered for fine-tuned tone shaping, pushing its preamp into ear-grabbing grit, or breathing new life into your favorite modeling patch. Moreover, this stellar stompbox features a switchable analog cabinet simulation for seamless DI recording and backline-free live performances. You also get a Boost footswitch with a dedicated Level control, delivering a wide-open volume bump that lets your solos soar high above the mix without sacrificing clarity or character. Finally, the ZEQD-Pre includes numerous thoughtful features, including a Ground Lift, Headphone output, and a balanced XLR DI output. Driven by an EF86 pentode — the same tube that fuels Dr. Z’s pristine, hi-fi amplifiers — the EarthQuaker Devices ZEQD-Pre offers a complete, all-analog amplifier system that fits right on your pedalboard.
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Put legendary tube tone at the finish line
Driven by a real-world EF86 pentode, the ZEQD-Pre infuses every note you play with classic tube warmth and an inspiring level of dynamic response. Place this powerhouse at the end of your signal chain, and you’ll be able to shape your sound with a responsive 3-band EQ — dial in rich harmonic overdrive, refine your amp’s voice, or add organic realism to any modeling setup. Need to cut through the mix? It’s no problem for the ZEQD-Pre; simply stomp on the Boost footswitch, and the EQ drops out completely, unleashing a pure, full-range lift with its own dedicated Level control. Thanks to the Boost feature, you’ll have two distinct voices at your command: sculpted tone or wide-open boost. When we ran the ZEQD-Pre through its paces here at Sweetwater, we found it to be immediate, musical, and unmistakably analog.


Have your tone and play it too
The EarthQuaker Devices ZEQD-Pre delivers the authentic feel of a real amp — even during quiet practice — thanks to the built-in analog cabinet simulation. Need extra flexibility? Flip the Cab Bypass switch and send a pure signal to your favorite IR loader or modeling software. This preamp pedal is a streamlined solution for direct recording, backline-free gigs, or complex hybrid setups. With the ZEQD-Pre, you get both straightforward simplicity and authentic tube tone with no menus, no IR loading, and no firmware updates — no digital distractions at all — just pure, organic tone and response in a compact, pedalboard-friendly format.
EarthQuaker Devices ZEQD-Pre Features:
- A tube-driven preamp pedal created in collaboration with Dr. Z Amplification
- Fueled by an EF86 pentode — the same tube that fuels Dr. Z’s pristine, hi-fi amps
- Passive 3-band EQ provides fine-tuned tone shaping and more
- Switchable analog cabinet simulation facilitates seamless DI recording and backline-free live performances
- Boost footswitch with a dedicated Level control delivers a wide-open volume bump
- Ground Lift eliminates unwanted hum and noise
- Headphone output makes quiet, self-contained practice sessions a straightforward affair
- Balanced XLR output negates the need for a separate DI box