Seymour Duncan spent 50 years building the most popular passive pickups on the planet. The JB humbucker alone has shipped in more guitars than any other aftermarket humbucker in production. In all that time, the company never released a multi-voiced active pickup.
The MortalCoil changes that. Available now in six-string and seven-string configurations, this is Seymour Duncan’s first active humbucker set with switchable voices: three distinct tones accessed through push-pull pots, covering modern metal aggression, classic JB and Jazz character, and articulate single-coil cleans. At $279 for the set, it arrives priced below Fishman’s Fluence Modern humbuckers and lands squarely in their territory.
Three Voices From One Set of Push-Pull Pots
The MortalCoil’s core appeal is its triple-voice architecture. Each voice is selected via included 25k push-pull pots, and each targets a specific tonal territory that players would normally need separate pickups to reach.
Voice 1 (MC1) is the entirely new design, built from scratch for modern metal. Seymour Duncan describes it as delivering “uncompromising tightness, note separation, and cutting presence,” maintaining clarity and balance without fizz or nasal midrange even under extreme gain. The MC1 is what separates this from a simple “active JB.” It targets djent, deathcore, and progressive metal players who need surgical precision in drop tunings, and Seymour Duncan says it maintains that clarity across standard, drop D, and lower tunings without the low end turning to mud.
Voice 2 reproduces the classic JB (bridge) and Jazz (neck) voicings that defined Seymour Duncan’s reputation over the past five decades. The bridge position captures the JB’s signature midrange push and harmonic overtones, while the neck delivers the Jazz model’s warm, balanced clarity. Unlike competing multi-voiced pickups that offer approximated heritage voicings, Seymour Duncan says these are based on the actual JB and Jazz circuits translated into an active platform. For players who grew up on passive Seymour Duncan humbuckers but want noise-free active operation, this voice bridges old and new.
Voice 3 is a single-coil voice with enough output to hold its own in a modern rig. It handles cleans, edge-of-breakup tones, and studio layering without the volume drop that plagues most coil-split options on passive humbuckers. For a pickup system aimed squarely at metal players, this third voice adds genuine versatility for practice, recording, and the clean passages that every metal song eventually needs.
Ceramic Bridge, Alnico 5 Neck, and a Custom Preamp
The bridge pickup uses a ceramic magnet for tight, aggressive response. The neck uses Alnico 5 for warmth and harmonic complexity. That magnet pairing mirrors what many pickup designers do in passive sets, but in an active system the onboard preamp shapes the final output more than the magnet alone.
Seymour Duncan built that preamp around advanced audio op-amps that contribute gain and harmonic detail while keeping distortion extremely low. The precision-wound, high-density copper coils use optimized resistance, which the company says produces faster transient response and stronger pick attack than competing active designs. Seymour Duncan also claims superior battery life, though specific hour counts haven’t been published yet.
Each pickup ships with a single conductor plus a battery wire. Complete sets include four 25k pots: two push-pull for voice selection and two standard for volume and tone. The MortalCoil installs as a drop-in upgrade for guitars already wired for active pickups, so players swapping from EMG or Fishman systems face minimal rewiring. Seymour Duncan recommends buying the complete set rather than mixing a single MortalCoil with other pickups, noting the set “captures the full voicing of what we tried to create” and avoids phase issues.
The seven-string version uses active mount spacing, while the six-string version uses passive mount spacing. Both are available as individual pickups or complete sets.
Fishman Fluence Finally Has a Rival
Since Fishman launched the Fluence line in 2014, multi-voiced active humbuckers have been their unchallenged territory. EMG committed to single-voice designs like the 81/85 set and the Het Set. Seymour Duncan’s own Blackouts active line offered one voice per pickup with no switching. Fishman’s Modern humbucker became the default for metal players who wanted active output with passive dynamics, and artist adoption from Tosin Abasi, Misha Mansoor, and Devin Townsend cemented that dominance.
The MortalCoil is Seymour Duncan’s direct answer: three voices versus Fishman’s two, heritage voicings rooted in the actual JB and Jazz circuits, and a purpose-built MC1 voice that competes for the same tight modern metal tone Fishman’s Modern voice occupies.
At $279 for a complete set, the MortalCoil undercuts Fishman Fluence Modern sets, which typically retail between $290 and $340 depending on configuration. Individual MortalCoil pickups at $169 make a bridge-only swap accessible for players testing the waters before committing to a full set.
Pricing, Configurations, and First Adopters
| Configuration | Price |
|---|---|
| Single pickup (bridge or neck) | $169 |
| Complete set (bridge + neck) | $279 |
Both six-string and seven-string versions are available now through seymourduncan.com and authorized dealers. Black covers only at launch. Sets ship with all pots and wiring needed for complete installation.
Seymour Duncan backs every MortalCoil with a 21-day exchange policy through authorized US dealers. Early adopters include Alyssa Day of Absentia, who performed her track “Inerrata” with the pickups, and Chase Becker of thrash revivalists Warbringer. The emphasis on working metal musicians signals exactly where Seymour Duncan sees this product landing.
Whether the MC1 voice matches or beats Fishman’s Modern voice in a blind test is a debate that will play out on forums and YouTube for years. What matters right now is that the multi-voiced active category finally has a second serious contender, backed by the company that defined aftermarket guitar pickups 50 years ago.