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I spent several weeks with the Kloppmann Blue Poet Set installed in my ST-style guitar to see if it could deliver both classic Strat sparkle and more aggressive bridge attitude. My aim was to cover clean, breakup and high-gain material and to test how the set balanced across all five selector positions in real playing situations.

First Impressions

The pickups arrived feeling meticulous and boutique - the covers, cloth-waxed leads and included hardware immediately telegraphed a hand-built product rather than a mass-market set. Plugging in for the first run-through, I was struck by how the bridge pickup has an almost P90-like fullness but retains single-coil clarity, while the neck and middle positions stayed open and articulate even when I pushed the amp harder.

Build Quality & Design

The Blue Poet feels properly hand-crafted - the windings are even, the cloth wire is flexible and the set ships with mounting screws, tubing and a tone capacitor so you can complete a straightforward install without missing parts. Kloppmann offers polepiece aging options and RWRP for the middle pickup, and the cosmetic options (cream, pearl white, black) let you match the set to most vintage or modern builds. The fit and finish are consistent with a German boutique manufacturer - snug covers, tidy wax potting and no rattles or loose parts.

Installation & Usability

Installation was typical for a three-pickup Strat-style swap - cloth-waxed leads meant a careful unshielded routing and I used 250k pots for the tone/volume stack as recommended. If you are comfortable with basic soldering it is straightforward, but I would budget a little time to set string heights and intonation after mounting because the bridge pickup sits a touch fuller and benefits from a modest height adjustment. The set is available in right- and left-handed versions and with or without RWRP middle wiring which simplifies quieting single-coil hum in split positions.

Sound & Real-World Experience

What sold me on the Blue Poet is the tonal personality across different playing contexts. Clean tones show a crystalline top end and a warm midrange - the neck pickup lends itself to singing, glassy cleans that sit well in a mix without getting woolly. The middle pickup offers that classic pearly shimmer in 2 and 4 positions and becomes a full mid-forward single pickup when used alone. The bridge is the standout - it can chime sweetly at low gain but also snarls into a rich, harmonically complex crunch and even takes pedaled high-gain without sounding thin. I used it through a clean-to-crunch amp, a driven Vox-style setup and a higher-gain head, and in each case the set maintained note definition and balanced string-to-string voicing.

The Trade-Offs

There are a couple of compromises to be honest - this is a boutique-priced set, so expect premium cost for a comparatively small tonal step up over some high-end mass-produced options. Also, while the bridge has wonderful heft, players after a very glassy, ultra-low-output vintage Strat vibe might find it a touch fuller than expected - you can adjust pole height but the voiced character is deliberate. Finally, if you want noiseless operation in all positions you will need the RWRP middle option and careful shielding; the set is not inherently hum-free in all configurations.

Final Verdict

The Kloppmann Blue Poet Set is an excellent choice for players who want that classic Strat tonal palette but with a meatier, more aggressive bridge voice ready for modern rock or expressive blues lead work. It is boutique in price and feel, but the consistent balance across positions, the hand-wound character and the ability to go from glassy cleans to saturated lead without losing clarity make it a compelling upgrade for serious Strat players or anyone considering an SSS set that behaves like a hybrid between vintage single-coil and P90 energy.

I spent several weeks swapping a set of STK-S4 Classic Stack Plus pickups into a Strat project to see whether Seymour Duncan could truly keep the vintage single-coil chime while eliminating hum. I came from using vintage-voiced single coils and modern noiseless designs, so I wanted to judge the STK-S4 on authenticity of tone, how “Stratty” it felt under the fingers, and how it behaved in split/mixed pickup combinations.

First Impressions

The set arrived in typical Seymour Duncan packaging and the black covers looked clean and low-profile against my pickguard, which I appreciated because they don't scream "aftermarket". Out of the box I noted the flex of the 3-conductor lead and the tidy wax potting job - small things, but they signaled the attention to detail I expect from Duncan. Plugged in for the first clean tests, the hum that usually lives around single-coil Strat necks was gone - the pickups were audibly quiet even with the amp set up to pick up line-noise.

Design & Features

Physically, the STK-S4s are built like a classic Strat single coil with a slightly taller profile than vintage units - they fit most modern Strat routs without drama. Each pickup uses Alnico V rod magnets and a Stack Plus two-coil topology - a traditional top coil that reads the strings, and a bottom coil engineered to cancel hum by injecting countering noise into the circuit. The units come with a splittable 3-conductor cable for true single-coil wiring when you want it and are wax-potted to prevent microphonic squeal. The middle pickup in a full set is wound RW/RP so you still get hum-cancelled combinations in positions 2 and 4 when splitting is used.

Installation & Wiring

Installation was straightforward for anyone comfortable with soldering - the 3-conductor lead gives all the wiring options I needed and the pickup height required only minor adjustment to balance string-to-string output. Because the STK-S4 set is built to match across neck, middle and bridge we avoided the typical volume jumps you sometimes get when mixing different models, and the bridge is wound slightly hotter for position balance. If you plan to use the coil-split feature regularly, take a few minutes during the install to set pot and pickup heights for each position since the character changes noticeably when split.

Playability & Usability

The pickups themselves didn’t change feel under my fretting hand - string articulation remained immediate, and dynamic response to attack was natural enough that I forgot about the electronics and simply played. On cleans the STK-S4 delivers the glassy bell and scooped mid-voice I associate with vintage Strats, which made it my go-to for chiming arpeggios and single-note funk lines. Under moderate overdrive the pickups retain clarity and separation; they break up musically rather than turning into a mushy fuzz—which is exactly what I want when I need Strat grit without sacrificing definition.

Sound & Real-World Experience

In rehearsals and small gigs I used the STK-S4 set through a clean Fender-style amp and a driven tube combo. With the selector in neck or bridge the tone was classic Strat - bell-like highs and an open top-end. The middle and blended positions held up well in band mixes; the set’s balance meant single-note parts sat in the mix without fighting the bass or cymbals. Coil-split really does give you that traditional single-coil snap, and when I ran the middle pickup RW/RP in combinations the hum stayed absent even with pedals and stage lighting hum present. The only time I missed raw single-coil character was when I pushed for very glassy, ultra-responsive single-coil harmonics at very low volumes - the Stack topology smooths the extreme top-end a touch compared to an unshielded vintage pickup, but for most players that’s a desirable, usable tweak rather than a flaw.

The Trade-Offs

If you obsess over absolutely exact vintage single-coil nuance at whisper-volume harmonic content, a genuine scatter-wound vintage single will still be a hair more responsive and slightly airier on the very highest overtones. Also, if you plan to mod your wiring heavily the Stack's slightly different internal geometry means perceived tone shifts when compared side-by-side with plain single coils. Finally, installation in heavily routed or vintage neck-pocket guitars should be measured ahead of time - the Stack Plus height is fractionally taller than some vintage pickups and needs a millimeter of planning for aesthetics and setup.

Final Verdict

Overall I found the STK-S4 Black Pickup Set to be an excellent compromise: it gives the classic Strat sparkle and chime I look for but removes the 60-cycle hum that can complicate stage and pedalboard setups. For players who want genuine Strat personality without dealing with noise - especially those gigging with pedals or in less-than-perfect electrical environments - this set is a very practical, sonically faithful choice. I recommend the STK-S4 set to anyone after a vintage-voiced, noiseless upgrade that stays true to the Strat voice while offering the flexibility of coil-splitting and quiet performance.