Please note - this upgrade kit is designed to be used with a K&K Pure Mini for a great dual-source pickup system. This kit does not include the Pure Mini element, which must be purchased separately.

The K&K Sound Double Helix is a premium passive hum-cancelling dual-coil soundhole pickup for steel-string acoustic guitar - a genuinely sophisticated amplification solution that delivers K&K's signature natural acoustic quality with the practical versatility of two distinct tonal voices accessible via a simple switch. Designed to work both as a standalone pickup and in combination with K&K's Pure Pickup system, the Double Helix brings the kind of tonal flexibility to the acoustic-electric player that has long been the exclusive domain of magnetic electric guitar pickups, all achieved in a completely passive, battery-free design that requires no internal electronics or permanent modification to the guitar.

The Double Helix's defining feature is its unique tone switch offering two settings - GLOSS, a fine, bright, and naturally acoustic voice with a shimmering high-end character and beautiful warm midrange ideal for fingerpicking and lighter strumming contexts; and STEAM, a fuller, louder, and more substantial voice with superb feedback rejection suited to driving acoustic tone to the front of a mix in demanding live performance settings. A phase switch allows the Double Helix to harmonise perfectly with any existing pickup already installed in the guitar, making it an ideal upgrade partner for the K&K Pure Pickup system. Both settings are fully hum-cancelling. An external endpin adapter is available separately for players who prefer not to install a new endpin jack. Ideal for performing singer-songwriters, acoustic session players, and any guitarist who wants a top-of-the-line passive soundhole pickup with genuine tonal versatility and K&K's celebrated natural acoustic character.

Features

• Dual-coil hum-cancelling design delivers K&K's signature natural, transparent acoustic tone free from the hum and interference that affects single-coil soundhole pickups - in a completely passive, battery-free design with no internal electronics required.
• GLOSS tone setting provides a fine, bright, and naturally acoustic voice with shimmering high-end character and beautiful warm midrange - ideal for fingerpicking, light strumming, and acoustic playing contexts where natural tone is paramount.
• STEAM tone setting provides a fuller, louder, and more substantial voice with superb feedback rejection - ideal for driving the guitar's tone to the front of a live mix or competing in louder ensemble contexts.
• Phase switch allows the Double Helix to harmonise perfectly with any existing pickup already installed in the guitar, making it an ideal and sonically cohesive upgrade partner for the K&K Pure Pickup system.
• Fully passive design requires no battery and no internal electronics - a plug-and-play amplification solution that delivers top-of-the-line performance without any permanent alteration to the guitar.

• Type: Hum-cancelling dual-coil soundhole pickup
• Compatible instruments: Steel-string acoustic guitar
• Tone settings: GLOSS (bright, natural acoustic), STEAM (full, loud, feedback-resistant)
• Phase switch: Yes
• Hum-cancelling: Yes (both settings)
• Power: Passive - no battery required
• Installation: Soundhole-mounted
• Endpin jack: External endpin adapter available separately
• Compatible with: K&K Pure Pickup (as upgrade/complement)
• Manufacturer: K&K Sound Systems Inc (handcrafted, since 1984)