The K2 Wilson Pickup consists of two single piezo elements, gathered to a Switchcraft 121 extension jack. This pickup is suitable for all double basses and provides almost the same sound assets as the original K4 Wilson Pickup with 4 elements, such as body and warmth natural sound with no feeding back at any level. Positioned in the bridge 18 mm below the strings in between the E/A and D/G, the sound level can be balanced, by slightly rotating the pickup in its mount. K2 is the cost saving alternative to the K4 without compromising the quality of your sound. Special mounting tools and mounting bracket are included with each set of K2 pickups.
5 year warranty

WILSON SPECIFICATIONS:
The Wilson Pick-up System has quite a few assets to offer:
Available in 1, 2, 3, 4, 5, and 6 element sizes to suit budget and instrument design
It gives a realistic, close to perfect, acoustic sound.
It allows each string to be individually volume adjusted by simply rotating the Pick-up in its mount.
It is accurate and completely linear in all registers.
It has the same effect when played by pizz and arco.
It is connected directly to an amplifier. No pre-amp needed.
It is easily built into the bridge as an active part of the bass itself.
It’s position close to the strings captures the body signal in the sound production.
It has a frequency response of 25Hz to 30 kHz - and even beyond.
Each pickup comes with tools required for fitting
The craftmanship of the Wilson Pickups is uncompromised. Each Pickup is handmade in Denmark and thoroughly tested for mechanical tolerance, insulating resistance and frequency response.