EMG

The first EMG pickups were created in 1976 and today, as then, the main goal of these pickups is to reproduce the sound of the instrument as realistic as possible. All EMG pickups meet what musicians demand in the real world: versatility, reliability, responsiveness and great sound.
An active pickup is one that uses electronics to improve your sound and the overall performance of your instrument. EMG pickups utilize an internal preamp, which makes our pickups louder, more responsive, and reduces unwanted noise.
The greatest advantage to using EMG pickups is the reduction in noise. No longer will bad power, dimming house lights, neon signs... cause your guitar to buzz incessantly. You can use an extra long cable runs, wireless systems, pedals... all without the loss of treble or your overall tone. You’ll get your sound consistently every time.
There is no other pickup built as well as an EMG. The coils are precision wound, matched both resistively and inductively, and finally, vacuum sealed. All internal preamplifiers are Surface Mount Technology (SMT) for quality and reliability. Each pickup is tested for audio quality and reliability before encapsulation and again before shipment.
EMG is perhaps the most famous active pickup in the world. They have been used by musicians such as Kirk Hammett, James Hetfield (Metallica), Kerry King (Slayer), Max Cavalera (Soulfly / Sepultura) and David Gilmore (Pink Floyd).