Guitars. In addition to pickups, EMG Inc. also has a line of guitar and bass accessories, mainly for altering equalization settings such as bass/treble and gain boosting, and designed to work with most pickups. These can be found in instruments made by companies such as Schecter, who ship almost all of their basses with EMG equalization circuitry. Pickup product range EMG Inc. has four distinct product ranges; the EMG Standard Series, HZ / SRO Series, SA Series and the EMG X-Series. These pickups are all featured on the official EMG Inc. website and include solderless wiring harnesses. Standard Series The Standard Series consists of all their standard active guitar, bass, and acoustic pickups, including humbucking, single coil, and bass models for 4, 5, and 6 string basses. EMG active pickups (such as the EMG 60, EMG 81, EMG 85, and EMG 89) tend to have much higher output than passive pickups of similar design (such as the EMG HZ) because of the on-board preamplifier. The high output, noise-reduction and responsiveness of EMG active pickups has made them popular with hard rock and heavy metal guitarists because they overdrive the input stage of guitar amplifiers more dramatically than a lower output pickup could. In 2012 EMG introduced a new 57/66 set to replace the outdated EMG 60 and EMG 81 configuration in which the designs were based on the James Hetfield "JH Het Set" to mix high output from a passive pickup with the punch of the active pickups. HZ / SRO Series The HZ / SRO Series is a variety of passive designs of humbucking and single coil pickups, as well as bass models for 4, 5, and 6 string basses. HZ pickups are commonly used in guitar and bass manufacturers as stock pickups. SA Series The SA Series is an active single coil pick up with moderate gain output levels famous among Fender Stratocaster players for extra volume and gain while retaining that classic vintage tone. X-Series The X series is an active product designed to bridge the gulf between passive and active tonalities. They are active but are voiced to sound more organic, with a more rounded signal response like the passives, while retaining the active qualities such as noise reduction and high output. Signature Pickups and Sets EMG has released several signature pickups and sets for various artists, the two longest signature artists being Kerry King ("KFK