The Fender Noiseless™ series is a line of electric guitar pickups made by the Fender Musical Instruments Corporation designed to cancel 60 cycle (Hz) hum noise while retaining the characteristic sound of single coil pickups. Introduced in 1998, these pickups consists of a pair of single coils stacked one on top of the other, compacted so as to match the shape and width space as a traditional Fender single coil guitar pickup, while being only slightly taller. The upper coil is actually the sound source, while the lower coil is responsible for the 60-cycle hum attenuation. Alnico V magnetic bars span from one coil to the other, crossing a soft ferrous steel spacer plate that isolates them, without touching it. The spacer plate has mainly two functions: to isolate the lower coil from the vibrations of the string, making sure that the sound is picked up only from the upper one, and to increase the magnetic flux that passed through both coils, increasing the output of the pickup. This is to be contrasted with the original noise canceling pickup, the humbucker, which is a double-wide, horizontally adjacent pair of single coil pickups with opposing phase. The series includes models for electric guitars and bass guitars. Pre-Fender Noiseless From 1987 to 1998 Fender used Lace Sensor pickups on its Strat Plus model Stratocaster. Lace Sensors are an innovative design of pickups using a unique radiant field barrier system that surrounds both the coil and magnets, eliminating annoying 60 cycle hum. The patented Lace Micro Matrix Combs replace traditional bobbins, yielding a wider tonal range and better string balance than traditional pickups. Lace Sensors were also configured on some Fender models as Dually pickups (two adjacent single coils operating as a quasi-humbucking pickup). Lace Sensor pickups are still available from Lace Music Products with many more variations than offered on Fender guitars. The pickups installed on Strat Plus guitars display “Fender Lace Sensor” on the cover. Later “post-Fender” versions sold by the Lace Music Co. have "Lace Sensor" embossed on the cover. The Gold Lace Sensor model was the pickup of choice for years by Jeff Beck, Eric Clapton, and Buddy Guy on their Signature Series Stratocasters. The Strat Plus Standard uses three Gold Lace pickups, but other varieties of Lace Sensor pickups were use by Fender on different models of the Strat Plus. Vintage Noiseless The Noiseless pickups now referred to