DCR – Short for DC Resistance, is measured in Ohms and is the total resistance of the copper wire wound around a coil form. The length of the coil form, the number of turns and the gauge of wire all affect the DCR reading. DCR is often used as a gauge of output because as the turns increase, so does the output, though magnet type and the coil geometry also influence output. Magnet – We use several different magnet formulations: Alnico 2, Alnico 3, Alnico 4, Alnico 5, Alnico 6, Alnico 8 and Ceramic 5/8. In the case of pickups, the most significant characteristic is the gauss strength, which is a measure of the density of the magnetic field. Of the magnets we use, Alnico 3 has the lowest gauss strength. From there in order of ascending strength you have A2, A4, A5, A6, Ceramic and A8. As the gauss strength goes up, so does the output. The magnets at the lower end of the scale tend to produce a softer attack and a degree of “bloom” to the envelope of the note.
Ceramic magnets should be considered as an individual case because they do not contain any nickel or iron. This has the effect of decreasing the inductance of the pickup and significantly raising the resonant frequency. It is for this reason that many consider ceramic magnets to have a brittle sound, not their gauss strength. Looking at this from another point of view, ceramic magnets can be said to produce increased clarity, better note definition and faster response to picking. Output – The overall output of a passive pickup is influenced by several design factors: number of turns of wire on the coil(s), strength of the magnet, coil geometry and magnetic circuit geometry.The output of an active pickup is influenced by the same factors but is predominantly determined by the design of the onboard preamp.
Capture the true voice of your acoustic guitar with the active Mag Mic (SA-6). The Mag Mic combines a high-quality hum-canceling magnetic Stack pickup with an omni-directional condenser mic that includes volume controls. The magnetic pickup captures the detail and dynamics of your personal playing style while the mic gathers up the natural acoustic resonance and air of your sound as it reverberates inside your guitar. Together they provide crystal-clear acoustic tone that sounds just like your guitar whether you play fingerstyle, with a pick or with percussive and tapping techniques, but at the volume you need.
The Mag Mic can pop in and out of your guitar as required (with the endpin jack supported by a special built-in strain relief loop) or can be permanently installed. Powered by a 9V or 12V battery (with clips included), connect the Mag Mic to your favorite amp, pedal, PA, direct box or console with a standard guitar cable. It fits into guitars with soundholes from 3.75” to 4.2”.