Outstanding Value in a Small-diaphragm Condenser Stereo Pair The Golden Age Project FC 4 ST is an affordable stereo pair of small-capsule true-condenser microphones with discrete, transformerless Class A electronics. The 20mm gold-sputtered diaphragm exhibits a cardioid polar pattern and high sensitivity. The sonic characteristics and predictable behavior of the FC 4 are ideal for many recording and live applications. Golden Age precision-matches these mics to within impressively tight tolerances, so you can be assured of accurate tracking when you use them for stereo capture in XY, A-B, or ORTF configurations.A basic necessity for recording The small-diaphragm condenser microphone is a basic necessity for recording, able to faithfully capture the fast transients of acoustic guitar, piano, and cymbals; the nuance and immediacy of orchestral strings and percussion; the complexity of a clean electric guitar; or the raw power of an overdriven amp. The FC 4 excels on all these sources