If you work in film scoring or classical recording then you should know what a Decca Tree is. If you don't, here is a brief synopsis. A Decca Tree is a stereo A/B configuration with a third channel acting as a "center fill" microphone that helps create a strong but very even stereo image. This microphone placement technique was pioneered in the early 1950s by engineers from Decca Records for orchestral recording applications (hence the name Decca Tree). In addition to orchestral recording applications, the Decca Tree configuration can be an invaluable component to more contemporary recordings for drum applications and to gain an overall "band in a room" kind of atmosphere to your recording process.
The technique features three omni-directional microphones placed in a reverse "T" configuration, roughly above the head of the conductor. The "left" and "right" are positioned behind the conductor while the "center" microphone hangs in front of the conductor. The most common Decca Tree setup employs 3x 1-meter bars from which the microphones hang in a triangle configuration, though larger and smaller bar sets can be used.
While the most common configuration photographed of this technique employs Neumann M-50 microphones, there were many documented instances where Decca engineers employed Neumann KM-56's and Schoeps M-221b microphones. Hence the Telefunken Elektroakustik ELA M 260 system, utilizing its omni capsules, is absolutely appropriate for this technique.
The Telefunken Elektroakustik Tri-Mono package for the ELA M 260 system consists of 3 ELA M 260 microphones (finished in black), a dedicated power supply with three-channel capability, three elastic shock mounts and a set of three 10-meter Gotham Audio GAC7 tube mic cables with right angle XLR connectors. In order to foster an element of creativity, all three capsule systems (TK60 cardioid, TK61 omni-directional, and TK62 hyper-cardioid) are included in the package.