The R-F-T M-216 STEREO is more than just two of our M-16 mkII microphones stacked together. The microphone features a matched pair of 1" dual sided capsules, a NOS (New Old Stock) ECC81 vacuum tube and a matched pair of custom wound BV314 output transformers, allowing the microphone to be used for either "X-Y" or "M/S" mic'ing techniques, or to be used in "dual mono".
The bottom capsule is fixed in cardioid while the top capsule has full pattern selection and the capsule housing can swivel to any angle up to 90º. This enables the engineer to employ an "X/Y" technique by aiming the bottom capsule 45º in one direction and the top 45º to the other.
"M/S" (Mid - Side) is created by moving the top capsule to its full 90º position and setting the pattern selector to the figure of 8 (bi-directional) option.
The "dual mono" mode can lead to all kinds of interesting textures for vocal use. By running the outputs into two different microphone pre-amplifiers the user can now have one capsule set up to sound its best on quiet passages in a vocal and the other for louder passages.
If the user runs about 10db more gain on the microphone pre-amplifier for the capsule that is set up to record quiet passages then both outputs can be recorded separately and blended later, or a compression device can be used on the pre-amplifier that is set up for the quieter passages which will net about 12-15db of gain reduction as the singer gets louder. These two outputs can be summed and the resulting signal will maintain a relatively constant level while being automatically combined for optimal capture the performance.
Each R-F-T M-216 Stereo microphone is supplied with a custom Gotham Audio Cable, wooden mic box, Power Supply with remote polar pattern selector and when registered, a 4-Year fully transferable Limited Warranty.
| Type | Condenser Pressure Gradient |
| Capsule | two TK67 dual sided gold sputtered |
| Frequency Range | 20Hz / 20kHz |
| Polar Pattern | Top Capsule: Omni, Cardioid, Figure 8 with 6 intermediate stages – Bottom Capsule: Fixed Cardioid |
| Sensitivity | 14MV/Pa = -37dB (0dB = 1v/Pa) -10bD |
| Impedance | 200 ohms stock |
| SPL | 125 dB |
| Non Linear Distortion | (for 1% THD @ 1KHz) 125dB |
| Equivalent Noise | 20 dB (A-weighted) |
| Tube Type | 6072a General Electric JAN twin triode |
| Power | Dedicated Power Supply |
| Weight | 32oz (906g) |
| Size | 11 3/4" (298mm) length x 1 3/4" (44.45mm) diameter |
| Extras | MATRIX Power Supply, Shock Mount, Wooden Box |