This is a complete Surround Kit with five carefully factory-matched omnidirectional microphones. Even though the standard tolerances on the 4006A Omnidirectional Microphones are extremely low, the surround match is even closer. The specially selected 4006As are matched within ±0.5 dB on both frequency response and sensitivity from mean of set.
The 5006A Surround Kit has five carefully factory-matched 4006A Omnidirectional Microphones. Even though the standard tolerances on the 4006A Omnidirectional Microphones are extremely low, the surround match is even closer − within ±0.5 dB.