The 4038's frequency response is flat, with a range of approximately 30-15,000 Hz. The attenuation of high frequencies reduces sibilance on vocals, but also reduces detail. The microphone uses a bi-directional polar pattern. The microphone is connected using a Western Electric jack connector designated 4069, which adapts the microphone's 3-pin output to a standard XLR connector.
Recording Hacks, January 2000
"Well, even though the price is $1050 or so, it was very hard to pack it back up and send away when my trial time was up. It made electric guitar amps sound amazing. As a behind-the-drummer’s-head room-mic it was full range yet crunchy — great for some garage-y Cadallaca songs we were tracking.
Sorry, no product details were found...