Neumann KMR 81I, Short shotgun (9 in) with twist pack case and WS 81

Neumann KMR 81I, Short shotgun (9 in) with twist pack case and WS 81

The nickel color Neumann KMR 81I is a shotgun microphone that ues a combination of a pressure gradient and an interference tube. If the wavelength of the frequency is longer thatn the tube length, the microphone works as a pressure gradient transducer.  At higher frequencies the Neumann KMR 81I operates as an interference transducer for lateral sound. Off axis sound source are picked up with reduced level, but without coloration. In addition, the Neumann KMR 81I-MT microphone is well suited to record individual instruments of an orchestra. The pickup areas of several shotgun microphones may even overlap as, for example, during recordings on a large stage, without causing any problem.

A PROBLEM SOLVER WITH A TOUCH OF CLASS

The KMR 81 i is a shotgun microphone with a high directivity for situations that require the microphone to be kept at a distance from the source. This is often the case in electronic news gathering (ENG) and film dialogue recording, where the microphone must remain invisible. The KMR 81 i can also be used to obtain a clear and focused sound in noisy environments.

Technically speaking, the KMR 81 i combines a pressure gradient condenser capsule with a medium-length interference tube to achieve a narrow acceptance angle of 90˚ and excellent rejection of unwanted sound. Unlike many other shotgun microphones, the Neumann KMR 81 i’s lobe shaped pickup pattern is frequency-independent. In other words, off-axis sound is picked up at reduced level but without unwanted coloration. This makes it easy to correct a misaligned microphone in postproduction.

Compared to other shotgun microphones, the Neumann KMR 81 i offers a more natural sound image. Its frequency response is highly linear up to 2 kHz while a broad treble lift compensates for high frequency losses that occur when recording at greater distances. The KMR 81 i offers very low self-noise of only 12 dB-A and a high sensitivity of 18 mV/Pa, which can be reduced by 10 dB to protect the microphone input from overload. The KMR 81 i can handle high SPLs of up to 128 dB without audible distortion (138 dB SPL with the preattenuation switch engaged). A second switch activates a 200 Hz low cut to compensate for the proximity effect when the KMR 81 i is use at short distances.

Neumann KMR 81I Main Features

• High directivity with 90° recording angle
• Excellent rejection of unwanted sound
• Natural sound without off-axis coloration
• Low cut and pad switches
• Lightweight (145 g)
• Low power consumption
• Shotgun microphone for medium distances
• Lobe shaped pattern with 90° pickup angle
• High directivity without off-axis coloration