Neumann KMR 81i Shotgun Microphone

Neumann KMR 81i Shotgun Microphone

Neumann KMR 81 i Shotgun Microphone

The KMR 81 is a shotgun microphone with a high directivity that remains within the acceptance angle independent of the frequency.

The advantage is that a sound source, for example an actor on stage, will not change its apparent tonal balance when moving within this area. This microphone is also available as a digital version: the KMR 81 D shotgun microphone.

Applications

Shotgun microphones are particularly useful in recording situations where a microphone cannot be positioned within the desired distance of the sound source to produce a sufficiently loud signal level.

Typical applications are film and video recordings, where the microphone should not appear in the picture.

The KMR 81 has been specifically designed for electronic news gathering.

Acoustic features

In principle, Neumann shotgun microphones use a combination of a pressure gradient transducer and an interference tube. If the wavelength of the frequency is longer than the tube length, the microphones work as pressure gradient transducers. At higher frequencies they operate as interference transducers for lateral sound. Off-axis sound sources are picked up with reduced level, but without coloration.

Therefore, the microphones are 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.

The KMR 81 is less sensitive to wind and pop noise when compared to the KM 150 miniature microphone with a similar high directivity. The shotgun microphone features extremely low self noise, good impulse response, and high output level.

Polar patterns

The KMR 81 is a shotgun microphones with a very directional characteristic.

The microphone capsule is positioned inside a housing tube that is acoustically open but has a high flow resistance. The directional pattern of the microphone is lobe shaped. The attenuation of lateral sound is practically independent of the frequency. The KMR 81 has a frequency independent directivity within a pickup angle of 90° for audio signals that determine the tonal balance of the program material.

Filter and attenuation

The microphone has a 10 dB attenuation switch to prevent the input of the following unit from overloading.

A second switch activates a 200 Hz high-pass filter. Toward the lower frequencies the sensitivity of the microphone is attenuated by approximately 15 dB at 50 Hz. The frequency range above 200 Hz is unaffected.

Use on location

The shotgun microphone features very high output capability and a remarkably low self-noise level.

Its low power consumption, light weight, and low sensitivity to wind and handling noise, makes it an ideal tools for news gathering on location.

Small dimensions, together with a balanced center of gravity, make handling easy without any whiplash effect.

However, when on location and during strong wind conditions, we recommend using an additional wind screen (included as standard accessory). The wind screen is made of polyurethane foam and also serves as soft padding of the microphone in its leather carrying case.

For mobile use a handle and an elastic suspension are available.

Acoustical operating principle Interference transducer
Directional pattern Supercardioid/lobe
Frequency range 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm 18 mV/Pa
Rated impedance 150 ohms
Rated load impedance 1 kohms
Equivalent noise level, CCIR1) 23 dB
Equivalent noise level, A-weighted1) 12 dB-A
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) 71 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) 82 dB
Maximum SPL for THD 0.5%2) 128 dB
Maximum SPL for THD 0.5% with preattenuation2) 138 dB
Maximum output voltage 1.3 dBu
Supply voltage (P48, IEC 61938) 48 V ± 4 V
Current consumption (P48, IEC 61938) 0.8 mA
Matching connector XLR3F
Weight 145 g
Diameter 21 mm
Length 213 mm

Delivery Services

At Pinknoise Systems we like to offer our customers a wide choice of delivery options for their orders, and our prices are affordable and competitive. We also use only the best, most reliable couriers and delivery services to get your equipment where it needs to be - quickly and securely. Please find an outline of our services, prices and timescales below.

Service Timescale Price
UK Mainland Royal Mail Small Parcel 2-4 Days £3.99
UK Offshore Royal Mail 2-4 Days £9.99
UK Standard Courier 2-4 Days £6.49
UK Express Courier Next Day £7.99
International Shipping From 1-8 Days (Full Details) From £15.00

Delivery Times

Delivery times are based on when the packages leaves our premises. Sometimes, due to stock restrictions or a non completed order, delivery may take longer as there is a delay with dispatch. We will always notify customers of any issues and problems via email or telephone. If your order is urgent or details change please do let us know.

For full details, fees, and time schedules, please see our Delivery Information page.

Returns & Refunds

New items: You can return goods you have ordered from us for any reason, at any time within 7 working days of receipt, for a full refund or for an exchange for a different product from our range. The cost of returning goods to us shall be borne by you, the customer, in all circumstances without exception.

Items must be packed suitably and insured for full loss in the event of a delivery problem. Pinknoise Systems will not be responsible for lost or damaged return goods. Lost or damaged goods may effect the level of refund you receive.

Used items: Please note this does not apply to used item unless they are deemed faulty.

For full details of our returns policy, please click here.

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£1,150.00 £1,260.00
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Delivery hours
UK ORDERS: Order soon for delivery on using our express service

Model:  NEU-KMR81I-BL
Part No.:  006962
Manufacturer:  Neumann

Neumann
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(+44) 01453
825 802

International Delivery

International delivery

We ship across Europe and around the world and have a multitude of shipping options available to our international customers during the checkout, including express delivery for urgent orders.

NEXT DAY DELIVERY

We have a next day shipping option available for the UK with our DPD courier service, which features delivery alerts, personal delivery preferences and driver tracking with the DPD mobile app.

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Neumann KMR 81i Shotgun Microphone

£1,150.00
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