DPA BLM4060 User Manual

Page 1
User’s Manual
BLM4060
Boundary Layer Microphone
Page 2
Page 3
BLM4060 Boundary Layer Microphone
With its elegant look and excellent performance, the BLM4060 Boundary Layer Microphone is the perfect microphone in boardrooms, conference facilities, court­rooms, teleconferencing and other places for audio reinforcement or recording. This microphone is particularly excellent for pick-up of the voice.
The BLM4060 is designed to work under optimum conditions when placed on a table top, but it also performs well on any other hard, flat surface.
The advantages of this microphone are the ease of placement in combination with the high sensitivity and a wide dynamic range.
Page 4
Design
The microphone element is a pre-polarized omnidirectional miniature condenser microphone with a 5.4 mm (0.2 in) vertical diaphragm specially designed for maximum performance. The microphone body consists of a center rubber disc that holds the microphone element mounted in an elegant stainless steel base.
The 3 m (10 ft) cable provided with this microphone is slim and strong and ter­minated on both ends with a MicroDot connector.
The microphone’s size taken into consideration, DPA has obtained an outstanding noise floor of 23 dB(A) re. 20 µPa and an impressive sensitivity of 20 mV/Pa. If powered correctly, the microphone will be able to handle sound pressure levels up to 134 dB SPL before clipping occurs.
A wide range of connection adapters and power supplies makes it possible to use the BLM4060 with any microphone input.
Page 5
Page 6
How to connect the cable
Take the microphone in one hand and the microphone cable in the other. Hold the microphone in a horizontal position keeping the topside up. The connectors are as­sembled by leading the male part into its female counterpart.
Female connector on the micro­phone body.
The MicroDot connector is as­sembled from the topside of the microphone.
Page 7
The cable is connected to the mi­crophone by turning the lock cap clockwise.
Make sure the thread is firmly tightened.
The MicroDot lock cap is turned clockwise and tightened firmly to the female con­nector.
Page 8
How it works
The BLM4060 Boundary Layer Microphone is a transducer that should always be placed on a surface that reflects sound. By doing this you will benefit from the special characteristics of the sound field found here: a 6 dB gain of direct sound and only 3 dB gain of the diffuse sound. Hence, the sound captured has both a greater clarity and intelligibility compared to sound captured above the surface.
How to use it
The microphone can be placed on any surface that reflects sound, i.e. tables, speaker podi­ums, etc. Even if a table is covered with a cloth, the BLM4060 will work due to the shape
and size of the disc.
Page 9
The microphone has been designed to secure high frequency clarity and speech intelligibility under most conditions.
The low frequency response is to some extent dependant on the area of the boundary. However, for speech pick-up even small areas like podiums are adequate.
The microphone can be placed in essentially any position on the surface, even close to the edge. However, try to avoid a placement that may receive reflections from vertical faces as this may cause coloration of the sound (comb-filtering).
For tables longer than 6 m (20 ft), it is recommended to use more than one BLM4060.
Page 10
Specifications
Directional characteristics
Omnidirectional, hemisphere
Principle of operation
Pressure
Cartridge type
Pre-polarized condenser element
Frequency range, ± 2 dB
20 Hz – 14 kHz
(with a 7 dB soft boost at 8 KHz)
Sensitivity, nominal ± 3 dB at 1 kHz
20 mV/Pa -34 dB re. 1 V/Pa
Equivalent noise level, A-weighted
Typ. 23 dB(A) re. 20 µPa (max. 26 dB(A))
Equivalent noise level ITU-R BS.468-4
Typ. 35 dB (max. 38 dB)
S/N ratio, (A-weighted) re. 1 kHz at Pa (94 dB SPL)
71 dB(A)
Total Harmonic Distortion (THD)
<1% up to123 dB SPL peak
<1% up to 120 dB SPL RMS sine
Dynamic range
Typ. 100 dB
Max. SPL, peak before clipping
134 dB
Output impedance
From MicroDot: 30 – 40 ohm
From DAD6001: 100 ohm
Cable drive capability
Up to 300 m (984 ft)
Power supply
For wireless systems: Min. 5 V – max. 50 V through
DPA adapter
With DAD6001-BC/DAD6024/DAD4099:
48 V phantom power ±4 V for full performance
Page 11
Connector
MicroDot/XLR 3-pin
Finish
Black rubber disc mounted in stainless steel base
Dimensions
Diameter: 100 mm (4 in)
Height: 12 mm (0.5 in)
Weight: 240 g (8.5 oz) excl. cable
Cable
Cable length: 3 m (10 ft)
Cable diameter: 1.6 mm (0.06 in)
Cable color: Black
Polarity
Positively increasing sound pressure produces
positive going voltage on MicroDot pin/pin2 on
XLR connector
Operating temperature range
-10 to 45° C (+14 to 113° F)
14
On-Axis Frequency Response of BLM4060
Page 12
Accessories:
Adapters:
DAD6001 MicroDot to 3-pin XLR plug (included)
Cables for BLM4060:
DAO6015 Cable for BLM4060, 3 m (10 ft) (included) DAO6016 Cable for BLM4060, 10 m (32.8 ft) DAO6017 Cable for BLM4060, 20 m (65.6 ft)
Miniature Power Supplies:
MPS6001 1-channel, 3-pin XLR MPS6010 2-channel, 3-pin XLR MPS6020 2-channel, phono MPS6030 2-channel, mini-jack MPS6040 2-channel, ¼ in. jack
Amplifier:
MMA6000 Miniature Microphone Amplifier
Page 13
Maintenance: A dry cloth may be used to clean the surface of the microphone. IMPORTANT: No cleaning agent should ever be used as fluids may da­mage the microphone.
ENVIRONMENTAL POLICY
This product is comprised by the Waste (WEEE) directive and should not be thrown in the garbage bin when obsolete. Instead, return it to your local DPA representative (or DPA Microphones A/S directly) who will dispose of the product
in accordance with the current environmental standards.
Page 14
Service and repair
Products from DPA Microphones are extremely stable and there should not be any significant change in the specifications with time and use. If, however, you are not to­tally satisfied with the characteristics exhibited by these products, contact your nearest DPA Microphones representative for further details of service and the repair facilities that are available.
Please contact DPA Microphones for your nearest representative on:
Head Office:
Tel. +45 48 14 28 28 Fax: +45 48 14 27 00
Us Sales Office:
Tel. +1 303 823 8878 Fax: +1 303 823 5830
You can also get in touch with DPA Microphones at:
www.dpamicrophones.com or info@dpamicrophones.com
Page 15
Warranty
All products from DPA Microphones are covered by a two-year limited warranty on both mechanical functionality and documented specifica­tions as long as the items are not mistreated, abused or modified in any way. In case of a warranty claim your invoice is your warranty registration.
CE-Marking
The CE-mark guarantees that the product conforms to relevant Direc­tives approved by the European Commission, specifically the EMC Directive: 2004/108/EU.
© 2010. DPA Microphones A/S
Product features and specifications are subject to change without notice.
Page 16
DPIBLM4060-2
Head Office
DPA Microphones A/S
Gydevang 42-44
DK-3450 Alleroed, Denmark
Tel: +45 4814 2828
Fax: +45 4814 2700
info@dpamicrophones.com
www.dpamicrophones.com
US Sales Office
DPA Microphones, Inc.
2432 N. Main St., Suite 200
Longmont, CO 80501, USA
Tel: +1 303 485 1025
Fax: +1 303 485 6470
info-usa@dpamicrophones.com
www.dpamicrophones.com
Loading...