Product Details

MSRP $696.95 excl. local VAT
Product ID BLM4060
The d:screet™ BLM4060 Boundary Layer Microphone is ideal for use in boardrooms, conference facilities, courtrooms. It is also a great solution for teleconferencing and other applications where excellent vocal pickup is required.

The d:screet™ BLM4060 Boundary Layer Microphone is a transducer designed to work under optimum conditions when placed on a tabletop, but it also performs well on any other hard, flat surface that reflects sound. The microphone is a pre-polarized omnidirectional miniature condenser microphone with a 5.4 mm (0.2 in) vertical diaphragm. The mic body consists of a central rubber disc that holds the mic element mounted in an elegant stainless steel base. It comes with a 3 m (10 ft) cable.

The d:screet™ BLM4060 Boundary Layer Microphone can be very easily placed in essentially any position on the surface of a table, even close to the edge. Users will benefit from the special characteristics of the surrounding sound field on which the mic is mounted: a 6 dB gain of direct sound and only a 3 dB gain of the diffuse sound. The sound captured has both greater clarity, especially at high frequencies, and speech intelligibility compared to sound captured above the surface.

A wide range of connection adapters and power supplies makes it possible to use the d:screet™ BLM4060 Boundary Layer Microphone with any microphone input. It is delivered with a DAD6001 adapter.

Flexible adapter system

The adapters for wireless systems give you flexible, simple and affordable possibilities. You are no longer bound to one wireless system. As circumstances change, you can just switch your adapter, instead of incurring the cost of a whole new microphone. And when you make the switch, you won't hear any loss or change in sound quality.

microdot adapters overview

The d:fine™, d:screet™ and d:vote™ series of miniature microphones work with all leading wireless mic solutions, such as Lectrosonics, Sennheiser, Shure, Sony, Wisycom, Zaxcom and many more. DPA Microphones’ ingenious adapter system is one of a kind in the industry. It protects your investment in fantastic sound for years to come.

Find the adapter that fits your wireless system.


The product offers the following features
Ideal for use in boardrooms, conference facilities, courtrooms, for teleconferencing
Optimized to boost speech intelligibility
Modular adapter system fits most professional wireless systems


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d:screet™ miniature microphones
CABLE FOR d:screet™ BLM4060, 3 M (10 FT) (DAO6015)



d:screet™ Miniature Microphones BLM4060 BOUNDARY LAYER MICROPHONE

Directional pattern
Omnidirectional, hemisphere
Principle of operation
Cartridge type
Pre-polarized condenser
Frequency range
20 Hz - 20 kHz
Frequency range, ±2 dB
20 Hz - 14 kHz, with 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 1 Pa (94 dB SPL)
71 dB(A)
Total harmonic distortion (THD)
< 1% up to 123 dB SPL peak
Dynamic range
Typ. 100 dB
Max. SPL, peak before clipping
134 dB
Output impedance
From MicroDot: 30 - 40 Ω. From DAD6001: 100 Ω
Cable drive capability
Up to 300 m (984 ft)
Power supply (for full performance)
Min. 5 V to max. 50 V through DPA adapter for wireless systems
or 48 V phantom power ±4 V with DAD6001-BC XLR adapter
MicroDot or XLR 3-pin
Black rubber disc mounted in stainless steel base
240 g (8.5 oz) excl. Cable
Microphone diameter
12 mm (0.47 in)
Microphone length
100 mm (4 in)
Cable length
3 m (10 ft)
Cable color
Cable diameter
1.6 mm (0.06 in)
Positively increasing sound pressure produces positive-going voltage on MicroDot pin/pin 2 on XLR connector
Temperature range
-40°C to 45°C (-40°F to 113°F)
Relative humidity (RH)
Up to 90%