The 3506A Stereo Kit with 4006A Omnidirectional Microphones from DPA is designed for the crucial capturing of instruments or vocals in recording and live sound reinforcement applications. The kit includes two frequency matched 4006A omnidirectional microphones, two 30mm ball acoustic pressure equalizers, two 40mm ball acoustic pressure equalizers, two 50mm ball acoustic pressure equalizers, two free-field grids, two close-miking grids, two diffuse-field grids, two nose cones, two foam windscreens, two microphone clips, and one stereo boom without holders. The 4006A microphones are matched within ± 0.5 dB on frequency range, sensitivity, and self-noise. A high sensitivity, low noise-floor, and linear frequency response allow for use of the microphone with professional A-B stereo recordings.
Main Benefits
- Modularity – interchangable capsules and preamplifiers
- Up to 120 dB dynamic range
- RF rejection between >60 and >40 dB
- High SPL
- Superior gain before feedback
- The kit includes a frequency and sensitivity matched pair of 4006A omnidirectional microphones
- Linear frequency response, particularly at the high-end
- Clean, neutral sonic character
- Omnidirectional polar pattern
- Can be used for A-B stereo pairs in symphonic concert hall recordings
Description

The wide and versatile d:dicate™ Microphone series is legendary in the high-end recording and film production industry. Delivering clean, accurate sound, the mics in this series are used by professionals, who understand sound and insist on only using the best.
We have collected our award-winning d:dicate™ Recording Microphones in specialized stereo kits that contain the mics and accessories you need to capture fantastic sound no matter what your need. All kits are matched within either ±0.5 dB or ±1 dB depending on the kit you choose.
3506A Stereo Kit with 4006A Omnis
This is a complete stereo kit with two carefully factory-matched phantom powered d:dicate™ 4006A Omnidirectional Condenser Microphones. The kit includes mics, windscreens, boom, holders, clips, and much more.
Even though the standard tolerances on our d:dicate™ series are extremely low, a stereo match is even closer. These specially selected d:dicate™ 4006A Omnidirectional Microphones are matched within ±0.5 dB on both frequency response and sensitivity.
For reference stereo recording, there is no better choice than a d:dicate™ 4006A Omnidirectional Microphone. These omnidirectional condenser microphones are linear and true in character. They come as a hand-matched pair that offers the truest capture of stereo sound available.
The d:dicate™ 4006 Omnidirectional Microphone
The 4006 Omnidirectional Microphone Capsule offers total transparency in any recording situation. It picks up incredible detail and depth of sound. The definition of its high-frequency characteristics across a wide range of instruments is impressive. It offers natural sound, high sensitivity, low noise-floor and linear frequency response from 10 to 20 kHz (±2 dB).
The d:dicate™ 4006A Omnidirectional Microphone is a flexible solution. Engineers, broadcasters and musicians alike can achieve clean, natural and precise sound reproduction. This mic is ideal for A-B stereo pairs for symphonic concert hall recordings. It also excels on vocals, for close-miking all types of instruments and as an outdoor interview microphone.
A selection of accessories is available, including acoustic pressure equalizers, a nose cone and interchangeable protection grids. These accessories can acoustically transform the mic. By changing grids, it is possible to gain several unique frequency responses and directional characteristics from the mic.
Furthermore, these accessories will not produce any phase shift, noise or distortion that would otherwise be introduced by an electrical filter.
Tech Specs
Directional pattern: Omnidirectional
Principle of operation: Pressure
Cartridge type: Pre-polarized condenser
Frequency range: 10 Hz - 20 kHz
Frequency range, ±2 dB: 10 Hz - 20 kHz
Sensitivity, nominal, ±2 dB at 250 Hz: 40 mV/Pa; -28 dB re. 1 V/Pa
Equivalent noise level, A-weighted: Typ. 15 dB(A) re. 20 µPa (max. 17 dB(A))
Equivalent noise level, ITU-R BS.468-4: Typ. 27 dB (max. 29 dB)
S/N ratio (A-weighted), re. 1 kHz at 1 Pa (94 dB SPL): Typ. 79 dB(A)
Total harmonic distortion (THD): < 1% up to 139 dB SPL peak
Dynamic range: Typ. 124 dB
Max. SPL, peak before clipping: 146 dB
Switchable attenuator, filters etc.: 0 dB / -20 dB
Minimum load impedance: 2 kΩ
Cable drive capability: 100 m (328 ft)
Output balance principle: Impedance balancing with Active Drive
Common mode rejection ratio (CMRR): > 60 dB
Power supply (for full performance): 48 V Phantom power (± 4 V)
Current consumption: 2.8 mA
Connector: XLR-3M. Pin 1: shield, Pin 2: signal + phase, Pin 3: - phase
Microphone diameter: 16 - 19 mm (0.6 - 0.75 in)
Capsule diameter: 16 mm (0.6 in)
Microphone length: 170 mm (6.7 in)
Maximum output voltage, RMS: 8.0 V
Polarity: +V at pin 2 for positive sound pressure
Temperature range: -40°C to 45°C (-40°F to 113°F)
Relative humidity (RH): Up to 90 %
Matching tolerance (frequency response and sensitivity): ±0.5 dB
Phase deviation for kit: < 5°
4006A Frequency response with free field grid
Typical on and off-axis response of a d:dicate™ 4006A Omnidirectional Microphone
Contents
- 2 x 4006A Omnidirectional Microphone
- 2 x Nearfield Frequency Grid
- 2 x Close-Miking Frequency Grid
- 2 x Diffuse-field Frequency Grid
- 2 x UA0777 Nose Cone
- 2 x UA0896 Windscreen for 0.75" (19mm) Microphones
- 2 x Microphone Holder
- 2 x APE30RS Acoustic Pressure Equalizer, 30mm Ball for 4006A and 4006C Microphone
- 2 x APE40RS Acoustic Pressure Equalizer, 40mm Ball for 4006A and 4006C Microphone
- 2 x APE50RS Acoustic Pressure Equalizer, 50mm Ball for 4006A and 4006C Microphone
- Stereo Boom