

DPA 3506A Stereo Kit with Matched 4006A Omni Microphones
PRICE - Rs. 9,75,432
DPA 3506A stereo kit with two 4006A omni mics matched within ±0.5 dB: transparent, detailed, 10 Hz - 20 kHz; with boom, holders and more. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
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Acoustics (4006A)
| Directional pattern | Omnidirectional |
| Principle of operation | Pressure |
| Cartridge type | Pre-polarised condenser |
| Frequency response | 10 Hz - 20 kHz |
| Effective frequency range ±2 dB | 10 Hz - 20 kHz |
| Sensitivity, nominal, ±2 dB at 250 Hz | 36 mV/Pa; -28.9 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) |
| Distortion, THD < 1% | 133 dB SPL RMS, 136 dB SPL peak |
| Dynamic range | Typ. 121 dB |
| Max. SPL, THD 10% | 146 dB SPL peak |
| Matching tolerance (frequency response and sensitivity) | ±0.5 dB |
| Phase deviation for kit | < 5° |
Electrical (4006A)
| Switchable attenuator, filters etc. | 0 dB / -20 dB |
| Rated output impedance | 200 Ω |
| 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) | P48 (phantom power) |
| Current consumption | 2.8 mA |
| Connector | XLR-3M. Pin 1: shield, Pin 2: signal + phase, Pin 3: - phase |
| Maximum output voltage, RMS | 8.0 V |
| Polarity | +V at pin 2 for positive sound pressure |
Physical (4006A)
| Weight | 163 g (5.7 oz) |
| Microphone diameter | 16 - 19 mm (0.6 - 0.75 in) |
| Capsule diameter | 16 mm (0.6 in) |
| Microphone length | 170 mm (6.7 in) |
| Temperature range | -40°C to 45°C (-40°F to 113°F) |
| Relative humidity (RH) | Up to 90 % |
| Colour | Matte black |
Product overview
The DPA 3506A is a complete stereo kit with two carefully factory-matched, phantom-powered 4006A omnidirectional condenser microphones, matched within ±0.5 dB on both frequency response and sensitivity.
DPA's wide and versatile pencil microphone series is legendary in high-end recording and film production, delivering clean, accurate sound. DPA has collected its award-winning recording microphones in specialised stereo kits that contain the microphones and accessories you need to capture fantastic sound. The kit includes the microphones, windscreens, boom, holders, clips and much more.
Even though the standard tolerances on DPA recording microphones are already extremely low, a stereo match is even closer. The 4006A microphones are linear and true in character and come as a hand-matched pair for reference stereo recording.
The 4006 capsule offers total transparency in any recording situation. It picks up incredible detail and depth of sound, and the definition of its high-frequency characteristics across a wide range of instruments is impressive, with natural sound, high sensitivity, a low noise floor and a linear frequency response from 10 Hz to 20 kHz (±2 dB). The 4006A is ideal for A-B stereo pairs for symphonic concert hall recordings, and 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 equalisers, a nose cone and interchangeable protection grids, which transform the microphone acoustically, without the phase shift, noise or distortion of an electrical filter.
| Matched response and sensitivity | ±0.5 dB |
| Linear, ±2 dB | 10 Hz - 20 kHz |
| Equivalent noise, typ. | 15 dB(A) |
| Max. SPL peak, THD 10% | 146 dB |
Key features
- Two factory-matched 4006A omnidirectional microphones
- Matched within ±0.5 dB on frequency response and sensitivity, phase deviation < 5°
- Total transparency, incredible detail and depth
- Linear frequency response 10 Hz - 20 kHz (±2 dB)
- 0 dB / -20 dB switchable attenuator
- Complete kit: microphones, windscreens, boom, holders, clips and more
Made for
- A-B stereo pairs for symphonic concert hall recording
- Reference stereo recording
- Vocals
- Close-miking all types of instruments
- Outdoor interviews
In the box
- 2 x 4006A omnidirectional microphones, factory-matched
- Windscreens, boom, holders, clips and more accessories (official kit description)
DPA 3506A: frequently asked questions
How closely are the microphones matched?
Within ±0.5 dB on both frequency response and sensitivity, with a phase deviation below 5° for the kit.
What is the 4006A best known for?
Total transparency in any recording situation, with incredible detail and depth, natural sound, high sensitivity and a low noise floor.
What are the typical applications?
A-B stereo pairs for symphonic concert hall recordings, reference stereo recording, vocals, close-miking all types of instruments and outdoor interviews.
How are the microphones powered?
Both run on P48 phantom power with 2.8 mA current consumption and drive cables up to 100 m (328 ft).
Can the sound be shaped?
Yes. Acoustic pressure equalisers, a nose cone and interchangeable protection grids change the frequency response and directional characteristics acoustically, without electrical filters.
Where can I buy the DPA 3506A in India?
The DPA 3506A is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: A-B pair in the concert hall
Engineers recording symphonic concerts.
Connections
| Connect | To |
|---|---|
| 2 x 4006A | Stereo boom |
| XLR x 2 | Recorder with P48 |
Setup
- Mount the matched pair on the boom as a spaced A-B pair.
- Connect both channels and switch on P48.
- Match the gains and record.
Tip: The pair is matched within ±0.5 dB.
Workflow 2: Reference stereo recording
Recording engineers and producers.
Connections
| Connect | To |
|---|---|
| 2 x 4006A | Holders on stands |
| XLR x 2 | Interface with P48 |
Setup
- Set up the pair for the room.
- Record both channels.
Tip: Linear and true in character, from 10 Hz to 20 kHz.
Workflow 3: Vocals
Studio engineers.
Connections
| Connect | To |
|---|---|
| 4006A | Stand with holder and windscreen |
| XLR | Preamp with P48 |
Setup
- Place one 4006A in front of the singer with the windscreen.
- Set the gain.
Tip: The 4006A also excels on vocals.
Workflow 4: Close-miking instruments
Musicians and engineers.
Connections
| Connect | To |
|---|---|
| 4006A | Stand with clip |
| XLR | Console with P48 |
Setup
- Clip the microphone close to the instrument.
- Set the attenuator to 0 dB or -20 dB as needed.
Tip: Detail and depth across a wide range of instruments.
Workflow 5: Outdoor interview
Broadcast and film crews.
Connections
| Connect | To |
|---|---|
| 4006A with windscreen | Hand or stand |
| XLR | Field recorder with P48 |
Setup
- Fit the windscreen.
- Hold or place the microphone between the speakers.
- Record.
Tip: The 4006A is an excellent outdoor interview microphone.
Workflow 6: Shaping the sound acoustically
Engineers fine-tuning the pickup.
Connections
| Connect | To |
|---|---|
| 4006A | Grid, nose cone or pressure equaliser (available separately) |
Setup
- Change the protection grid or fit an acoustic accessory.
- Listen to the new response.
Tip: Acoustic accessories add no phase shift, noise or distortion.








