d:fine™ 4188 & 4288
Flex Directional Headset and Earset Microphone
Specifications for 4188
Directional pattern
Cardioid
Principle of operation
Pressure gradient
Cartridge type
Pre-polarized condenser
Frequency range
20 Hz - 20 kHz
Frequency range, ±2 dB, Near field 2-3 cm (0.8 - 1.2 in)
100 Hz - 20 kHz with 3 dB soft boost at 8 - 20 kHz
Sensitivity, nominal, ±3 dB at 1 kHz
6 mV/Pa; -44 dB re. 1 V/Pa
Equivalent noise level, A-weighted
Typ. 26 dB(A) re. 20 µPa (max. 28 dB(A))
Equivalent noise level, ITU-R BS.468-4
Typ. 38 dB (max. 40 dB)
S/N ratio (A-weighted), re. 1 kHz at 1 Pa (94 dB SPL)
Typ. 68 dB(A)
Total harmonic distortion (THD) - Legacy
< 1% up to 123 dB SPL peak, < 1% up to 120 dB SPL RMS sine
Total harmonic distortion (THD) - CORE
< 1% THD up to 137 dB SPL peak
Dynamic range - Legacy
Typ. 95 dB
Dynamic range - CORE
Typ. 111 dB
Max. SPL, peak before clipping
144 dB
Output impedance
From MicroDot: 30 - 40 Ω. From DAD6001-BC: 100 Ω
Cable drive capability
Up to 300 m (984 ft) with DAD6001-BC XLR Adapter
Output balance principle
Signal balanced with DAD6001-BC XLR Adapter
Common mode rejection ratio (CMRR)
> 60 dB from 50 Hz to 15 kHz with DAD6001-BC XLR Adapter
Power supply (for full performance)
Min. 5 V to max. 50 V through DPA adapter for wireless systems
Current consumption
Typ. 1.5 mA (microphone). 3.5 mA with DAD6001-BC XLR Adapter
Weight
Microphone boom: 0.8 g (0.03 oz). Earhook: 1.1 g (0.04 oz). Cabel: 6.6 g (0.23 oz). Total: 8.5 g (0.30 oz)
Microphone diameter
5.4 mm (0.21 in)
Cable length
1.3 m (4.3 ft)
Cable color
Black or beige
Cable diameter
1.6 mm (0.06 in)
Polarity
+V at MicroDot pin for positive sound pressure (and pin 2 on DAD6001-BC XLR adapter)
Electromagnetic compatibility (EMC)
Fully compatible
Temperature range
-40°C to 45°C (-40°F to 113°F)
Relative humidity (RH)
Up to 90%
4188 Frequency response
<Typical on and off-axis response of a d:fine™ 4188>
4188 Polar pattern
<Typical directional characteristics of a d:fine™ 4188>
4188 Frequency response in near and far field
<Frequency response of the d:fine™ 4188 in near and far field>
Specifications for 4288
Directional pattern
Cardioid
Principle of operation
Pressure gradient
Cartridge type
Pre-polarized condenser
Frequency range
20 Hz - 20 kHz
Frequency range, ±2 dB, Near field 2-3 cm (0.8 - 1.2 in)
100 Hz - 20 kHz (4 - 6 dB soft boost at 15 kHz)
Sensitivity, nominal, ±3 dB at 1 kHz
6 mV/Pa; -44 dB re. 1 V/Pa
Equivalent noise level, A-weighted
Typ. 26 dB(A) re. 20 µPa (max. 28 dB(A))
Equivalent noise level, ITU-R BS.468-4
Typ. 38 dB (max. 40 dB)
S/N ratio (A-weighted), re. 1 kHz at 1 Pa (94 dB SPL)
Typ. 68 dB(A)
Total harmonic distortion (THD) - Legacy
< 1% up to 123 dB SPL peak
Total harmonic distortion (THD) - CORE
< 1% THD up to 137 dB SPL peak
Dynamic range - Legacy
Typ. 97 dB
Dynamic range - CORE
Typ. 111 dB
Max. SPL, peak before clipping
144 dB
Output impedance
From MicroDot: 30 - 40 Ω. From DAD6001: 100 Ω
Cable drive capability
Up to 300 m (984 ft) with DAD6001-BC XLR Adapter
Output balance principle
Signal balanced with DAD6001-BC XLR Adapter
Common mode rejection ratio (CMRR)
> 60 dB from 50 Hz to 15 kHz with DAD6001-BC XLR Adapter
Power supply (for full performance)
Min. 5 V to max. 50 V through DPA adapter for wireless systems
Current consumption
Typ. 1.5 mA (microphone). 3.5 mA with DAD6001-BC XLR Adapter
Color
Black, beige or brown
Weight
Single Ear: 10 g (0.35 oz)
Microphone diameter
5.4 mm (0.21 in)
Microphone length
12.7 mm (0.5 in)
Cable length
1.25 m (4.1 ft)
Cable color
Black, beige or brown
Cable diameter
1.6 mm (0.06 in)
Polarity
Positively increasing sound pressure produces positive-going voltage at MicroDot pin (and pin 2 on DAD6001 XLR adapter)
Temperature range
-40°C to 45°C (-40°F to 113°F)
Relative humidity (RH)
Up to 90%
4288 Frequency response
<Typical on and off-axis response of a d:fine™ 4288>
4288 Polar pattern
<Typical directional characteristics of a d:fine™ 4288>
4288 Frequency response in near and far field
<Frequency response of the d:fine™ 4288 in near and far field>
d:fine™ 4188 & 4288
Flex Directional Headset and Earset Microphone
4188 Frequency response
4188 Polar pattern
4188 Frequency response in near and far field
Specifications for 4288
4288 Frequency response
4288 Polar pattern
4288 Frequency response in near and far field