Extremely cost efficient unidirectional boundary layer microphone for on table use. The frequency range is optimized for speech. Noise reduction: DNC – Dual Noise Canceling – by noise reduction through limited pickup area and limited pickup frequency. The connector is 3 Pin XLR (B-Lock Jack for C 400 BL-1)

Features
• Small & inconspicuous 
• Speech optimized
• Unidirectional pickup
• Repaintable

Small and inconspicuous boundary layer microphone; speech optimized frequency response; hypercardioid polar pattern; easy to repaint. The C400 BL is the first choice for any application calling for a small, low-profile boundary layer microphone. Its uses range from conferencing and lectures to theaters, surveillance, paging, and many others. Its frequency response has been optimized for speech pickup. Its hypercardioid polar pattern, speech optimized frequency response, and extremely small dimensions have made the C400 BL extremely popular. The design is inconspicuous and the housing can be painted easily in any color to make it almost invisible against its backing.

• Transducer Principle: condenser prepolarized
• Frequency Range: 40–14,000 Hz
• Polar Pattern: hypercardioid
• Sensitivity at 1,000 Hz: 13.5 mV/Pa (-37 dBV)
• Equivalent Noise Level: < 32 dB-A
• Sound Pressure Level for 1 % THD: 115 dB
• S/N Ratio (A-weighted): > 62 dB Electr.
• Impedance: < 200 ohms
• Load Impedance: > 2,000 ohms
• Power Requirement: 1.5 to 15 volts
• Connector: 3-Pin XLR-type (B-Lock Jack for C 400 BL-1)
• Cable Length: 1.5 m (5 ft.)
• Finish: non reflective black
• Size: 43 x 23 x 13 mm (1.7 x 0.9 x 0.5 in.)
• Net Weight: 5.5 g (0.2 oz.)
• Special Features/Applications: microphone for all PC applications
• Included Accessories: clip on mounting plate, phantom power adapter (for C 400 BL)
• Optional Accessories: B 18 battery power supply N 62 E, N 66 E AC power supplies PA 400 phantom power adapter (for C 400 BL-1).

Contoured Frequency Response
With a low frequency roll-off, high frequency roll-off and mid frequency peak, the C400BL is optimized for speech and vocal reproduction.

Hyper-cardioid Polar Pattern
The hypercardioid polar pattern is effective in minimizing ambiance and off-axis audio.

Dual Noise Cancelling (DNC)
The combination of a narrow pickup angle and contoured frequency response further reject ambient noise.

Small Profile
The small, unobtrusive profile allows for easy concealment.

Repaintable Surface
The C400BL features a repaintable surface that aids in concealing the microphone from view.

AKG C400BL Boundary Layer Microphone with XLR Output