AKG C 542BL OMNIDIRECTIONAL-HEMISPHERICAL CONDENSER BOUNDARY MIC

C 542 BL 
 
Extremely small and inconspicuous, lightweight yet rugged
Delivers superior sound combined with outstanding ease of use
High sensitivity and low self-noise ensures generous headroom

The C 542 BL is a high-quality boundary microphone designed to deliver superior results
for a multitude of recording applications. The boundary layer technique is well-known for
recording and offers non-directional pickup that is frequencyindependent.
Succeeding the proven C 562 BL, the C 542 BL is small, lightweight and easy to place .
no stand is needed. Since the transducer sits in a metal plate only 5 mm (0.2 in) thick,
the plate doesn?t interfere with or color the sound. Frequency response is very uniform within
its hemisphere and it captures the ?room sound?? of an instrument very accurately.
The C 542 BL can be permanently attached to the floor or wall of a studio using the screw holes
in the plate or attached temporarily using the supplied adhesive compound. Its 3-pin output
connector also has a switchable bass-cut filter to minimize surface-born noise.

Easy to use and sonically versatile, the C 542 BL is a great addition to the ?mic locker??
of any studio.
 
SPECIFICATIONS:
Polar pattern omnidirectional (hemispherical)
Frequency range 20 Hz to 20 kHz
Sensitivity 20 mV/Pa (-34 dBV)
Max. SPL 130 dB (for 1% THD)
Equivalent noise level (CCIR 468-3) 26 dB
Equivalent noise level 16 dB-A
Signal/noise ratio (A-weighted) 78 dB
Bass filter switchable flat or 150 Hz, 12 dB/octave
Impedance =2.000 ohms
Supply voltage 9 to 52 V phantom power to DIN 45596
Current consumption

With its half-space unidirectional polar pattern, low-profile design, and outstanding sound quality, the PRO44 is ideal for conference tables, podiums, lecterns and other installed-sound uses. This versatile boundary mic\'s self-contained electronics eliminate the need for external power modules. The PRO44 is equipped with a wide-range condenser element with low-mass diaphragm for superior performance.

Low profile for minimum visibility
Wide-range condenser element with low-mass diaphragm for superior performance
Self-contained electronics eliminate need for external power modules
Rugged design and construction
25\' (7.6 m) detachable cable (TA3F to XLRM-type)

Element: Fixed-charge back plate, permanently polarized condenser
Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
Frequency Response: 70-16,000 Hz
Open Circuit Sensitivity: -25 dB (56.2 mV) re 1V at 1 Pa
Impedance: 100 ohms
Maximum Input Sound Level: 114 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range: 86 dB, 1 kHz at Max SPL
Signal to Noise Ratio: 66 dB, 1 kHz at 1 Pa
Phantom Power Requiremens: 9-52V, 2 mA typical
Weight: 2.4 oz (67 g)
Dimensions: 2.87" (73.0 mm) maximum width, 3.56" (90.5 mm) maximum length, 0.59" (15.0 mm) height
Output Connector: TB3M-type
Cable: 25\' (7.6 m) long, with TA3F and XLRM-type connectors

A wide range condenser microphone with a cardioid polar pattern, the ultra-smart U891RCx is equipped with local or remote switching options. For flexible control in conference and boardroom installations, the unit's external contact closure ability allows a user to trigger an external device - a camera, for instance - from a switch on the microphone. Another ease-of-use feature: the microphone's electronic on-off switch can be set to three operating modes: touch-on/touch-off, press to talk, and press to mute. The mic is also equipped an 80 Hz low-cut UniSteep® filter to reduce pickup of low-frequency ambient noise. Its red LED status indicator can be controlled remotely. UniGuard® innovations offer unsurpassed immunity from radio frequency interference; interchangeable elements are available in cardioid, hypercardioid and omnidirectional polar patterns; a unique rotating PivotPoint® connector changes the cable exit point - no tools required. It requires 11 to 52V DC phantom power, which operates the microphone and switch circuitry.

• Designed for surface-mount applications such as high-quality sound reinforcement, conferencing, distance learning and other demanding sound pickup situations
• Ultra-quiet electronic switch can be set to any of three operating modes: "touch-on/touch-off," "touch-to-talk" and "touch-to-mute“
• External contact closure capability permits control of remote devices from microphone switch
• External LED control allows for accurate depiction of the live status of the microphone
• PivotPoint® rotating output connector allows cable to exit from either the rear or the bottom of the microphone
• Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance black finish for minimum visibility

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: 34 dB (19.9 mV) re 1V at 1 Pa
• Impedance: 200 ohms
• Maximum Input Sound Level: 130 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: 104 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 68 dB, 1 kHz at 1 Pa
• Phantom Power Requirements: 11-52V DC, 4 mA typical
• Weight: 266g
• Dimensions: 108.0mm long, 84.0mm maximum width, 23.0mm height
• Output Connector: TB5M-type
• Cable: 7.6m long, 3.2mm diameter, 5-conductor shielded cable (2 conductors under shield; 3 control wires outside shield); TA5F-type connector at microphone end, output end stripped and tinned for connection to electronic device

The U841A delivers exceptionally intelligible audio reproduction in a super-compact, low-profile design. Equipped with UniGuard® RFI-shielding technology, this omnidirectional condenser boundary microphone is designed for clear, highly intelligible sound reinforcement, professional recording, television and conferencing in surface-mount applications. The U841A has a 360° pickup angle and operates on battery or phantom power.

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
• Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Heavy die-cast case and silicon foam bottom pad minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance black finish for minimum visibility
• Operates on battery or phantom power

• Element: Fixed-charge back plate permanently polarized condenser
• Polar Pattern: Omnidirectional in hemisphere above mounting surface
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: Phantom: -39 dB (11.2 mV) re 1V at 1 Pa Battery: -40 dB (10.0 mV) re 1V at 1 Pa
• Impedance: Phantom: 200 ohms Battery: 270 ohms
• Maximum Input Sound Level: Phantom: 132 dB, 1 kHz at 1% T.H.D. Battery: 122 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: Phantom: 111 dB, 1 kHz at Max SPL Battery: 101 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 73 dB, 1 kHz at 1 Pa
• Phantom Power Requiremens: 11-52V DC, 2 mA typical
• Battery Type: 1.5V AA/UM3
• Battery Current Life: 0.4 mA / 1200 hours typical (alkaline)
• Switch: Off, on-flat, on-roll-off
• Cable: 25.0' (7.6 m) long (permanently attached to microphone), 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
• Accessories: AT8531 power module; battery; soft protective pouch

The e 912 is a pre-polarized condenser boundary microphone with
half-cardioid pick-up pattern. Its acoustic properties have been
optimized for instruments, vocals and speech. The e 912 is an ideal
choice for pianos, theatre and opera productions, conference applications,
altars and lecterns.To optimally match the installation environment,
the e 912 is available in black or creme white.

Features
Frequency response and sensitivity optimized for picking up instruments,
vocals and speech
Unobtrusive, flat housing
Extremely rugged and step-resistant
Shock-absorbing rubber base
Mounting slots for table installation
Gold-plated XLR connector
Integrated pre-amp 
Delivery Includes
e 912 Microphone
Pouch
User manual

Technical Data
Transducer principle (Microphone)  permanently polarized condenser 
Pick-up pattern  half-cardioid 
Sensitivity in free field, no load (1kHz)  10 mV/Pa 
Max. Sound pressure level (aktiv)  135,6 dB 
Equivalent noise level  26 dB(A) 
Phantom powering  48 V / 1,1 mA 
Nominal impedance  Min. terminating impedance  1000 Ohm 
Dimensions  126,5 x 105 x 26,5 mm 
Weight  ca. 550 g