User's Manual

3. Specifications of the Microphone

Operating Principle: Pressure gradient transducer with double-diaphragm and vacuum tube preamplifier

Directional Characteristics: Omni-, cardioid-, figure-eight, and six intermediate positions remotely controlled from the

microphone on the powering unit

Sensitivity at 1000 Hz: 10mV/Pa Ⳏ –40 dBV*)

Frequency Range: 30 to 20,000 Hz ± 2.5 dB from published curve

Electrical Impedance: 200 ohms ± 25 %

Recommended Load Impedance:  1000 ohms

Equivalent Noise Level: 32 dB (DIN 45405/CCIR 468-2)

22 dB-A (acc. to DIN 45412, A weighted)

Powering: Via the included powering unit N 12 VR with 115/230 VAC, +15/–10 % (50–60 Hz)

Maximum Sound Pressure Level: For k=3 %=128 dB SPL Ⳏ 50 Pa

Pre-attenuation: Switchable to –10 dB and –20 dB

Roll-off Filter: Two position filter, remotely controllable from powering unit N-Tube

Connector: Large-sized Tuchel, 12 pin

Dimensions: 42 ø × 225 mm (1.65 ø × 8.9 inch)

Net Weight: 680 g (24 oz.)

Shipping Weight: Approx. 4.5 kg (~10 Ibs.)

*) The sensitivity may be increased by 10 dB with a switch on the p. c. board.

This product conforms to the specifications of the European Union EMC and Low Voltage Directives in accordance with applied stand-

ards EN 61 000-6-1:2001, EN 61 000-3-3:2001, and EN 60 065:2002.

Component locations