Technical Specifications; Cleaning Information - AKG SOLIDTUBE Bedienungshinweise

has been connected to a power socket, then both the control light on
the front of the power supply should light up after switching on the
power supply unit mains switch and also the tube's heating element
should glow red-orange through the window (AKG logo) on the micro-
phone itself. With this the microphone is essentially ready for operation.
Note: A gentle humming noise can sometimes occur on the audio
output due to ground loops which, as an initial remedy, can possibly
be removed with the "Ground Lift" switch by the audio output
socket on the power supply. When pressed, this switch interrupts

3. Technical Specifications

Operating principle:
Directional characteristics:
Sensitivity at 1000 Hz:
Frequency range:
Electrical impedance:
Recommended load impedance:
Pre-attenuation:
Bass cut:
Equivalent noise level conforming to DIN 45405 (CCIR 468-2): 30 dB
Equivalent noise level conforming to DIN 45412 (A-weighted): 20 dB-A
Signal-to-noise ratio ref. 1 Pa (A-weighted):
Max. sound pressure for k = 3%: (pre-attenuation 0/–20 dB)
Powering:
Connector:
External dimensions:
Weight:
Gross weight incl. packaging:
This product conforms to the specifications of the European Union EMC and Low Voltage Directives in accordance with applied
standards EN 61 000-6-1:2001, EN 61 000-3-3:2001, EN 60 065:2002, as well as UL 6500.
10
the connection from pin 1 of the XLR socket to the zero volt /
ground level of the power supply unit.
Should this measure provide no remedy for the interfering hum
then you must locate and remove the cause of the interference
from the rest of the sound system in the usual way.

Cleaning information:

All surfaces can be cleaned from time to time with (industrial) methyl-
ated spirits or alcohol. The foam windscreen is best cleaned with a
mild detergent solution and is immediately ready for use when dry.
Large diaphragm pressure gradient microphone with vacuum tube preamplifier
Cardioid
20 mV / Pa –34 dBV re. 1 V / Pa
20–20,000 Hz ± 2.5 dB from published curve
200 ohms ± 25%
1000 ohms
Switchable to 0 dB and –20 dB
At 100 Hz 12 dB / octave, can be switched-on on the mains unit
74 dB
63 Pa 130 dB SPL / 355 Pa
With the delivered N-SOLIDTUBE power supply unit via 115 / 230 VAC,
±15/–10% (50–60 Hz)
6 pin XLR
63/57 Ø x 219 mm (2.5/2.25 Ø x 8.6 inch)
920 g (2 lbs.) net
5.0 kg (11 lbs.) incl. accessories and travelling case
145 dB SPL