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SOLIDTUBE
Tube Condenser Microphone
Description
The AKG Model Solidtube is a large diaphragm condenser
microphone that benefits from the combination of modern
solid-state technology and vacuum tube driven circuitry. The
microphone, released in 1997, AKG’s Jubilee year, provides
the characterisitc warmth and generous margin of overload
expected from classic tube powered designs. Solid state
electronics within the N-Solid power supply ensure quiet and
reliable operation.
The Solidtube has a large double screened housing that
reacts minimally with the capsule and provides shielding from
RF interference. Frequency response remains relatively flat
within the range of ±2 dB. The mid-range cut at
approximately 2 kHz and presence rise above 10 kHz are
signature characteristics of AKG large diaphragm condenser
mics dating back to the classic C 12. They provide depth and
clarity to any recording. Mid-band pattern rejection at 180
0
is
in excess of 20 dB.
The microphone is response tailored for solo vocal and
instrumental pickup in the studio, and as such, has only a
dedicated cardioid pattern. The Solidtube is shipped with all
necessary cabling, an isolation shock mount, windscreen and
a custom aluminum flight case.
Features
• Dedicated cardioid pattern with
response tailored to solo vocals
and instrumentals in the modern
studio
• Wide dynamic range of 110 dB in
the studio
• Integral 20-dB pre-attenuation
switch
• Low frequency cut at 100 Hz
• Includes aluminum flight case, with
all necessary cabeling, shock
mount and windscreen
Specifications
SOLIDTUBE Microphone:
Transducer type: 1 in. (25 mm) diaphragm
pressure gradient
Diaphragm material: Gold-sputtered mylar foil
Tube type: ECC 83 (12AX7)
Frequency response: 20 Hz - 20 kHz
Polar pattern: Cardioid
Impedance: 200 ohms ±25%
Recommended load impedance: greater than 600 ohms
Sensitivity at 1 kHz: 20 mV/Pa; -34 dB (dB re 1 V)
Equivalent noise level (A-weighted): 20 dB-A (DIN 45412)
Sound pressure level for 3% THD: 130 dB (145 dB SPL with -
20 dB pre-attenuation)
Dynamic Range: 110 dB
S/N ratio re 1 Pa (A-weighted): 74 dB
Pre-attenuation switch: -20 dB
Low frequency roll-off: 12 dB/octave below 100 Hz
Current consumption: less than 2 mA
Microphone size: 2.5” (63.5 mm) diameter;
8.6” (219 mm) length
Microphone net weight: 2 lb. (0.92 kg)