The AKG SolidTube Microphone implements the classic design architecture of tube circuitry while maintaining an affordable price point. The cardioid studio condenser microphone features the ECC 83 vacuum tube, resulting in the warm audio signal characteristic of tube technology. The Solid Tube's large screen (housing) assembly reacts minimally with the capsule, creating a broad +6dB peak in response above 10kHz, +/- 2dB over most of the range. The cardioid polar pattern minimizes off axis noise or audio at an excess of 20dB at 180 degrees. The end result is a large diaphragm studio condenser microphone tailored made for solo vocal and instrument recording in the studio.
Other features include a pre-attenuation switch to provide 20dB of reduction for capturing sources that would otherwise overload, and a low frequency roll-off switch to eliminate low-end rumbling noise below 100Hz.
Shock-mount, flight case, wind screen, and cable are all included.
| Transducer | Tube Condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 20 Hz - 20 kHz (+/- 2.5 db) |
| Dynamic Range (Typical) | 110 dB |
| Signal-to-Noise Ratio | 74 dB (A-Weighted) |
| Maximum Input Sound Level | 130 dB @ 1 kHz, 3% THD (145 dB with -20 dB Pad) |
| Power Requirements | External Power Supply, Included |
| Output Impedance | 200 Ohms (± 25%) |
| Output Connectors | XLR-3M Type (Output Connector from Power Supply) |
| Pad | Yes, -20 dB |
| Low Frequency Roll-Off | Yes, 12 dB/Octave, 75 Hz (On Power Supply) |
| Dimensions | 8.6 x 2.5" (219 x 45mm) LxD |
| Weight | 2.01 bs (920 g) |