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Hardware
Systems
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Microphone Amplifier
The Microphone Amplifier is a two-channel high gain, low noise preamplifier with both phono and balanced XLR microphone inputs for optimum impedance and noise characteristics. The Microphone Amplifier features variable gain from 10 dB to 55 dB in 5 dB steps, a toggle switch providing 20 dB of additional gain (maximum amplification of 5600x), and a bias switch for microphones requiring a bias voltage. Two BNC outputs provide easy connection to any TDT System 3 device.
Part number: MA3
Technical specifications:
| Input signal range: |
+/-10 V peak |
| -3dB bandwidth: |
100 kHz @ 30 dB gain |
| Gain accuracy: |
+/-1 dB |
| S/N (typical): |
110 dB (20 Hz to 30 kHz at 9.9V) |
| Noise floor: |
9.2 μV rms |
| THD (typical): |
< 0.002% (1 kHz tone, +/-7 V peak) |
| Spectral variation: |
3 dB (20 Hz to 30 kHz, 45 dB gain) |
| Input impedance: |
600 ohms |
| Output signal range: |
+/-10 V peak |
| Output impedance: |
5 ohms |
| Bias voltage: |
10 V, 150 mA max (XLR input) |
| Power and communication: |
zBus required |
 
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