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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 1/4" TRS connectors 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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