MC7100 Digital Frequency Shifting Amplifier
The MC7100 composite digital amplifier for teaching is a complete set of professional amplification device specially designed
for school classroom and also meets amplification requirements in courts, government authorities, army, enterprises and
government-supported organizations. Regarding particularity of medium and small-sized public sites, the device solves three
difficulties such as amplification stability, sensitivity and amplification articulation, effectively inhibits acoustic feedback,
significantly weakens microphone whistling and ensures prime amplification.
1. 24Bit A/D and D/A conversion; 24-bit DSP processor and 48KHz high-speed sampling.
2. Feedback inhibition composed of 4 parameter filters and full-digital DSP frequency shifting;
3. 6-channel microphone inputs, MIC1-MIC4 with phantom power supply. (MIC1～4 1/4)
4. Voice excitation function to enhance voice articulation.
5. Built-in compressor, automatic dynamic control.
6. 4-band parameter values balance to absorb 4 notching points.
7. Automatic protection, automatic gaining, and dynamic protection.
8. 4-channel input (connected to computer, DVD etc.) and 2-channel recording electric level output.
9. Constant resistance and constant voltage optional (2×100W constant resistance output, 120V constant voltage output).
10. Microphone volume/music volume and machine parameter numerical adjustment and remotely controlled by computers
(computer software control available for free).
11. Panel keys locked to prevent students’ accidental operation
Specifications and Parameters
Operating power supply: 220V±10% (AC,50/60Hz)
Microphone input level: -40dB
Microphone input resistance: 2KΩ
Band pass frequency characteristic: 200HZ-6KHZ
Microphone frequency characteristic: 100Hz～15KHz (-3dB, band pass off)
Line frequency characteristic: 20Hz～20KHz(±2dB)
Distortion: ≤0.1% DSP processor ≤0.065% (1KHz/0dB)
SNR: ≥76dB DSP processor ≥95dB (A weighing)
Boundary microphone polarization power supply: 48V (D.C.)
Line input level: 0dB 2 lines
Line output level: 0dB 2 lines
Rated power output: constant resistance and constant voltage optional (2×100W constant resistance output, 120W constant voltage output)
Volume (W×D×H): 480mm×310mm×95mm