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CMA-100 Advantages


This multifunctional amplifier has a built in AC/DC digital voltmeter, selectable audio filters, and an extremely wide dynamic range.

Balanced and Unbalanced high impedance inputs provide connectivity to to a variety of suspect wiring.

The CMA-100 also provides a bias voltage adjustable between -14.5V and +14.5V DC that is used to activate possible devices that are voltage or current sensitive. The bias generator is compatible with most types of line conditions.

All of these functions employ a sophisticated automatic gain control circuit that is superior to most audio amplifiers.


Countermeasures Amplifier

  • Input Impedance: 50k balanced
  • Common Mode Rejection: >75dB
  • Maximum Usable Input: 31V p-p
  • Preamp Auto attenuator: 0 to -40 dB ( with overload warning LED )
  • Manual Gain Control: 0, 25, 50, 75, 100 dB
  • Headphone Gain Control: 0 to 15 dB
  • Maximum System Gain: 115 dB manual mode, 120 dB in Auto Mode
  • Frequency Response: 25 Hz to 44Khz
  • High Pass Filter: 320Hz to 44kHz
  • Low Pass Filter: 25Hz to 3.2kHz
  • Band Pass Filter: 320Hz to 3.2kHz
  • Headphone Audio Output
  • Line-Out Audio Output: 600
  • Bias Control: 0 to +/-14.5V DC, 5mA max ( over current protected, input impedance is reduced to 3.6k ohms when bias is active )
  • Digital Voltmeter: 3.5 Digit, auto zero, auto polarity, +/-199.9V AC/DC
  • Power On/Low Battery LED ( LED off @ 6.0V )
  • Battery: 9V Alkaline ( 5 - 30 Hrs typical run time )
  • Maximum Input voltage: 250V AC/DC
  • Leakage Resistance to Case: >10M
  • Size: 7.3"(184.4mm) x 2.75"(69.8mm) x 1.75"(44.5mm)
  • Weight: 12.1 oz (343g)