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SMD Distortion Detector Plus (DD-1+)

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Availability: Out of stock.

Regular Price: $299.99

Special Price: $249.99

Quick Overview


The purpose of this tool is to enable the user to set the gain of an audio amplifier to match the source unit’s output level, quickly and accurately. Proper gain overlap setting of a system ensures that no matter how high the volume of the headunit is, the user cannot excessively overdrive the system and cause damage to the amplifier or speakers.

Proper gain overlap setting also ensures the end user is getting everything possible out of his/her system while minimizing unwanted noise. The DD-1+ can also be useful for detecting distortion in the audio signal caused by poorly designed or malfunctioning audio equipment.

If you are familiar with our original DD-1 tool, the new / additional features of the DD-1+ are:

  • Fully variable gain overlap setting from 0.0dB to 15.0dB
  • Ability to check the gain overlap setting of an amplifier without making adjustments to it. (Great for checking a customer’s system if it returns for warranty reasons or a tune up) Also a great way to sell a tune up.
  • Input voltage capacity raised to 200Vrms (40,000 W into 1 ohm)
  • RMS AC voltmeter built in for reference


Everyone hides these in the back of the book. We are proud of our specs, they aren’t lies, so we are putting them up front.

  • The distortion detection circuitry is 100% analog, digital microprocessing system used for display and calculation of overlap
  • Distortion Detection trigger level > 1.0% Harmonic Distortion
  • 3 stage autoranging for wide range of input signal from 1Vrms – 200Vrms. (40,000 Watts at 1 ohm)
  • Auto-shut off timer 8 - 10 minutes after ON button is pressed
  • Battery self-test and display of condition when DD-1+ is initialized

Product Manual (Download)

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