GTC Industries TONE-PLUG

11 Function Audio System Test Generator

OUR PART #: TONE-PLUG Write the First Review.

No larger than a standard microphone connector...
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Our Price: $46.28
List Price: $49.95
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No larger than a standard microphone connector, GTC Industries' Tone Plug is a unique audio test instrument capable of generating a variety of test signals for the rapid troubleshooting, analysis and calibration of audio systems and components.  Equally at home in the studio or on the road, the Tone Plug produces 11 distinct audio system test functions.  The Tone Plug's compact size and multiple functions make it one of the handiest audio test instruments you could own.

The Tone Plug offers 5 user-selectable sine wave test tones at frequencies of 100, 250, 400, 1K and 10KHz.  An additional 5 special function test signals are also provided.  These include a 40/2400 Hz signal for testing the VLF components of a system such as sub-woofers, crossovers, amplifiers; a unique short duration, multi-frequency pulse for adjusting speaker time delays, reverbs and echo units; an amplitude sweep function for adjusting compressors, limiters and setting tape levels; automatic frequency stepping of the 5 fixed frequencies and a unique sweep tone for tracing wiring in racks and buildings.  The Tone Plug even includes a bright LED indicator for checking microphone cables and phantom power.

A single push button on the side of the Tone Plug allows for quick selection of the five fixed frequencies or the other special test functions.  The Tone Plug features a balanced mic output and is phantom powered, requiring no batteries or plug-in power supplies.  It's always ready for immediate use.


  • 5 Calibrated Sine Waves
  • Multi-frequency pluse
  • 20db Amplitude Sweep
  • Frequency Sweep Tone
  • 40Hz VLF System Test
  • Balanced Mic Level Output
  • No Batteries Required

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