The Mackie MTest-1 cable tester is a professional audio testing device designed to check cable integrity in various audio configurations. This portable tool offers comprehensive connection compatibility with XLR, TRS, 1/8 inch (3.5 mm), and RCA interfaces, enabling the testing of the most common types of audio cables. The device provides immediate visual feedback through a bright LED display that clearly indicates pin status and cable functionality. Constructed with a rugged steel housing, the MTest-1 is built for regular professional use in demanding environments such as live performances, studio recordings, and location recordings. The unit operates on a single 9V battery, making it fully portable for on-the-go testing without the need for a power outlet. Its intuitive interface automatically adjusts pins when testing standard cable combinations, while included signal testing probes allow for continuity tests on virtually any cable or inactive circuit. Measuring approximately 12.7 cm in length and weighing 340 g, this cable tester delivers reliable performance for audio professionals and enthusiasts who require accurate cable verification. The MTest-1 represents Mackie's commitment to quality audio equipment and provides a straightforward solution for maintaining cable reliability in audio production workflows. Its robust construction and practical design make it suitable for frequent use in various audio applications where cable integrity is essential for optimal sound quality.