NUX NMT-1 4-in-1 Cable Tester, Current Meter, and Chromatic Tuner

NUX NMT-1: Four Pedalboard Troubleshooting Tools in One Pocket Box

The NUX NMT-1 is a 4-in-1 multi-tester and chromatic tuner that folds a cable tester, a DC power-cable tester, a pedal current-and-voltage meter, and a precision tuner into one pocket-size body. It exists because a pedalboard failure is almost always one of a few things, a broken cable, a bad power lead, or an over-taxed supply, and diagnosing which one usually means swapping parts blindly. The NMT-1 turns that guesswork into a measurement: plug in the suspect cable or pedal and the backlit LCD tells you what is wrong. A built-in rechargeable battery keeps it ready in a gig bag with no loose 9V cells to manage. For any player who runs more than a couple of pedals, it is the single tool that keeps a board running.

Find the Faulty Cable in Seconds

The cable tester checks both 1/4-inch TS and TRS audio patch cables and 2.1 mm DC power cables for continuity and faults. A cable that reads open has a broken conductor; one that reads shorted has a damaged jacket or a failed solder joint bridging the connections. Intermittent cables, the ones that only crackle when you move, are the hardest to catch by ear, and this is exactly where a dedicated tester earns its place. Instead of pulling a whole board apart, you test each lead in a few seconds and pull only the bad one. For power cables it also confirms polarity, so a mis-wired DC lead never gets a chance to harm a pedal.

Measure Real Current Before You Wire a Supply

The current meter reads a pedal's actual current draw in milliamps along with its operating voltage, which is the number that truly matters when planning a power supply. Manufacturer labels often state a maximum that a pedal rarely reaches, so adding label ratings tends to oversize, or worse, undersize, a supply's isolated outputs. Measuring the real draw lets you assign each pedal to an output with genuine headroom and avoid the sag and noise that come from an overloaded rail. Digital pedals in particular can pull far more than analog stompboxes, and the NMT-1 shows you the truth for each one. That single measurement is what separates a quiet, reliable board from a mystery-noise board.

A Precise Chromatic Tuner Built In

Beyond diagnostics, the NMT-1 is a full chromatic tuner covering A0 at 27.5 Hz up to C8 at 4186 Hz, with an accuracy of plus or minus 1 cent. That range comfortably spans a bass low B through the top of a guitar neck, and the tight accuracy is fine enough for careful studio intonation, not just a quick rough tune. The large backlit LCD makes the note and pitch offset easy to read on a dim stage. Because it is chromatic, it tunes any note in any tuning without switching modes. Having a serious tuner in the same tool that tests your cables means one pocket device covers both setup and troubleshooting.

Rechargeable, Portable, and Always Ready

The NMT-1 runs on a built-in rechargeable battery that charges over a standard USB-C cable, so there are no disposable batteries to buy and nothing to run flat at the worst moment. Its pocket-size body slips into a gig bag, a guitar case pocket, or a pedalboard accessory pouch. Players consistently call the current-draw meter genuinely useful and the whole unit a handy troubleshooting companion. Whether you are wiring a new board, chasing a noise at soundcheck, or just tuning up before a set, it puts four essential jobs in one hand. For gigging and home players alike, it replaces a drawer of single-purpose tools.