Skip to content

Sound Tools - NL4 Sniffer/Sender Tester

Original price £89.99 - Original price £89.99
Original price
£89.99 - £89.99
Current price £89.99

Instantly test and identify faulty speaker cables with this set of analog remote-end NL-4 cable testers. Machined from durable aluminum tubing, the NL-4 Sniffer and Sender combo utilizes battery power and 4 LED lights to troubleshoot cables, without bringing the ends together.


The Original Remote End Cable Tester, now for NL-4 connections. Test all your cables without bringing the ends together with the SoundTools NL-4 Sniffer/Sender units.

-Two piece testing unit can instantly test cables where they lie

-Designed and manufactured for lifelong reliability

-Test for 16 different issues with a simple 4-LED display

-Compatible with NL-4 Neutrik SpeakOn connections

The NL-4 Sniffer/Sender field unit is an all-analog remote end cable tester that tests for good connections as well as 16 different issues in speaker cables. The sender unit uses a car alarm battery with long-lasting life to power the unit. Four LED lights on the sniffer unit instantly display results, giving you a quick-and-easy way to check whether your line is good. If all 4 lights are green, you’re good to go.

The NL-4 Sniffer/Sender is made with the same high quality that allows us to keep a lifetime Happy Human Warranty on all our products. A durable anodized aluminum tube protects the all-analog testing units. There are no fragile moving parts or seams, making these some of the most indestructible testers on the market. 

Every Sniffer/Sender Unit comes with a sticker that can be attached to the sniffer end (or where ever is most convenient for you) that shows what the LED light combinations mean. Also available for XLR, DMX, and ¼” TRS connections.

Delivery Time

Next Working Day Delivery available for orders placed before 1pm Monday - Friday.

Free Standard 3- 5 Working Day delivery on orders over £250


Website is easy to use and navigate and my order was there on time.

If you work in the entertainment industry, you should definitely subscribe to this website.

Rob Summers

George is very knowledgeable and super helpful when asked for his advice/thoughts on technique and problems encountered mixing up cast. They stock a wide range of products and always deliver quickly.

John Barlow

Stocking a wide variety of consumables and tools, they truly are a one stop shop for needed products in the technical theatre industry. Super fast delivery and quick to answer questions!

James Cook