The Recoil MST-1 is a multifunctional audio tester built for technicians and enthusiasts who need a single, portable tool to handle signal testing, voltage measurement, phase checking, and continuity verification. It covers the full diagnostic workflow for car audio installations — from source to speaker — without requiring multiple separate instruments. A built-in rechargeable lithium battery and auto shutoff make it practical for real-world shop or install-bay use.

• Tone Generator: Outputs a 5V signal across a frequency range of 13Hz to 10kHz for signal path tracing and system testing.
• Voltage Measurement: Reads constant DC voltage up to 32V and AC voltage up to 36V, plus AC music signal voltage.
• Phase Testing: Verifies speaker and system phase to confirm correct polarity throughout the signal chain.
• Continuity Testing: Checks wire and signal cable continuity to quickly identify breaks or faults.
• Resistance Measurement: Built-in resistance meter for speaker and circuit diagnostics.
• Backlit LCD Display: Illuminated screen for clear readings in low-light environments.
• Included Accessories: Ships with RCA connectors and alligator clips for flexible connection to audio components.