Samson S-Max MLI1 – Passive Mono Line Isolation Box for Eliminating Ground Loop Noise The Samson S-Max MLI1 is a compact passive mono line isolation box designed to deliver clean, stable, and noise-free audio signal transmission. If your system suffers from hum, buzz, or unwanted noise caused by ground loops, this unit allows you to quickly clean up your signal chain without complicated setup. It is ideal for safely connecting various components in live sound systems, studios, and AV installations while maintaining high audio quality even over long cable runs. Thanks to its passive design, the Samson S-Max MLI1 requires no power supply, making it a convenient and reliable tool for engineers, musicians, and technicians. Key Features The main advantage of this model is its effective elimination of hum and noise caused by ground loops. This issue commonly occurs when connecting mixers, audio interfaces, computers, media players, or electronic instruments powered from different sources. The built-in Samson STL transformer isolates the input from the output signal, reducing interference and improving overall signal integrity. The unit also offers flexible connectivity with XLR and 1/4" inputs and outputs, making it easy to integrate into various setups. This means faster setup, fewer technical issues, and reliable signal transmission in any environment. Clean Signal Over Long Cable Runs The MLI1 is not only designed to eliminate noise but also to convert unbalanced signals into balanced ones for long cable runs. This is especially important in live, broadcast, and installation environments where signal sources may be located far from mixers or amplifiers. Its flat frequency response from 10 Hz to 35 kHz (±0.2 dB) and extremely low distortion ensure natural sound reproduction. The high dynamic range and strong rejection of 50/60 Hz interference guarantee stable performance even in demanding conditions. The Ground Lift switch allows you to easily eliminate problematic ground connections. Applications The MLI1 is suitable for a wide range of applications. On stage, it can be used to connect keyboards, samplers, and playback devices to PA systems. In the studio, it helps optimize signal paths between interfaces, mixers, and outboard gear. In broadcast and AV environments, it ensures stable signal routing between devices. It is also perfect for permanent installations such as conference rooms, theaters, retail spaces, and presentation systems where reliability and simplicity are essential. Technical Specifications Type: Passive mono line isolation box Frequency response: 10 Hz – 35 kHz (±0.2 dB), up to 75 kHz at -1 dB Dynamic range: >140 dB Max input level: +15 dBu Gain: +0.2 dB Noise rejection: 126 dB THD: 0.0006% Input impedance: 7.7 kΩ Output impedance: 600 Ω Ground Lift: Yes Connectors: XLR and 1/4" Weight: 0.32 kg Dimensions: 110 x 54 x 46 mm Build Quality The rugged steel enclosure ensures high durability in demanding live and touring conditions. Its compact design protects internal components and guarantees long-term reliability, even with intensive use. What’s in the Box Samson S-Max MLI1 Summary The Samson S-Max MLI1 is a reliable solution for eliminating ground loop noise and improving audio signal quality. With its passive operation, high-quality transformer, and durable construction, it is an excellent choice for live sound, studio, and installation environments.