RapcoHorizon LTI-1 LTI-1 Stereo Direct Box with Ground Lift

Professional Laptop Audio Interface For Clean Signal Conversion

The RapcoHorizon LTI-1 Laptop Interface is a passive direct box designed to connect consumer-grade devices like laptops, tablets, and mobile players to professional audio equipment. It converts the 3.5mm stereo output from these devices into two balanced, mic-level XLR outputs, ensuring compatibility with professional mixers, sound systems, and recording gear. Compact and reliable, this unit is an essential tool for live sound engineers, AV technicians, and presenters who need dependable audio conversion in any setting.

Dual Output Design For Stereo Or Mono Operation

With two XLR male outputs, the LTI-1 provides balanced left and right channels for stereo operation. For situations where mono sound is required, the built-in mono switch easily sums both channels into a single balanced output. This flexibility makes it equally useful in conference rooms, houses of worship, classrooms, and live venues where different system requirements may apply.

Noise Control With Ground Lift Options

The unit features two independent ground-lift switches, one for each channel, allowing operators to eliminate hum and buzz caused by ground loop interference. This feature ensures clear, uninterrupted audio even in environments with complex power setups or multiple interconnected devices. Ground lift is especially important in live sound and recording applications where unwanted noise can compromise the entire mix.

Signal Control With Attenuation Pad

For sources with hotter output levels, such as certain laptops and mobile devices, the LTI-1 includes a -20 dB pad switch. Engaging the pad reduces the signal level before it reaches the mixer or sound system, preventing distortion and protecting downstream equipment. This ensures the interface remains versatile and safe to use across a wide variety of devices and environments.

Durable Construction With Integrated Cable

The LTI-1 is built with a rugged enclosure to withstand frequent use in professional applications. A 3-foot attached cable with a 3.5mm stereo male plug connects directly to laptops or mobile devices, ensuring a secure and stable input connection. The compact box design is easy to transport, fitting neatly into toolboxes, road cases, or portable AV kits.

Reliable Solution For Professional AV Systems

This interface provides a simple but powerful solution for integrating consumer-grade devices into professional AV setups. By offering stereo and mono functionality, ground-lift control, and a built-in pad switch, the RapcoHorizon LTI-1 delivers quiet, balanced, and dependable performance wherever it is needed. From boardrooms to touring rigs, this unit ensures your laptop or device connects seamlessly to the system.