Check the listing for details. Lehle P-ISO Isolator/DI Box. Condition: New. Listed at 149.99 USD. State-of-the-art Passive DI Box The Lehle P-ISO is a state-of-the-art passive DI box with ultra-high-quality sound. You can deploy the P-ISO to isolate signals and eliminate hum, and balance high-impedance signals. You can also use it for reamplification or any other application that demands a clean, noise-free signal. This top-shelf DI boasts an Lehle Transformer HZ, which galvanically isolates your signal to eliminate ground-induced interference. While it's designed for use with high-impedance signals, the P-ISO also tackles low-impedance signals with exceptional quality. And since the P-ISO is a passive device, there's no need for a power supply. The Lehle P-ISO also boasts an optimized size and weight, ensuring it fits effortlessly under your pedalboard or in your pocket.