Whirlwind ISO-2 Dual Line Level Isolator and Balancer

The ISO-2 is the stereo version of the isolation job: two channels of transformer isolation and unbalanced to balanced conversion in one box, built around Whirlwind TRSP600L transformers for flat response and low distortion.

Each channel takes an XLR or a 1/4 inch jack that accepts TRS or unbalanced TS, and has its own ground lift button. Channel 2 adds a polarity reverse button, which is useful when the two sides of a feed do not agree.