![Amazon.com: OLLOAUDIO S4X 1.3 Calibrated Studio Headphones | Tuned for Mixing and Mastering Stereo formats | Flat Frequency Response : Musical Instruments Amazon.com: OLLOAUDIO S4X 1.3 Calibrated Studio Headphones | Tuned for Mixing and Mastering Stereo formats | Flat Frequency Response : Musical Instruments](https://m.media-amazon.com/images/I/71PjdhwP+vL.jpg)
Amazon.com: OLLOAUDIO S4X 1.3 Calibrated Studio Headphones | Tuned for Mixing and Mastering Stereo formats | Flat Frequency Response : Musical Instruments
OLLO - audio tools - It's been 5 years now since the official establishment of OLLO Audio. Here's the S2 series, at the time made in our founder's dad's garage and only
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