First of all I would like to thank Firestone Audio for sending me these products to review.
I shall start off with the GreenKey USB isolator. First of all, purchase information GreenKey USB Isolator – $102 / £50 / €59 – Available from:
Here are the pictures:
The USB isolator is a product I wasn’t expecting to change a great amount of audible sound, especially in a setup at my desk, which consists of my modded Denon AH-D2000, the DigiZoid ZO2 and an EHP-O2D. I was trying so hard, for such a long time to hear a difference, whilst using the EHP-O2D in DAC mode. No matter what I did, I couldn’t hear any difference whatsoever in sound. I tried different USB ports, both at the front and back of the PC and 2.0 and even 3.0 ports. I was just about to give up and say: “this product makes no difference”, until I turned on my DigiZoid ZO2 and decided to hook it up to the PC and charge it at the same time, whilst it was in operation. This is where I discovered a difference in sound with and without the GreenKey.
The Samsung Galaxy S III, is a USB OTG (on-the-go) compatible device, which means using a OTG adapter, will allow you to use the OTG functionalities on offer!
I didn’t have much to test with, nor have an expanded knowledge in OTG functionalities, however I had 3 things, which to me were the most important USB connections I could potentially use:
-The Logitech MX Revolution – Mouse
-The Logitech K350 – Keyboard
-The Kingston DT R500 – USB Stick
I thus set out to buy a USB OTG adapter – however most I found, that were confirmed OTG compliant, were wires and not portable at all.
I took the plunge, trusting myself on ebay, and bought myself this OTG Adapter – to my delight, when it came in, it worked perfectly with all the above 3.
My video should explain and show you my use of the OTG adapter with those devices. I should also point out, that there was a function that I missed out to show on the keyboard, and that is the volume up/down & mute button at the very top of my keyboard were working perfectly!