One of the things that, it seems to me, separates headphone enthusiasts from traditional audiophiles is an interest in good inexpensive stuff, or devices with unusual utility. Think Koss Porta Pros or the Riva Turbo X. The Porta Pro has been delivering excellent sound quality for its very low $49 price for decades and for decades headphone enthusiasts have been praising their worth. And when the Riva Turbo X Bluetooth speaker showed up at CanJam a year or so ago, headphone hobbyists embraced it immediately as a great sounding portable speaker. These are cool little gadgets, and it seems to me headphone enthusiasts are more than willing to have a good hard look at them....no matter the cost.

MQA involves two fundamental concepts, discussed in a paper presented to the Audio Engineering Society in October 2014, the first responsible for a potential improvement in sound quality, the second responsible for a large reduction in the bandwidth required for storage and streaming of high-resolution files...