On the Mytek Clef website, they are promoting ordering the product ( the Clef). There is a note near the bottom of the page, saying it is back ordered until Dec. 1! So, perhaps we will find out soon, if indeed the Clef really exists, as a viable real product.
In the meanwhile, I have intensely examined the reviews of the new iFi XDSD mobile Bluetooth DAC and headphone amplifier. This is a very close competitor to the Clef! It has very good Bluetooth ( both Aptex and AAC)), decent power, a very good Burr Brown chip ( DAC functionality), a lot if inputs and outputs, and is fairly light and small. However, it is $399!
So, assuming the Clef is really now available, at $299, it is really a good value. Of course, no one has done in-depth reviews yet. Therefore, it is still theoretically a good value. However, based on the stellar build quality and sophistication of the rest of Mytek’s products, it seems reasonable that the Clef will eventually deliver on it’s promise.