Musical Fidelity X-CAN v8
Beware of the Musical Fidelity X-CANv8.
It doesn't have sufficient power (current & voltage) to drive either low impedence, or high impedence headphones to reasonable volumes, without hiss / noise... without a using a pre-amp / line stage, or exceptionally high gain signal output from your source.
Think... like... 75% to 100% POT setting to achieve reasonable volume with noise / hiss in the background.
Tested this headphone amp with 5 different sources, and 5 different "top quality" headphones - with the same results.
Retailer says its performing up to MF specs - so I returned it for a refund.
Beware... avoid this amp... until MF releases an updated version.