Devine MPS HA 100 Headphone Amplifier
I was unhappy with the poor sound quality on my headphones at first but then I realised the problem was with the instrument cable. Instrument cable that worked OK with my P.A. showed shortcomings with this headphone amplifier. I resolved this by getting a decent quality (short) instrument cable and a set of good headphone jack adaptors. I reckon I've spent about an extra fifteen quid on bits and pieces to run it and get a decent sound quality etc.