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thats a fair wedge for the sony (HAP-Z1ES) - Alto.... especially being it's going on for about 5 years old now - and you know how quickly technology moves on.....must be something more modern that can compete with it - likely for less money ?....anyway, a quality digi source of that level - next you'll be wanting a pair of B&W Nautilus to hear it through .....oh dear - matron !

perhaps sleep on it .....?