The headset is very well made and visually gives a high quality impression. I do not think that he is conspicuously large. Of course, the built-in 4 miniature loudspeakers need your space, but in my ears seemed the triple.fi 10 bulkier lot.
Accessories are plentiful, so you can customize him well to each ear should.
Sonically it is my preference very accommodating, he plays accurate, detailed, with good bass. It is striking for a inear how wide he can represent the soundstage. The here partly criticized bathtub vote so I can not, the supposedly annoying because at peak treble understand at all.
Who wants to have a striking example of this, please let the Denon AHD 600 for example, use (an over-ear headphones) for comparison.
Rather, it may be due to the sovereign, effortless way of Sony, for many hours without tiring listening to music.
My conclusion therefore: The Sony XBA 4 offers plenty of value for your money, is suitable for everyday use, makes her a lot visually is technically a treat and sounds really good.