Sony XBA-1 and XBA-4 added.
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Mid-09. Sony XBA-1 (
link)
Mellowed and specious mid centric sound with slight roll-off at both ends. Calling it a mid centric sound might be a bit misleading without further explanation – XBA-1 isn’t very strongly mid dominant or forward at all (hence ‘mellowed’), just that the mid range is the strength of its overall presentation - good texture and detail, not particular sweet in tone but good in vocal. Treble is decently crisp and clean, but rolls just a tiny bit off on the very top of the spectrum, over the 16kHz region. Bass extends decently low, but slowly rolls off in the sub-bass region. It is decent in quantity, but nothing that will appeal to basshead. The ‘visual’ reference of the frequency response will be best described as generally flat in the mid but tapered off at both ends. Soundstage is actually quite good since the overall presentation is a bit on the more mellowed and laid back side, which give a lot of space. As far as the whole presentation goes, XBA-1 is the kind that does nothing wrong, but also nothing spectacularly well. As a single BA, the level of performance is still very admirable and definitely some of the best among sub-$100 single BA.
Pro: Price. Build quality.
Con: None.
Warm+Sweet-08. Sony XBA-4 (
link)
Mellowed mid with a strong bass and better extended treble – warm, decently sweet, full bodied yet still good in soundstage. Bass reaches down to 20Hz easily, but deep end rumble isn’t very obvious due to the equally strong mid-bass region that gives more body than roar. Mid, as said, carries the same mellow’ish presentation that has good texture and detail but not particularly upfront. Treble extends all the way up and offer good sparkles and crispiness, mainly as a supporting role in the whole presentation rather than standing out as an element on its own. It can however sound a little metallic when the volume is turned too high. The good news is that it doesn’t have any sibilance issue at all, making it the first top-end Sony since EX700 that isn’t plagued by over-brightness and actually sounds rather smooth. Soundstage, like XBA-1, benefits from the same mellowed and laid back tuning and actually is pretty good as well. As a quad BA, XBA-4 technically isn’t quite as strong as other quad like the Westone 4 (which is almost US$300 more expensive). However, XBA-4 offers a very unique tuning of its own - reminiscence of a closed-back circumaural that is smooth, relaxing, and often musical – hours and hours of listening can easily go by without any stress on the listener, and that’s the strength of XBA-4.
Pro: Quad drivers. Build quality. First sibilance-less top Sony.
Con: Low impedance.