*Review: techPowerUp (
http://www.techpowerup.com/reviews/Zalman/ZM-DS4F)*
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The headphone I will be taking a look at today was first displayed at Computex 2007. It is called the "Zalman ZM-DS4F" and represent Zalman's first approach on how to make an ultra transportable headset. With the ZM-DS4F Zalman has managed to fit two individual audio drives in each ear cup (one 40 mm PEI woofer and a 28 mm tweeter) into a small headset with ear cups that measure only 55 mm across!
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