It almost feels like portable Bluetooth speakers are the new essential product category for consumer gadget makers. Every second day a new portable, weatherproof Bluetooth speaker seems to apparate from nothing onto our desks, waiting to be reviewed.Philips is not exempt from this desire to join the portable music trend. While Philips has a long history in speakers ? including its decent lineup of Fidelio Bluetooth units ? the BT6000 is the latest compact portable Bluetooth speaker from partner Gibson Innovations.At AU$179.95 (£89.95, approx US$130), the price tag falls in line with products like the Bose SoundLink Color, but significantly more than the cheapest options on the market. That's not necessarily a bad thing though, as its solid build quality and commendable sound output make it a true contender.DesignWhile the name of products like the UE Roll and the Bose Soundlink Color give you some idea of the product's design, the Philips BT6000 does no such thing.