Sound quality: Harman Kardon's Onyx Studio 6 had Good overall sound quality. Bass has good impact and goes deep but is generally somewhat prominent and boomy, and can be very prominent with some program material. Midrange is fairly even but somewhat grainy, and slightly hazy. Treble is fairly extended but is somewhat subdued and smeared. Does a so-so job of recovering room ambience; overall sound is a bit congested and lacks fine detail. It's a monophonic speaker. There was no significant difference between Bluetooth and wired sound quality. Provides a decent volume level in a large sized room.
Ease of use: We found the Harman Kardon Onyx Studio 5 ease of use to be very good overall. Volume controls are low contrast, there is nothing to indicate that it is a volume control except + and - symbols. Bluetooth pairing requires a press of a low contrast button and then the selection of unit from Bluetooth selection list on source device; unit provides an obvious indication that the unit is in pairing mode as well as when pairing has actually occurred. Switching inputs: The Bluetooth input has priority over Line-in when plugged in must pause or stop Bluetooth for line in playback to start with slight or no delay. Aux input label is low contrast.
