Sound quality: Harman Kardon's Onyx Studio 3 had good overall sound quality. Bass has good impact and goes fairly deep but is boomy and is somewhat pronounced. Midrange is somewhat even but a bit muffled and grainy. Treble is a bit recessed and upper treble is rolled off. Does a so-so job of recovering room ambience; overall sound is somewhat hazy and lacks some detail. No significant difference between Bluetooth and wired sound quality. The unit provides a decent volume level in a medium to large sized room.
Ease of use: We found the Harmon Kardon Onyx Studio 3 ease of use to be very good overall. Bluetooth pairing was excellent as the device is always in pairing mode when not paired. The volume controls are prominent and high contrast (+/-) buttons and has a max volume indicator. Switching between sources - No switch, Bluetooth has priority over line-in audio where Bluetooth needs to be paused or stopped (does not need to be disconnected) for line-in to play. Aux jack has low contrast labeling.
