Sound quality: Harman Kardon's Esquire 2 had fair overall sound quality. Bass has little impact, is subdued and lacks deep bass. Midrange is constricted and grainy. Treble is subdued and smeared, and upper treble is lacking. The Esquire 2 doesn't do a good job of recovering room ambience and is congested. Bluetooth and wired sound quality are similar. Provides a decent volume level in a small- to medium-sized room, but is better suited for near-field listening.
Ease of use: We found the Harman Kardon Esquire 2 ease of use to be very good overall. Bluetooth pairing requires a press of a well marked button on unit 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. Controls are prominent and labeling is high contrast. Volume control: There's nothing to indicate that it is a volume control except + and - symbols, no volume level markings and does not indicates when you reach the max or min settings. Works with line-in and Bluetooth inputs. Switching sources: Plug and unplug - Bluetooth has priority over line-in and must stop Bluetooth before line-in can play with a delay. Line-in jack is not labeled.