Sound quality: ION's Plunge had Fair overall sound quality. Bass has little impact, is somewhat subdued, and lacks deep bass. Midrange is somewhat nasaland grainy. Treble is prominent and sizzly and upper treble is muted. Doesn't do a good job of recovering room ambience and is a congested. No significant difference between Bluetooth and wired sound quality. Provides a decent volume level in a small to medium sized room.
Ease of use: We found the Ion Plunge 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. When powered up the unit is always in pairing mode when not already paired, shows a pairing mode indicator. Indicates when pairing mode has occurred and never times out. Switching sources involves plug and unplug - The line input has priority over Bluetooth when plugged in with slight or no delay. Unambiguous. Aux input label is high contrast.