The Airpulse AU-4 is a premium, retro-style Bluetooth speaker that I’ve been using in my home office mostly connected to my iPad Pro. The build feels high quality, the physical bass/treble knobs make dialing in the sound easy, and the extra inputs (including quarter-inch) add real versatility for a desk setup.
Pros
+Fantastic vintage design and premium build quality
+Physical bass and treble knobs for quick EQ adjustments
+Bluetooth 5.1 with Qualcomm aptX HD support on compatible devices
+Flexible inputs: 3.5mm aux and quarter-inch line input
+Compact size that fits easily on desks, shelves, or console tables
Cons
-No companion app for sound tuning
-Treble lacks some clarity and detail; sound leans warm
-No built-in battery, so it’s not portable
-No track skip controls (only play/pause)
-Ports and AC input placement can interrupt the clean look with cables