Check the listing for details. JBL Authentics 300 Bluetooth Home Speaker - White. Color: White, Condition: New. Listed at 349.95 USD. Mid-century JBL Authenticity in a Portable Shell A glance at the Authentics 300 home speaker harkens back to a golden era of JBL audio assembly. After hearing its rich stereo sound for the first time, however, Sweetwater audiophiles discovered it bore much more than a handsome figure. Boasting dual 0.98-inch tweeters and a single 5.25-inch woofer, the Authentics 300 delivers superb room-filling audio covering an impressively wide 45Hz-20kHz frequency range. To boot, onboard automatic self-tuning calibrates your audio every time you connect, ensuring the optimal output for your environment. If you prefer to take your sound into your own hands, the JBL One app offers near-limitless control over EQ, playlist, and voice assistant options for instant changes to your audio.