Review on Sony SRS-XB23 Portable Speaker with IP67 Waterproof, Extra Bass, Bluetooth, Built-In Mic for Phone Calls - Black (SRSXB23/B) XB23 by Virot Ngeonkham ᠌

Successful development: clear, deep sound; frequency range; high volume without ringing; convenient external control; stable connection. And of course the build is good. Some pros: Gorgeous, clear sound. I have not seen columns of this format. At full volume, it sounds unstoppable, with no ringing or rattling, the bass is a little dampened by the firmware. By adjusting the full bass and boosting the EQ in the app, great low tones are extracted, really like 20 Hz. Hand buzz is felt. The assembly is on top, everything is tightly rubberized (except for the usb socket, of course), it looks very concise, even elegant. The BT-5 communication module is good, keeps the signal through concrete walls, without loss of quality and interference (the battery sits down great faster). Has some cons No control from a PC: you need a smartphone forcibly to ate the firmware and some other (useful) settings through a proprietary application. No wired aux connection.