The Sony SRS-XB13 isn't perfect but it is very cheap
Sony SRS-XB13 Bluetooth Speaker review
Sony SRS-XB13 Review: This Tiny Speaker Is Perfect for Travel
Sony SRS-XB100 Bluetooth speaker review
Sony SRS-XB13 EXTRA BASS Wireless Bluetooth Portable Lightweight Compact Travel Speaker, IP67 Waterproof & Durable for Outdoor, 16 Hour Battery, USB Type-C, Removable Strap, and Speakerphone, Taupe : Electronics
Sony SRS-XB13 Bluetooth Speaker — Extra Bass, Waterproof & Dustproof The Sony SRS-XB13 Bluetooth speaker is the perfect way to bring your music to life. With its EXTRA BASS technology, a passive radiator works with a full-range speaker to enhance low-end tones and boost your music. The result is an impressive sound quality that will fill any space with rich, powerful sound. This Sony speaker is also equipped with a sound diffusion processor that spreads sound in any space.
Sony Extra Bass Portable Compact IP67 Waterproof Bluetooth Speaker - SRSXB13 - Black
Compact speaker with multiway strap: The XB13 is durable and portable, and includes a specially engineered strap to make it easier to travel with.
Sony SRS-XB13 EXTRA BASS Wireless Waterproof Speaker - Light Blue
Sony SRS-XB13 5W Bluetooth Speaker Price in India 2024, Full Specs & Review
29 best portable bluetooth speakers of 2023
Sony's small but mighty XB100 speaker is cheerful and very cheap - The Verge
Best Bluetooth Speaker for 2024 - CNET