Short answer: the JBL Authentics 300. It ranks #46 of 113 boombox speakers by sound quality, rated 3.5/5, at $299.95. The Gemini GGO-650L ranks #86, rated 2.5/5, at $99.95, $200 cheaper, a saving that is not big enough to make up the sound-quality gap.
The JBL Authentics 300 is the better-sounding, deeper-bass option. A retro styled smart speaker with both Alexa and Google Assistant, a leather handle and battery power. Its bass reaches about 45Hz before falling 10dB, against 56Hz for the Gemini GGO-650L. It links with other speakers (Wi-Fi Multi-Room), which the Gemini GGO-650L cannot. It has an adjustable EQ, which the Gemini GGO-650L lacks. The tradeoff: Narrow sounding, bass not as deep as others.
The Gemini GGO-650L is the tougher pick. An inexpensive stereo party speaker with a big woofer, water resistance and a 10 hour battery. It is rated IPX5, while the JBL Authentics 300 has no water resistance. It keeps a wired aux input, which the JBL Authentics 300 lacks.
Buy the JBL Authentics 300. It is rated higher for sound quality, and saving $200 with the Gemini GGO-650L does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| JBL Authentics 300 | Gemini GGO-650L | |
|---|---|---|
| Price | $299.95 | $99.95 |
| Ranked | #46 of 113 in Boombox Size Portable Bluetooth Speakers | #86 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Bass Extension (-10dB) | 45Hz | ~56Hz |
| Battery Life | 8 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | No |
| IP Rating | None | IPX5 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wi-Fi Multi-Room) | No |
| Power Input | AC Power cable | USB-C |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 10.8 lbs (4.9 kg) | 9.3 lbs (4.2 kg) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Power Bank | No | No |
| USB Playback | Yes | Yes |
| Built-in Microphone | Yes | Yes |
| MicroSD Playback | No | Yes |
| Aux Input | No | Yes |
| Amplifier Power | 100W | 100W |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) | 11.8” x 9.1” x 15” (300 x 230 x 380 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators | 6.5” woofer + tweeter |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Strap | No | - |
| FM Tuner | - | Yes |
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