Short answer: the Harman Kardon Go + Play 2. It ranks #18 of 73 boombox speakers by sound quality at $350; the Turtlebox Grande ranks #54 and costs $730, so there is not much of a tradeoff to weigh.
What the Turtlebox Grande offers: 10-inch woofer. IP67 submersible shell with crush-proof ABS exterior. 158Wh battery provides ~3 days of playback. Bluetooth 5.4, party mode (100+ speakers). Watch for: They pretty much lie about all their specs and sound just okay in all youtube sound samples. Only 100w will never hit 126db at a reasonable measuring distance. Putting your db meter right against the speaker doesn’t count, 1 meter distance is the standard. Barely any bass for a 10” woofer. Overpriced and not worth it.
What the Harman Kardon Go + Play 2 offers: Warm sound with boosted bass. Watch for: Not as loud as others. No water rating.
Buy the Harman Kardon Go + Play 2. It ranks higher for sound quality than the Turtlebox Grande and costs less, so there is no real case for the other one.
If battery life is a priority, the Turtlebox Grande is rated for 25 hours versus 8 hours for the Harman Kardon Go + Play 2.
If water resistance matters to you, the Turtlebox Grande at IP67 (brief submersion) holds up far better than the Harman Kardon Go + Play 2 at no water resistance.
Specifications Side By Side
| Turtlebox Grande | Harman Kardon Go + Play 2 | |
|---|---|---|
| Price | $730.00 | $350 Discontinued |
| Ranked | #54 of 73 in Boombox Size Portable Bluetooth Speakers | #18 of 73 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | - |
| Bass Extension (-10dB) | ~55Hz | 40Hz |
| Battery Life | 25 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Built in Microphone | Yes | Yes |
| IP Rating | IP67 | None |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (Turtlebox Party Mode) | Yes (Wireless Dual Sound) |
| Power Input | USB-C | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 18.8 lbs / 8.53 kg | 5.3 lbs / 2.4 kg |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| Power Bank | Yes (USB-C) | No |
| USB Playback | No | No |
| Bluetooth Version | 5.4 | - |
| Output Power | 86W | 100W AC / 30W battery |
| Dimensions | 14" x 8.4" x 11.5" (355.6 x 213.4 x 292.1 mm) | 20" x 9" x 9.5" (508 x 228.6 x 241.3 mm) |
| Drivers | 1x 10" (254mm) woofer + 1x 1.25" (32mm) titanium tweeter | 2x 90mm (3.5") woofers (front and rear firing) + 2x 20mm tweeters |
| Digital Aux Input | No | No |
| Aux Latency | - | 0ms |
| Bluetooth Latency | - | 33ms |
| Max Volume | - | 99dB |
| Discontinued | - | Yes |
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Prices on this page were last checked August 25, 2026 at 6:19 AM 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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The Two Speakers In Full
Turtlebox Grande: $730.00 Amazon eBay
Pros: 10-inch woofer. IP67 submersible shell with crush-proof ABS exterior. 158Wh battery provides ~3 days of playback. Bluetooth 5.4, party mode (100+ speakers).
Cons: They pretty much lie about all their specs and sound just okay in all youtube sound samples. Only 100w will never hit 126db at a reasonable measuring distance. Putting your db meter right against the speaker doesn’t count, 1 meter distance is the standard. Barely any bass for a 10” woofer. Overpriced and not worth it.
Full Turtlebox Grande review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 14" x 8.4" x 11.5" (355.6 x 213.4 x 292.1 mm) |
| Drivers | 1x 10" (254mm) woofer + 1x 1.25" (32mm) titanium tweeter |
| EQ | No |
| IP Rating | IP67 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 86W |
| Party Mode | Yes (Turtlebox Party Mode) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 18.8 lbs / 8.53 kg |
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Harman Kardon Go + Play 2: $350 Discontinued eBay
Pros: Warm sound with boosted bass.
Cons: Not as loud as others. No water rating. Discontinued.
Full Harman Kardon Go + Play 2 review and specifications →
| App | No |
|---|---|
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 40Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 33ms |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20" x 9" x 9.5" (508 x 228.6 x 241.3 mm) |
| Discontinued | Yes |
| Drivers | 2x 90mm (3.5") woofers (front and rear firing) + 2x 20mm tweeters |
| EQ | No |
| IP Rating | None |
| Max Volume | 99dB |
| Omnidirectional | No |
| Output Power | 100W AC / 30W battery |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | No |
| USB Playback | No |
| Weight | 5.3 lbs / 2.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
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