Short answer: the Harman Kardon Go + Play 2 on measured sound quality, the Zealot S78 on price. The Harman Kardon Go + Play 2 ranks #18 of 73 boombox speakers at $350. The Zealot S78 ranks #73 at $159.68, $190.32 cheaper.
What the Harman Kardon Go + Play 2 offers: Warm sound with boosted bass. Watch for: Not as loud as others. No water rating.
What the Zealot S78 offers: 120W RMS output with 150W peak power, exceptional 40-hour battery life, power bank function, IP67 waterproof, EQ with multiple modes, dual woofers with tweeters and passive radiators, MicroSD and USB playback, AUX input, TWS stereo pairing, USB-C charging Watch for: Gets distorted above 50%. Not much bass. Volume level fluctuates at high volume.
Buy the Harman Kardon Go + Play 2 when sound quality outweighs the price for you, and the Zealot S78 when the price outweighs sound quality instead.
Skip the Zealot S78 if sound quality matters to you. It ranks near the bottom of the 73 boombox speakers.
Battery life favors the Zealot S78: rated for 40 hours against 8 hours for the Harman Kardon Go + Play 2.
Water resistance is not close: the Zealot S78 is rated at IP67 (brief submersion), well ahead of the Harman Kardon Go + Play 2 at no water resistance.
Specifications Side By Side
| Harman Kardon Go + Play 2 | Zealot S78 | |
|---|---|---|
| Price | $350 Discontinued | $159.68 |
| Ranked | #18 of 73 in Boombox Size Portable Bluetooth Speakers | #73 of 73 in Boombox Size Portable Bluetooth Speakers |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 40Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| IP Rating | None | IP67 |
| Bluetooth Latency | 33ms | - |
| Max Volume | 99dB | - |
| Party Mode | Yes (Wireless Dual Sound) | No |
| Power Input | AC Power brick | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | Yes (multiple modes) |
| TWS | No | Yes |
| Power Bank | No | Yes (USB-A) |
| USB Playback | No | Yes |
| Built in Microphone | Yes | No |
| Output Power | 100W AC / 30W battery | 120W RMS / 150W peak |
| Dimensions | 20" x 9" x 9.5" (508 x 228.6 x 241.3 mm) | 16.1" x 6.6" x 7.3" (410 x 167 x 185 mm) |
| Drivers | 2x 90mm (3.5") woofers (front and rear firing) + 2x 20mm tweeters | 2x ~120mm (4.72") woofers + 2x ~42mm tweeters + 2x passive radiators |
| Weight | 5.3 lbs / 2.4 kg | 9.7 lbs / 4.4 kg |
| Discontinued | Yes | - |
| Digital Aux Input | No | No |
| Aux Input | - | Yes |
| MicroSD Playback | - | Yes |
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- Harman Kardon Onyx Studio 5 vs W-King D10
- Braven XXL 2 vs Zealot S78
- JBL Boombox 3 vs Zealot S78
Prices on this page were last checked August 27, 2026 at 10:09 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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The Two Speakers In Full
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
- Alan Ross Reviews: Harman Kardon Go+ Play 3 vs Go Play 2, the holy grail has arrived? ✔ More from alanrossreviews →
- Alan Ross Reviews: JBL Boombox 2 bass monster or the mature Harman Kardon Go+ Play 2 mini for bass?? 💥
- Alan Ross Reviews: Tribit Stormbox Blast or Harman Kardon Go+ Play 2 Mini by an old bloke!
- Alan Ross Reviews: Harman Kardon Go+ Play 2 mini or Onyx Studio 6 - best speaker for bass?
- Alan Ross Reviews: Soundcore Motion Boom Plus vs Harman Kardon Go+ Play 2 mini - party vs HiFi
- Alan Ross Reviews: Bag of Riddim vs Harman Kardon Go+ Play 2 - boom boom in da room! 🥳
- Alan Ross Reviews: HK Go+ Play vs Soundcore Motion Boom - biggest bass battle ever!!!!!!!!!!!!
- Reddit Search for Harman Kardon Go + Play 2 Review
- Head-to-Head Comparisons
- Harman Kardon Go + Play 2 vs Harman Kardon Onyx Studio 5
- Harman Kardon Go + Play 2 vs JBL Boombox 4
- Harman Kardon Go + Play 2 vs JBL Boombox 3 Wifi
- Harman Kardon Go + Play 2 vs Zealot S89
- Harman Kardon Go + Play 2 vs JBL Boombox 3
- Harman Kardon Go + Play 2 vs Zealot ZE21
- Harman Kardon Go + Play 2 vs Tribit Stormbox Blast 2
- Harman Kardon Go + Play 2 vs Zealot ZE41
- See all 49 comparisons
Zealot S78: $159.68 Amazon Aliexpress eBay
Pros: 120W RMS output with 150W peak power, exceptional 40-hour battery life, power bank function, IP67 waterproof, EQ with multiple modes, dual woofers with tweeters and passive radiators, MicroSD and USB playback, AUX input, TWS stereo pairing, USB-C charging
Cons: Gets distorted above 50%. Not much bass. Volume level fluctuates at high volume.
Full Zealot S78 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.1" x 6.6" x 7.3" (410 x 167 x 185 mm) |
| Drivers | 2x ~120mm (4.72") woofers + 2x ~42mm tweeters + 2x passive radiators |
| EQ | Yes (multiple modes) |
| IP Rating | IP67 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 120W RMS / 150W peak |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 9.7 lbs / 4.4 kg |
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: W-King X20 vs Zealot S78 Bluetooth Boombox Battle Outdoor Tailgater Special 🚗 Let the Whoopin’ Begin More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: DBSOARS F29 Max vs Zealot S78 🛜 (5B) Budget Bluetooth Boombox Basement Battle 🔊 Bass Modes Enabled
- Reddit Search for Zealot S78 Review
- Head-to-Head Comparisons