Short answer: the Harman Kardon Go + Play 3 for the higher ranking, the ZZA K8 for the lower price. The Harman Kardon Go + Play 3 ranks #3 of 70 boombox speakers at $385. The ZZA K8 ranks #47 at $40, $345 cheaper.
What the Harman Kardon Go + Play 3 gets right: Warm sound with boosted bass. Set against that: Just a little over half as loud as the higher rated boomboxes.
On the ZZA K8 side: Completely insane value for the money. The catch: Very V curve frequency response, can be harsh in the treble range.
Buy the Harman Kardon Go + Play 3 if the ranking matters more than the price. Buy the ZZA K8 if the price matters more than the ranking.
Specifications Side By Side
| Harman Kardon Go + Play 3 | ZZA K8 | |
|---|---|---|
| Price | $385 | $40 after clipped coupon |
| Ranked | #3 of 70 in Boombox Size Portable Bluetooth Speakers | #47 of 70 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Harman Kardon One app) | No |
| Aux Latency | 112ms | - |
| Bass Extension (-10dB) | 35Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | ~30 hours (Manufacturer specified) |
| Built in Microphone | Yes | No |
| EQ | Yes (App EQ) | No |
| IP Rating | None | IPX6 |
| Bluetooth Latency | 120ms | - |
| Max Volume | 103dB | - |
| Power Input | AC Power brick | USB-C |
| Stereo | Yes | Yes |
| TWS | Yes | Yes |
| Weight | 10.4 lbs / 4.7 kg | 6.8 lbs / 3.1 kg |
| Bluetooth Codecs | SBC, AAC | SBC |
| Power Bank | Yes | Yes |
| Party Mode | No | No |
| USB Playback | No | No |
| Bluetooth Version | 5.2 | - |
| Output Power | 160W RMS | Specs not available |
| Dimensions | 17.28" x 9.45" x 7.56" (439 x 240 x 192 mm) | Dimensions not available |
| Aux Input | Yes | Yes |
| Drivers | 1x 130mm (5") subwoofer + 2x 70mm midrange drivers + 2x 20mm tweeters | 8" woofer + tweeters |
| Aux Output | - | Yes |
| Microphone Input | - | Yes |
| Wireless Microphones | - | Yes 2 Included |
| FM Tuner | - | No |
The Two Speakers In Full
Harman Kardon Go + Play 3: $385 Amazon Ebay Refurbished
Pros: Warm sound with boosted bass. Deepest bass out of any speaker in this size. Sound is more natural than the Go + Play2.
Cons: Just a little over half as loud as the higher rated boomboxes. Only 8 hours of battery at medium volume. No water rating.
Setup: Use the hidden EQ modes to adjust the bass up when outside and down when inside. To adjust bass, quickly press the bluetooth and volume down buttons together, the number of light flashes tell you what mode you’re in. To adjust treble, quickly press the volume up and phone buttons at the same time, the number of yellow flashes on the light tell you what mode you are in.
| App | Yes (Harman Kardon One app) |
|---|---|
| Aux Input | Yes |
| Aux Latency | 112ms |
| Bass Extension (-10dB) | 35Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Latency | 120ms |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Dimensions | 17.28" x 9.45" x 7.56" (439 x 240 x 192 mm) |
| Drivers | 1x 130mm (5") subwoofer + 2x 70mm midrange drivers + 2x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Max Volume | 103dB |
| Output Power | 160W RMS |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 10.4 lbs / 4.7 kg |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Harman Kardon Go+ Play 3 vs Go Play 2, the holy grail has arrived? ✔
- Alan Ross Reviews: Harman Kardon Go + Play 3 hidden eq modes - world has gone crazy! 🤣
- Alan Ross Reviews: Minirig 2.1 or the Brane X or the Harman Kardon Go Play 3?
- Alan Ross Reviews: JBL Distortion Fest vs my favorite speaker today! I wasn’t expecting this!
- Mateusz Cholewa: BOGASING S8 Pro Max „HiFi” 🎶🧐🆚 Harman Kardon Go Play 3 „HiFi”🔊
- Oluv Patreon: Harman Kardon go+play 3 - best sounding?
- Oluv Patreon: Harman Kardon go+play 3 vs Tribit Stormbox Blast - outdoor soundtest
- Oluv Patreon: Harman Kardon go+play 3 vs JBL Xtreme 4 - first impressions
- Head-to-Head Comparisons
- Harman Kardon Go + Play 3 vs JBL Partybox Encore 2
- Harman Kardon Go + Play 3 vs Tribit Stormbox Blast
- Harman Kardon Go + Play 3 vs Earfun Uboom X
- Harman Kardon Go + Play 3 vs JBL Partybox Encore Essential 2
- Harman Kardon Go + Play 3 vs Zealot ZE41
- Harman Kardon Go + Play 3 vs JBL Boombox 4
- Harman Kardon Go + Play 3 vs Harman Kardon Go + Play 2
- Harman Kardon Go + Play 3 vs JBL Boombox 3 Wifi
- See all 13 comparisons
- Links
ZZA K8: $40 after clipped coupon Amazon
Pros: Completely insane value for the money. Comes with 2 metal body wireless microphones that are USB-C chargeable. Comes with Chinese labeled infrared remote control. Has voice delete function that works quite well. Adjustable microphone reverb. Pretty good build quality. The default EQ is the most balanced, the other two sound muffled.
Cons: Very V curve frequency response, can be harsh in the treble range. Treble is boosted a good +10dB. Midbass is recessed. Slight distortion issue at all volume levels due to the bass high pass filter being set too low
| App | No |
|---|---|
| Aux Input | Yes |
| Aux Output | Yes |
| Battery Life | ~30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Dimensions | Dimensions not available |
| Drivers | 8" woofer + tweeters |
| EQ | No |
| FM Tuner | No |
| IP Rating | IPX6 |
| Microphone Input | Yes |
| Output Power | Specs not available |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 6.8 lbs / 3.1 kg |
| Wireless Microphones | Yes 2 Included |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.