Short answer: the JBL Partybox Encore Essential for party sound, the Zealot S89 for value. The Encore Essential is a great sounding speaker with somewhat boosted bass, but only 6 hours at medium volume. The S89 is a great value for bass performance, play time and max volume in the boombox class, though it is on the heavy side.
Buy the JBL Partybox Encore Essential. It is rated higher for sound quality, and the $69.96 saving on the Zealot S89 is not enough to make up the difference.
There is a real battery-life gap here: the Zealot S89 is rated for 40 hours, the JBL Partybox Encore Essential only 6 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox Encore Essential | Zealot S89 | |
|---|---|---|
| Price | $329.95 | $259.99 |
| Ranked | #8 of 90 in Boombox Size Portable Bluetooth Speakers | #19 of 90 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (JBL PartyBox app) | No |
| Aux Input | Yes | Yes |
| Aux Latency | 17ms | - |
| Bass Extension (-10dB) | 38Hz | 36Hz |
| Battery Life | 6 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | No | No |
| EQ | Yes (3 band App EQ) | Yes (multiple modes) |
| IP Rating | IPX4 | IPX6 |
| Bluetooth Latency | 100ms | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/0.5A) | Yes (USB-A + USB-C) |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 13 lbs (5.9 kg) | 16.1 lbs (7.3 kg) |
| Bluetooth Version | 5.1 | 5.3 |
| Amplifier Power | 100W RMS | 250W |
| Dimensions | 10.9” x 12.9” x 11.5” (276 x 327 x 293 mm) | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 135mm woofer + 2x 44mm tweeters | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Digital Aux Input | No | No |
| Strap | No | No |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
More top alternatives to JBL Partybox Encore Essential:
- Tribit Stormbox Blast vs JBL Partybox Encore Essential
- Harman Kardon Go + Play 3 vs JBL Partybox Encore Essential
- JBL Partybox Encore 2 vs JBL Partybox Encore Essential
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore Essential
- JBL Partybox Encore Essential 2 vs JBL Partybox Encore Essential
Prices on this page were last checked October 2, 2026 at 10:18 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
JBL Partybox Encore Essential: $329.95 Amazon eBay
Newer model: the JBL Partybox Encore Essential 2, ranked higher, rated 4.3/5.
Pros: JBL Partybox Encore Essential uses 135mm woofer + 2x 44mm tweeters. Its 5.9 kg, claimed 6 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 110dB and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of 38Hz (-10dB).
Cons: Bass is limited by its 38Hz specification.
Full JBL Partybox Encore Essential review and specifications →
| Amplifier Power | 100W RMS |
|---|---|
| App | Yes (JBL PartyBox app) |
| Aux Input | Yes |
| Aux Latency | 17ms |
| Bass Extension (-10dB) | 38Hz |
| Battery Life | 6 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 100ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10.9” x 12.9” x 11.5” (276 x 327 x 293 mm) |
| Drivers | 135mm woofer + 2x 44mm tweeters |
| EQ | Yes (3 band App EQ) |
| IP Rating | IPX4 |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/0.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13 lbs (5.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL giving it to us large! The good, The bad, The diabolical! More from alanrossreviews →
- DLX Willington: Called It!🤣 JBL Partybox Encore VS Essential, with binaural sound sample. More from DLXWillington →
- Jay’s Straight Up Reviews & More: Triple Threat 💸 $200 Challenge 🔋 Soundcore Rave Party 2, W-King H10, JBL Partybox Encore Essential More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Klipsch Gig XXL vs JBL Partybox Encore Essential (Pee-Wee) - Indoors, Plugged In🔌 Bluetooth Speakers
- Head-to-Head Comparisons
- JBL Partybox Encore Essential vs Aiwa Exos-9
- JBL Partybox Encore Essential vs JBL Partybox Encore
- JBL Partybox Encore Essential vs JBL Partybox Encore Essential 2
- JBL Partybox Encore Essential vs Vifa Copenhagen 2.0
- JBL Partybox Encore Essential vs Yeahbox Sonic Boom Ultra
- JBL Partybox Encore Essential vs JBL PartyBox On-The-Go 2 Plus
- JBL Partybox Encore Essential vs JBL Partybox Encore 2
- JBL Partybox Encore Essential vs Harman Kardon Onyx Studio 8
- See all 76 comparisons
Zealot S89: $259.99 Amazon AliExpress eBay
Pros: A 7.3kg boombox with a claimed 36Hz bass extension, 40-hour battery life, IPX6 protection, USB-C charging, aux, USB and microSD playback, TWS and multi-speaker PartyAdd. Listener comparisons find it capable of very high output and substantial bass for outdoor use. A great value for its bass, battery life and maximum volume. Measured bass extension of 36Hz (-10dB).
Cons: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers. The heavy cabinet and basic finish also make it less polished for daily portability, while its multiple EQ modes cannot substitute for a genuinely neutral tuning.
Full Zealot S89 review and specifications →
| Amplifier Power | 250W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.1 lbs (7.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test More from Oluv’Sone →
- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max3 - outdoor test
- Dominik Reviews: Zealot S89 vs JBL Boombox 4 - JBL Alternative? Sound Test More from Dominik Reviews →
- Jagist reviews: Jbl Boombox 4 Vs Zealot S89!!! More from Jagistreviews →
- Techder Audios: ZEALOT S89 VS ZEALOT ZE01 EXTREME POWERFULL VS COMPACTER BASS PERFORMANCE! More from techderaudios →
- Head-to-Head Comparisons