Short answer: the JBL Partybox Encore Essential 2 if sound quality matters most, the Zealot S78 if price matters most. The JBL Partybox Encore Essential 2 ranks #5 of 73 boombox speakers at $239. The Zealot S78 ranks #73 at $159.68, $79.32 cheaper.
What the JBL Partybox Encore Essential 2 offers: Appears to have better off axis performance due to the move to dome tweeters over cone. A little less rolled off in the highs than the first Encore. Goes slightly deeper than the old Encore. Better battery life than the first Encore. Watch for: Missing a little bit of upper bass. No wireless Microphones like the non-Essential
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 JBL Partybox Encore Essential 2 when sound quality outweighs the price for you, and the Zealot S78 when the price outweighs sound quality instead.
The Zealot S78 is not a sound-quality pick. It sits near the bottom of the 73 boombox speakers; there are better options higher up.
Battery life favors the Zealot S78: rated for 40 hours against 15 hours for the JBL Partybox Encore Essential 2.
There is a real gap in water resistance: the Zealot S78 at IP67 (brief submersion) against the JBL Partybox Encore Essential 2, which has IPX4 (splashing).
Specifications Side By Side
| JBL Partybox Encore Essential 2 | Zealot S78 | |
|---|---|---|
| Price | $239.00 | $159.68 |
| Ranked | #5 of 73 in Boombox Size Portable Bluetooth Speakers | #73 of 73 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (JBL PartyBox app) | No |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Built in Microphone | No | No |
| EQ | Yes (7 band App EQ) | Yes (multiple modes) |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 13.7 lbs / 6.2 kg | 9.7 lbs / 4.4 kg |
| Wireless Microphones | No | - |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.4 | - |
| Output Power | 100W RMS | 120W RMS / 150W peak |
| Dimensions | 12.6" x 13.5" x 10.3" (319.5 x 342 x 260.4 mm) | 16.1" x 6.6" x 7.3" (410 x 167 x 185 mm) |
| Drivers | 1x 135mm (5.25") woofer + 2x 20mm (0.75") dome tweeters | 2x ~120mm (4.72") woofers + 2x ~42mm tweeters + 2x passive radiators |
| Max Volume | 110dB | - |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
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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
JBL Partybox Encore Essential 2: $239.00 Amazon B&H Photo Video eBay
Pros: Appears to have better off axis performance due to the move to dome tweeters over cone. A little less rolled off in the highs than the first Encore. Goes slightly deeper than the old Encore. Better battery life than the first Encore.
Cons: Missing a little bit of upper bass. No wireless Microphones like the non-Essential
Full JBL Partybox Encore Essential 2 review and specifications →
| App | Yes (JBL PartyBox app) |
|---|---|
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 12.6" x 13.5" x 10.3" (319.5 x 342 x 260.4 mm) |
| Drivers | 1x 135mm (5.25") woofer + 2x 20mm (0.75") dome tweeters |
| EQ | Yes (7 band App EQ) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Max Volume | 110dB |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Output Power | 100W RMS |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.7 lbs / 6.2 kg |
| Wireless Microphones | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Partybox Encore Essential 2 vs JBL Partybox Encore
- JBL Partybox Encore Essential 2 vs JBL Partybox Encore 2
- JBL Partybox Encore Essential 2 vs JBL Partybox Encore Essential
- JBL Partybox Encore Essential 2 vs Harman Kardon Go + Play 3
- JBL Partybox Encore Essential 2 vs Tribit Stormbox Blast
- JBL Partybox Encore Essential 2 vs Earfun Uboom X
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 8
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 6
- See all 46 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 →
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