These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox Encore 2 ranks #4 of 113 boombox speakers by sound quality at $330; the Sony ULT Field 5 ranks #59 of 120 large speakers by sound quality at $348.
The case for the JBL Partybox Encore 2: A compact karaoke party speaker with two wireless mics, better balanced sound than the original and a long battery. Watch for: It still lacks some upper-bass punch and cannot match the scale of the larger PartyBoxes.
The Sony ULT Field 5 is the longer-running, lighter choice. A tough, waterproof party speaker with loud, bass focused output, an aux input, a power bank and a long battery. It is rated for 25 hours of battery against 15 for the JBL Partybox Encore 2. At 7.3 lbs (3.3 kg) it weighs much less than the JBL Partybox Encore 2 at 14.1 lbs (6.4 kg). It is rated IP67 against IPX4 for the JBL Partybox Encore 2. Watch for: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth.
Buy the JBL Partybox Encore 2 ($330) for a boombox speaker; the Sony ULT Field 5 ($348) suits a large speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| JBL Partybox Encore 2 | Sony ULT Field 5 | |
|---|---|---|
| Price | $330 | $348.00 |
| Ranked | #4 of 113 in Boombox Size Portable Bluetooth Speakers | #59 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes (JBL PartyBox app) | Yes |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| Built-in Microphone | No | Yes |
| EQ | Yes (7 band App EQ) | Yes (App + ULT button) |
| IP Rating | IPX4 | IP67 |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 14.1 lbs (6.4 kg) | 7.3 lbs (3.3 kg) |
| Wireless Microphones | Yes 2 Included | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.4 | 5.3 |
| Amplifier Power | 100W RMS | 27W |
| Dimensions | 12.6” x 13.3” x 10.4” (319.5 x 338.6 x 263 mm) | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) |
| Drivers | 1x 135mm (5.25”) woofer + 2x 20mm (0.75”) dome tweeters | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Strap | No | Yes (detachable shoulder strap) |
| Bass Extension (-10dB) | 42Hz | - |
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