Short answer: the Sony ULT Field 5, if you are buying new. The Dockin D Fine+ 2 ranks higher than it (#26 vs #41 of 78 large speakers, 4.1/5 vs 3.5/5) but is discontinued, so only consider it used; the Sony ULT Field 5 is still sold new at $198.
What the Dockin D Fine+ 2 gets right: Quite deep bass for the category. The tradeoff: Not as much midrange clarity as other top ranked speakers.
On the Sony ULT Field 5 side: IP67 rated, dustproof and water resistant. The tradeoff: Bass not as deep as others in the category, and sound quality overall is just okay.
Buy the Sony ULT Field 5 new; the Dockin D Fine+ 2 is no longer sold new, so it only makes sense as a used find.
If battery life is a priority, the Sony ULT Field 5 is rated for 25 hours versus 16 hours for the Dockin D Fine+ 2.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Dockin D Fine+ 2 | Sony ULT Field 5 | |
|---|---|---|
| Price | $150 Discontinued | $198 |
| Ranked | #26 of 78 in Large Size Portable Bluetooth Speakers | #41 of 78 in Large Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 45Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| EQ | Yes (Bass boost 3 steps) | Yes (App + ULT button) |
| IP Rating | IPX5 | IP67 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Power Bank | Yes | Yes (USB-C) |
| Power Input | USB-C | USB-C |
| TWS | Yes | Yes |
| Weight | 5.1 lbs (2.3 kg) | 7.3 lbs (3.3 kg) |
| App | No | Yes |
| Aux Input | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Built-in Microphone | Yes | Yes |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 12.2" x 4.1" x 4.1" (310 x 103 x 103 mm) | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) |
| Drivers | 2x tweeters, 2x midrange/bass drivers + 2x passive radiators | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| Amplifier Power | 50W | 27W |
| Digital Aux Input | No | No |
| Discontinued | Yes | - |
Related Speaker Comparisons
More top alternatives to Dockin D Fine+ 2:
- JBL Xtreme 5 vs Dockin D Fine+ 2
- Dockin D Fine+ 2 vs Soundcore Motion Boom
- Bose SoundLink Max vs Dockin D Fine+ 2
- JBL Xtreme 4 vs Dockin D Fine+ 2
- Sony ULT Field 5 vs Soundcore Motion X600
Prices on this page were last checked September 23, 2026 at 11:24 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
Dockin D Fine+ 2: $150 Discontinued eBay
Pros: Dockin D Fine+ 2 uses 2x tweeters, 2x midrange/bass drivers + 2x passive radiators. Its 2.3 kg, claimed 16 hours (Manufacturer specified) battery life, IPX5 protection, aux input, up to 96dB and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of 45Hz (-10dB).
Cons: Bass is limited by its 45Hz specification. There is no companion app. Discontinued.
Full Dockin D Fine+ 2 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.2" x 4.1" x 4.1" (310 x 103 x 103 mm) |
| Discontinued | Yes |
| Drivers | 2x tweeters, 2x midrange/bass drivers + 2x passive radiators |
| EQ | Yes (Bass boost 3 steps) |
| IP Rating | IPX5 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.1 lbs (2.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Dockin D Fine+ 2 vs Soundcore Motion Boom 50w vs 30w 😱 More from alanrossreviews →
- Alan Ross Reviews: Dockin d fine plus 2 v w king d8 budget boombox - 2020 50 watt speakers
- Alan Ross Reviews: Dockin D Fine+ 2 - overview - specs - sound test
- Alan Ross Reviews: Dockin d fine+ mk2 stereo test - two Dockin Speakers - wow!
- Alan Ross Reviews: Sony xb43 JBL Xtreme 2 W-King d8 Dockin D Fine
- Head-to-Head Comparisons
Sony ULT Field 5: $198 Amazon eBay
Pros: A tough 3.3kg portable with IP67 protection, LDAC/AAC support, aux input, a 10-band app EQ, Party Connect, USB-C power-bank output and a claimed 25-hour battery. Reviews find it energetic and dynamic with substantial bass, enough volume for a yard, and two ULT modes that let bass-focused listeners choose a deeper or punchier presentation.
Cons: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth. Deep bass is less authoritative than the enclosure suggests, and the loud confirmation tone when pressing the ULT button is an unnecessary annoyance. Use the app EQ and audition it before buying for detail-focused music.
Full Sony ULT Field 5 review and specifications →
| Amplifier Power | 27W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 7.3 lbs (3.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Danny Pops: Don’t TOUCH that ULT Button! Sony ULT Field 5 Review More from DannyPops →
- Mark Ellis Reviews: Sony just changed summer sound 🤨 | Sony ULT Field 5 & 3 Review
- Dominik Reviews: Sony ULT Field 5 vs JBL Xtreme 4 - Outdoor Sound Test - Sony shines or not? More from Dominik Reviews →
- Joy & Oluv’Sone: Sony ULT Field 5 vs Anker SoundCore Boom 2 - listening test More from Oluv’Sone →
- Head-to-Head Comparisons