Short answer: the Minirig 3. It ranks #7 of 134 medium speakers at $140; the Sony ULT Field 3 ranks #57 and costs $148, so there is not much of a tradeoff to weigh.
The case for the Minirig 3: Modular, can easily attach a subwoofer. The tradeoff: Not stereo.
What the Sony ULT Field 3 gets right: IP67 rated, dustproof and water resistant. Set against that: Sounds a bit hollow, a bit boosted in the treble.
One note: the Minirig 3 is discontinued, but it still ranks #7 of 134 medium speakers, ahead of most of what is still sold new, so it is worth considering used.
Buy the Minirig 3 if the ranking matters more than the price. Buy the Sony ULT Field 3 if the price matters more than the ranking.
Specifications Side By Side
| Minirig 3 | Sony ULT Field 3 | |
|---|---|---|
| Price | $140 Discontinued | $148 |
| Ranked | #7 of 134 in Medium Size Portable Bluetooth Speakers | #57 of 134 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 53Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, AAC, SBC | SBC, AAC, LDAC |
| Built in Microphone | No | Yes |
| EQ | Yes | Yes (App + ULT button) |
| IP Rating | Splash resistant | IP67 |
| Bluetooth Latency | 60ms | - |
| Max Volume | 105dB | - |
| Power Bank | No | Yes |
| Power Input | Proprietary USB cable | USB-C |
| Stereo | No | Yes |
| TWS | Yes (Bluetooth or cable) | Yes |
| Weight | 1.2 lbs / 550 g | 2.6 lbs / 1.2 kg |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 4.0" diameter x 2.9" H (101.6 x 73mm) | 10.1" x 4.5" x 3.1" (256 x 113 x 79 mm) |
| Discontinued | Yes | - |
| Drivers | 70mm custom driver | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) | - |
| Output Power | 40W | 27W |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
The Two Speakers In Full
Minirig 3: $140 Discontinued Minirigs
Pros: Modular, can easily attach a subwoofer.
Cons: Not stereo. Calls itself splash resistant and has no official water rating. App is buggy. Wireless TWS pairing is buggy. A bit expensive. Has reliability issues more often than any other speaker. Discontinued.
| App | Yes |
|---|---|
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, AAC, SBC |
| Bluetooth Latency | 60ms |
| Bluetooth Version | 5.0 |
| Built in Microphone | No |
| Dimensions | 4.0" diameter x 2.9" H (101.6 x 73mm) |
| Discontinued | Yes |
| Drivers | 70mm custom driver |
| EQ | Yes |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) |
| IP Rating | Splash resistant |
| Max Volume | 105dB |
| Output Power | 40W |
| Power Bank | No |
| Power Input | Proprietary USB cable |
| Stereo | No |
| TWS | Yes (Bluetooth or cable) |
| Weight | 1.2 lbs / 550 g |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: B&O Beoplay A1 2nd gen vs Minirig mk3 bluetooth speaker
- Alan Ross Reviews: minirig 3 vs minirig 2 - minirig 3 overview part 1
- Speakertech: Anker soundcore Boost (Upgraded) vs minirig mini in stereo /2.0 (and changing the equalizer)
- Alan Ross Reviews: Minirig 4 vs Minirig 3, stuff they tell you, stuff they don’t! 😂
- Beautiful Zar DJ: MINIRIG 4 Vs MINIRIG 3 (50-100%Volume Audio Test)
- James from Canada: SOUND TESTS - Soundboks, Minirig 3, dB Technologies, Bose S1 Pro, etc - RAVE TEST
- Buy Used
- Head-to-Head Comparisons
- Links
Sony ULT Field 3: $148 Amazon
Pros: IP67 rated, dustproof and water resistant. 24 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone.
Cons: Sounds a bit hollow, a bit boosted in the treble.
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Dimensions | 10.1" x 4.5" x 3.1" (256 x 113 x 79 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Output Power | 27W |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.6 lbs / 1.2 kg |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 3 vs JBL Charge 6
- Sony ULT Field 3 vs Sony ULT Field 1
- Sony ULT Field 3 vs KEF Muo gen2
- Sony ULT Field 3 vs Marshall Emberton II
- Sony ULT Field 3 vs Minirig 2
- Sony ULT Field 3 vs Sony SRS-XE300
- Sony ULT Field 3 vs Tribit Stormbox Mini+
- Sony ULT Field 3 vs Turtlebox Ranger
- Sony ULT Field 3 vs Yamaha True X Speaker 1A
- Sony ULT Field 3 vs JBL Charge Essential 2
- Sony ULT Field 3 vs JBL Flip 7
- Sony ULT Field 3 vs JBL Flip Essential
- Sony ULT Field 3 vs Marshall Emberton III
- Sony ULT Field 3 vs Ultimate Ears Megaboom 3
- Sony ULT Field 3 vs Xiaomi Sound Party
- Sony ULT Field 3 vs Bose Soundlink Flex 2nd gen
- Sony ULT Field 3 vs Harman Kardon Luna
- Sony ULT Field 3 vs Huawei Sound Joy
- Sony ULT Field 3 vs JBL Charge 5
- Sony ULT Field 3 vs JBL Flip 6
- Sony ULT Field 3 vs Sonos Roam
- Sony ULT Field 3 vs Sonos Roam 2
- Sony ULT Field 3 vs Sony SRS-XB20
- Sony ULT Field 3 vs Sony XB33
- Sony ULT Field 3 vs Soundcore Boom 3i
- Sony ULT Field 3 vs Ultimate Ears Boom 3
- 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.