Short answer: the Vifa Helsinki for midrange and treble, the Sony ULT Field 7 for everything else. The Vifa is generally regarded as having the best midrange and treble of any battery powered Bluetooth speaker, but it has no TWS pairing and needs a hacked Vifa app to enable night mode to sound good. The Sony is called better sounding than the XG500, though its bass is still not as deep as the top ranked speakers.
What the Sony ULT Field 7 gets right: Better sounding than the XG500. The tradeoff: Still not as deep bass as the top ranked speakers.
On the Vifa Helsinki side: Generally regarded as the best midrange and treble sound quality of any battery powered Bluetooth speaker. The tradeoff: No TWS pairing, looks like a purse, requires a hacked Vifa app (Android only post #48) to enable night mode to sound good.
Buy the Sony ULT Field 7 at $400 for a boombox speaker, or the Vifa Helsinki at $449 for a large speaker instead.
If battery life is a priority, the Sony ULT Field 7 is rated for 30 hours versus 8 hours for the Vifa Helsinki.
If water resistance matters to you, the Sony ULT Field 7 at IP67 (brief submersion) holds up far better than the Vifa Helsinki at no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 7 | Vifa Helsinki | |
|---|---|---|
| Price | $400 | $449.00 |
| Ranked | #42 of 75 in Boombox Size Portable Bluetooth Speakers | #1 of 78 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | 48Hz |
| Battery Life | 30 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Guitar Input | Yes | - |
| IP Rating | IP67 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-A, 5V/1.5A) | No |
| Power Input | AC Power cord | AC Power brick |
| Stereo | Yes | Partially (shared woofer) |
| Omnidirectional | No | No |
| USB Playback | Yes | - |
| Weight | 13.9 lbs (6.3 kg) | 3.1 lbs (1.4 kg) |
| Bluetooth Codecs | SBC, AAC, LDAC | aptX, SBC |
| App | No | No (official app is broken, 3rd party android app only) |
| EQ | Yes (App + ULT button) | No |
| TWS | Yes | No |
| Built-in Microphone | Yes | Yes |
| Bluetooth Version | 5.2 | 4.1 |
| Dimensions | 20.2" x 8.8" x 8.7" (512 x 224 x 222 mm) | 6.1" x 8.3" x 2.8" (156 x 210 x 70 mm) |
| Amplifier Power | 100W | 50W |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters | 2x 50mm fullrange, 2x 66mm woofers + 2x passive radiators |
| Digital Aux Input | No | No |
| Frequency Response | - | 58Hz - 18kHz (Manufacturer specified) |
Related Speaker Comparisons
How Vifa Helsinki compares with other leading options:
- JBL Xtreme 5 vs Vifa Helsinki
- Tribit Stormbox Lava vs Vifa Helsinki
- Brane X vs Vifa Helsinki
- Minirig 4 with subwoofer vs Vifa Helsinki
- Soundcore Boom 2 vs Vifa Helsinki
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
Sony ULT Field 7: $400 Amazon eBay
Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).
Cons: Bass is limited by its ~52Hz specification. There is no companion app.
Full Sony ULT Field 7 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20.2" x 8.8" x 8.7" (512 x 224 x 222 mm) |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters |
| EQ | Yes (App + ULT button) |
| Guitar Input | Yes |
| IP Rating | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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Vifa Helsinki: $449.00 Amazon eBay
Pros: Generally regarded as the best midrange and treble sound quality of any battery powered Bluetooth speaker. Measured bass extension of 48Hz (-10dB).
Cons: No TWS pairing, looks like a purse, requires a hacked Vifa app (Android only post #48) to enable night mode to sound good. This one is hard to recommend generally these days: the Uboom L has 98% of the sound quality with more features and a much cheaper price. There are mentions that the 2022 “new” version of this speaker doesn’t sound as good as Vifa was purchased by a Chinese company and laid off all the great sound engineers in the Austria office.
Full Vifa Helsinki review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No (official app is broken, 3rd party android app only) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 48Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 6.1" x 8.3" x 2.8" (156 x 210 x 70 mm) |
| Drivers | 2x 50mm fullrange, 2x 66mm woofers + 2x passive radiators |
| EQ | No |
| Frequency Response | 58Hz - 18kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Partially (shared woofer) |
| TWS | No |
| Weight | 3.1 lbs (1.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Vifa Helsinki vs JBL Xtreme 5
- Vifa Helsinki vs Tribit Stormbox Lava
- Vifa Helsinki vs Brane X
- Vifa Helsinki vs Minirig 4 with subwoofer
- Vifa Helsinki vs Soundcore Boom 2
- Vifa Helsinki vs Marshall Stockwell 2
- Vifa Helsinki vs Soundcore Motion Boom
- Vifa Helsinki vs Bose SoundLink Max
- See all 39 comparisons