Short answer: the Sony ULT Field 7, if you are buying new. The Teufel Boomster 2021 ranks higher than it (#46 vs #56 of 90 boombox speakers, 3.4/5 vs 3.2/5) but is discontinued, so only consider it used; the Sony ULT Field 7 is still sold new at $400.
The case for the Teufel Boomster 2021: Pretty balanced sound, slightly warm. The tradeoff: Not as deep of bass as above ranked speakers. Boosted mid bass compensating for the lack of bass extension.
What the Sony ULT Field 7 gets right: Better sounding than the XG500. Watch for: Still not as deep bass as the top ranked speakers. 8kHz peak.
Buy the Sony ULT Field 7 if you want one new; the Teufel Boomster 2021 is discontinued, so only look for it used.
If battery life is a priority, the Sony ULT Field 7 is rated for 30 hours versus 18 hours for the Teufel Boomster 2021.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Teufel Boomster 2021 | Sony ULT Field 7 | |
|---|---|---|
| Price | €250 Discontinued | $400 |
| Ranked | #46 of 90 in Boombox Size Portable Bluetooth Speakers | #56 of 90 in Boombox Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| EQ | No | Yes (App + ULT button) |
| FM Tuner | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 8.3 lbs (3.75 kg) | 13.9 lbs (6.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | Yes (USB-A, 5V/1.5A) |
| USB Playback | No | Yes |
| Built-in Microphone | No | Yes |
| Power Input | USB-C | AC Power cord |
| Amplifier Power | 42W RMS | 100W |
| Dimensions | 14.6” x 7.1” x 5.8” (370 x 180 x 148 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 5.2 |
| Strap | No | No |
| Bass Extension (-10dB) | - | ~52Hz |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
Related Speaker Comparisons
How Teufel Boomster 2021 compares with other leading options:
- Harman Kardon Onyx Studio 7 vs Teufel Boomster 2021
- Harman Kardon Onyx Studio 9 vs Teufel Boomster 2021
- JBL Boombox 4 vs Teufel Boomster 2021
- Harman Kardon Go + Play 2 vs Teufel Boomster 2021
- Harman Kardon Onyx Studio 5 vs Teufel Boomster 2021
Prices on this page were last checked October 3, 2026 at 10:26 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
Teufel Boomster 2021: €250 Discontinued eBay
Newer model: the Teufel Boomster 4, ranked higher, rated 3.4/5.
Pros: Teufel Boomster 2021 uses 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters. Its 3.75 kg, claimed 18 hours (Manufacturer specified) battery life, IPX7 protection, aux input and stereo playback make it a practical option for its intended room or portable use.
Cons: There is no companion app. No EQ adjustment. Discontinued.
Full Teufel Boomster 2021 review and specifications →
| Amplifier Power | 42W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 14.6” x 7.1” x 5.8” (370 x 180 x 148 mm) |
| Drivers | 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters |
| EQ | No |
| FM Tuner | Yes |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 8.3 lbs (3.75 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Teufel Boomster 2021 vs Teufel Boomster 4
- Teufel Boomster 2021 vs onn Pro X Large Boom Boombox
- Teufel Boomster 2021 vs B&O Beolit 20
- Teufel Boomster 2021 vs JBL Authentics 300
- Teufel Boomster 2021 vs JBL Boombox 2
- Teufel Boomster 2021 vs Teufel Boomster NG (2017)
- Teufel Boomster 2021 vs Soundcore Boom 2 Plus
- Teufel Boomster 2021 vs Soundcore Rave Party 2
- See all 26 comparisons
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
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. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
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 | Yes |
| 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 |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 7 vs Skullcandy Barrel
- Sony ULT Field 7 vs Soundcore Rave Party 2
- Sony ULT Field 7 vs Yeahbox Sonic Boom Max 3
- Sony ULT Field 7 vs Teufel Boomster NG (2017)
- Sony ULT Field 7 vs Onn Medium Party Speaker Gen 2
- Sony ULT Field 7 vs JBL Partybox On the Go
- Sony ULT Field 7 vs Sony SRS-XG500
- Sony ULT Field 7 vs Gemini GRV-650L
- See all 76 comparisons