Short answer: the Sony ULT Field 7, if you are buying new. The Aiwa Exos-9 ranks higher than it (#9 vs #56 of 91 boombox speakers, 4.2/5 vs 3.2/5) but is discontinued, so only consider it used; the Sony ULT Field 7 is still sold new at $400.
The Aiwa Exos-9 is the better-sounding, deeper-bass choice. It still sounds great against current models. Its bass reaches about 44Hz before falling 10dB, against 52Hz for the Sony ULT Field 7.
The Sony ULT Field 7 is the longer-running, tougher option. It is rated for 30 hours of battery against 10 for the Aiwa Exos-9. It is rated IP67, while the Aiwa Exos-9 has no water resistance. It supports LDAC Bluetooth, which the Aiwa Exos-9 lacks. The catch: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the Sony ULT Field 7 if you want one new; the Aiwa Exos-9 is discontinued, so only look for it used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Aiwa Exos-9 | Sony ULT Field 7 | |
|---|---|---|
| Price | $250 Discontinued | $400 |
| Ranked | #9 of 91 in Boombox Size Portable Bluetooth Speakers | #56 of 91 in Boombox Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 44Hz | ~52Hz |
| Battery Life | 10 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (5-band graphic EQ + 4 presets) | Yes (App + ULT button) |
| IP Rating | None | IP67 |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Input | AC Power cable | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 15.2 lbs (6.9 kg) | 13.9 lbs (6.3 kg) |
| Power Bank | Yes (USB-A) | Yes (USB-A, 5V/1.5A) |
| USB Playback | No | Yes |
| FM Tuner | No | - |
| Microphone Input | Yes (with adapter) | Yes (Karaoke mode with echo effect) |
| Amplifier Power | 200W | 100W |
| Dimensions | 19.4” x 7.5” x 11.7” (492.8 x 190.5 x 297.2 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 6.5” dual voice coil woofer + 2x 3” midwoofers + 2x 1” silk dome tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 5.2 |
| Guitar Input | - | Yes |
| Strap | - | No |
Related Speaker Comparisons
More top alternatives to Aiwa Exos-9:
- Tribit Stormbox Blast vs Aiwa Exos-9
- JBL Partybox Encore 2 vs Aiwa Exos-9
- JBL PartyBox On-The-Go 2 Plus vs Aiwa Exos-9
- JBL Partybox Encore Essential 2 vs Aiwa Exos-9
- Aiwa Exos-9 vs JBL Partybox Encore
Prices on this page were last checked October 4, 2026 at 9:58 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
Aiwa Exos-9: $250 Discontinued eBay
Newer model: the Aiwa Exos-10, ranked lower, rated 3.5/5.
Pros: Aiwa Exos-9 uses 6.5” dual voice coil woofer + 2x 3” midwoofers + 2x 1” silk dome tweeters. Its 6.9 kg, claimed 10 hours (Manufacturer specified) battery life, aux input and stereo playback make it a practical option for its intended room or portable use. It still sounds great against current models. Measured bass extension of 44Hz (-10dB).
Cons: Bass is limited by its 44Hz specification. There is no companion app. Discontinued.
Full Aiwa Exos-9 review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 44Hz |
| Battery Life | 10 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 19.4” x 7.5” x 11.7” (492.8 x 190.5 x 297.2 mm) |
| Drivers | 6.5” dual voice coil woofer + 2x 3” midwoofers + 2x 1” silk dome tweeters |
| EQ | Yes (5-band graphic EQ + 4 presets) |
| FM Tuner | No |
| IP Rating | None |
| Microphone Input | Yes (with adapter) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power cable |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 15.2 lbs (6.9 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
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- Aiwa Exos-9 vs JBL Partybox Encore Essential 2
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Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
Smaller model: the Sony ULT Field 1 (rated 3.1/5).
Larger model: the Sony ULT Tower 10 (rated 3.9/5).
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
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