Short answer: the Marshall Bromley 450, if you are buying new. The Sony SRS-XP700 ranks higher than it (#14 vs #24 of 44 party speakers, 4.0/5 vs 3.7/5) but is discontinued, so only consider it used; the Marshall Bromley 450 is still sold new at $649.95.
Why pick the Sony SRS-XP700: Dual 6.69” woofers, multi-tweeter X-Balanced Speaker Units with rear tweeter for 360 effect. It supports LDAC Bluetooth, which the Marshall Bromley 450 lacks. The catch: Weird midrange peak.
The Marshall Bromley 450 is the longer-running, lighter choice. A balanced, warm sound with a flat midrange that keeps vocals and instruments clear, plenty of bass rumble and enough treble for energetic vocals, per RTINGS’ lab tests. It is rated for 40 hours of battery against 25 for the Sony SRS-XP700. At 27.1 lbs (12.3 kg) it weighs noticeably less than the Sony SRS-XP700 at 37.3 lbs (16.9 kg). It is rated IP55, while the Sony SRS-XP700 has no water resistance. Watch for: It is the quietest of its rivals: both the Soundboks Mix and Teufel Rockster Air 2 play louder, and near max volume the bass recedes and the sound gets less composed.
Buy the Marshall Bromley 450 new; the Sony SRS-XP700 is no longer sold new, so it only makes sense as a used find.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony SRS-XP700 | Marshall Bromley 450 | |
|---|---|---|
| Price | $314.95 Discontinued | $649.95 |
| Ranked | #14 of 44 in Party Size Portable Bluetooth Speakers | #24 of 44 in Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Bass Extension (-10dB) | 50Hz | - |
| Battery Life | 25 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | LDAC, AAC, SBC | SBC, AAC, LC3 |
| Bluetooth Version | 5.0 | 5.3 |
| Charging Time | 3 hours | 3.5 hours |
| Dimensions | 12.3” x 27.3” x 14.4” (313 x 693 x 367 mm) | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) |
| EQ | Yes | Yes |
| Guitar Input | Yes | Yes |
| IP Rating | None | IP55 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (2x XLR/6.35mm combo) |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (Auracast) |
| Power Bank | Yes (USB-A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Stereo | Partially | Yes |
| Omnidirectional | No | Yes |
| TWS | No | No |
| USB Playback | Yes | No |
| Weight | 37.3 lbs (16.9 kg) | 27.1 lbs (12.3 kg) |
| Amplifier Power | 78W RMS | 400W |
| Drivers | 2x 170mm woofers + 3x 60mm front tweeters + 1x 50mm rear tweeter | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | Yes |
| Strap | No | No |
| Frequency Response | - | 42Hz - 20kHz (Manufacturer specified) |
| Removable Battery | - | Yes |
| XLR Input | - | Yes (2x combo) |
| Built-in Microphone | - | No |
| Wi-Fi | - | No |
| Wheels | - | No |
Related Speaker Comparisons
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- Sony ULT Tower 7 vs Sony SRS-XP700
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- JBL Partybox Stage 320 vs Sony SRS-XP700
- JBL Partybox 310 vs Sony SRS-XP700
- Sony ULT Tower 5 vs Sony SRS-XP700
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
Sony SRS-XP700: $314.95 Discontinued Amazon eBay
Pros: Dual 6.69” woofers, multi-tweeter X-Balanced Speaker Units with rear tweeter for 360 effect. Exceptional 25-hour battery (18-22 hours real-world with LEDs). IPX4 splash-resistant. MEGA BASS for deep punchy sound. Karaoke (mic + guitar inputs), LED lights with stroboscopic effect. Sony Music App integration for microphone control and advanced settings. Measured bass extension of 50Hz (-10dB).
Cons: Weird midrange peak. Slightly less loud than a Partybox 310. Bass not as deep as a Partybox 310/300/110/100. Discontinued.
Full Sony SRS-XP700 review and specifications →
| Amplifier Power | 78W RMS |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | 50Hz |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | LDAC, AAC, SBC |
| Bluetooth Version | 5.0 |
| Charging Time | 3 hours |
| Digital Aux Input | No |
| Dimensions | 12.3” x 27.3” x 14.4” (313 x 693 x 367 mm) |
| Drivers | 2x 170mm woofers + 3x 60mm front tweeters + 1x 50mm rear tweeter |
| EQ | Yes |
| Guitar Input | Yes |
| IP Rating | None |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power cord |
| Stereo | Partially |
| Strap | No |
| TWS | No |
| USB Playback | Yes |
| Weight | 37.3 lbs (16.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony SRS-XP700 vs Sony SRS-XP500
- Sony SRS-XP700 vs Zealot PT21
- Sony SRS-XP700 vs Sony SRS-XV500
- Sony SRS-XP700 vs Onn XL Wireless Party Speaker
- Sony SRS-XP700 vs Onn Large Party gen 2
- Sony SRS-XP700 vs JBL Partybox 300
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- Sony SRS-XP700 vs JBL Partybox 110
- See all 39 comparisons
Marshall Bromley 450: $649.95 Amazon B&H Photo Video eBay
Pros: A balanced, warm sound with a flat midrange that keeps vocals and instruments clear, plenty of bass rumble and enough treble for energetic vocals, per RTINGS’ lab tests. Drivers on all four sides keep the tonal balance nearly the same from any angle, and M1M Tech Channel found it more open and airy than the Soundboks Mix and Teufel Rockster Air 2, with deeper bass than both. RTINGS measured 18.8 hours of battery from a swappable LiFePO4 pack shared with the Bromley 750, and it adds IP55 protection, two XLR/6.35mm combo inputs, USB-C audio, Auracast and physical bass and treble knobs.
Cons: It is the quietest of its rivals: both the Soundboks Mix and Teufel Rockster Air 2 play louder, and near max volume the bass recedes and the sound gets less composed. The warm tuning lacks some fine treble detail. There is no graphic EQ, only bass and treble knobs, and its stereo spreads left and right channels around the cabinet, so panned elements can land on the wrong side. At 12.3 kg it has a carry handle but no wheels.
Full Marshall Bromley 450 review and specifications →
| Amplifier Power | 400W |
|---|---|
| App | Yes (Marshall Bluetooth app) |
| Aux Input | Yes (3.5mm, RCA) |
| Battery Life | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Charging Time | 3.5 hours |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) |
| Drivers | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators |
| EQ | Yes |
| Frequency Response | 42Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | IP55 |
| Lights | Yes |
| Microphone Input | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | Yes |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Removable Battery | Yes |
| Stereo | Yes |
| Strap | No |
| TWS | No |
| USB Playback | No |
| Weight | 27.1 lbs (12.3 kg) |
| Wheels | No |
| Wi-Fi | No |
| XLR Input | Yes (2x combo) |
- Links
- Reviews, Comparisons and Sound Samples
- RTINGS: Marshall Bromley 450 Review More from Rtings.com →
- M1M Tech Channel: The best in its class? Marshall Bromley 450 vs. Soundboks & Teufel More from M1MTechChannel →
- HeadphoneCheck: Marshall Bromley 450 test
- Tom’s Guide: Marshall Bromley 450 vs Bromley 750 face-off
- Smart Home Sounds: Marshall Bromley 450 review More from Smart Home Sounds →
- Storytripper HD: JBL Partybox 120 vs Marshall Bromley 450 (Indoor) More from storytripperhd →
- Storytripper HD: Marshall Bromley 450 vs Marshall Bromley 750 (outdoor)
- Storytripper HD: Marshall Woburn III vs Marshall Bromley 450
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