Short answer: the Marshall Kilburn II. It ranks #43 of 102 large speakers by sound quality (rated 3.8/5) at $279 and is still sold new; the Sony SRS-XG300 ranks #75 (rated 3.1/5) and is discontinued, so it is only an option used.
Buy the Marshall Kilburn II. It is rated higher for sound quality; the Sony SRS-XG300 is no longer sold new.
Water resistance is not close: the Sony SRS-XG300 is rated at IPX7 (brief submersion), well ahead of the Marshall Kilburn II at IPX2 (light drips).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Marshall Kilburn II | Sony SRS-XG300 | |
|---|---|---|
| Price | $279.00 | $219.00 Discontinued |
| Ranked | #43 of 102 in Large Size Portable Bluetooth Speakers | #75 of 102 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~58Hz | 54Hz |
| Battery Life | 20 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| IP Rating | IPX2 | IPX7 |
| Weight | 5.5 lbs (2.49 kg) | 6.6 lbs (3 kg) |
| App | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | Yes (USB-A, 5V/1.5A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Amplifier Power | 36W | 16W RMS |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) | 12.5” x 5.4” x 5.4” (318 x 138 x 136 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters | 2x X-Balanced woofers, 2x 20mm tweeters |
| Maximum SPL | 102dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 5.2 |
| Strap | Yes (built-in strap) | No |
Related Speaker Comparisons
How Marshall Kilburn II compares with other leading options:
- Marshall Kilburn II vs Vifa Helsinki
- JBL Xtreme 5 vs Marshall Kilburn II
- Tribit Stormbox Lava vs Marshall Kilburn II
- Marshall Kilburn II vs Brane X
- Marshall Kilburn II vs Minirig 4 with subwoofer
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Marshall Kilburn II: $279.00 Amazon eBay
Newer model: the Marshall Kilburn III, ranked higher, rated 3.8/5.
Pros: 20W Class D amp + dual 8W tweeters. 20+ hour battery with quick-charge (20 min charges 3 hours of play). Rugged design with leather handle and reinforced corners, IPX2 rated. Thrives with rock music. Bluetooth 5.0 with 30ft range. Measured bass extension of ~58Hz (-10dB).
Cons: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak. Very low IPX2 water rating. AC charging
Full Marshall Kilburn II review and specifications →
| Amplifier Power | 36W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~58Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters |
| EQ | No |
| IP Rating | IPX2 |
| Maximum SPL | 102dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in strap) |
| TWS | Yes |
| Weight | 5.5 lbs (2.49 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Storytripper HD: Marshall Acton 2 vs Marshall Kilburn 2 More from storytripperhd →
- Mateusz Cholewa: Marshall Kilburn 3 vs Marshall Kilburn 2 More from Mateusz Cholewa →
- Mateusz Cholewa: New 2025😎 Marshall Kilburn 3 UNBOXING 📦Audio TEST vs Kilburn 2
- Mateusz Cholewa: Marshall Kilburn 3 DEEP BASS👌💪💖🆚 Marshall Kilburn 2 Outside
- Head-to-Head Comparisons
- Marshall Kilburn II vs JBL Xtreme 4
- Marshall Kilburn II vs Marshall Kilburn III
- Marshall Kilburn II vs Xdobo Bucket
- Marshall Kilburn II vs W-King T9
- Marshall Kilburn II vs Ultimate Ears Everboom
- Marshall Kilburn II vs Marshall Middleton
- Marshall Kilburn II vs Devialet Mania
- Marshall Kilburn II vs LG Xboom Bounce
- See all 61 comparisons
Sony SRS-XG300: $219.00 Discontinued Amazon eBay
Newer model: the Sony ULT Field 5, ranked higher, rated 3.5/5.
Pros: IP67 dust/waterproof rating. Bluetooth 5.2 with multipoint pairing, LDAC codec support. Retractable carry handle for easy portability. Big boomy bass-forward sound, excellent for parties. Fast-charging: 10 minutes gives 70 minutes playback. Stamina mode optimizes battery. Measured bass extension of 54Hz (-10dB).
Cons: Overly expensive. Bass not as deep as competitors. Upper mids peak. Hollow sounding. Rolled off treble. Not much clarity. Does not float. Speaker will not remain at max volume and will turn itself down automatically. Discontinued.
Full Sony SRS-XG300 review and specifications →
| Amplifier Power | 16W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 54Hz |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.5” x 5.4” x 5.4” (318 x 138 x 136 mm) |
| Drivers | 2x X-Balanced woofers, 2x 20mm tweeters |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 6.6 lbs (3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- DLX Willington: Who Sounds The Best Of Sony XG300, XB43 & JBL XTREME3 With Sound Sample BLIND CHALLENGE Reveal. More from DLXWillington →
- Techder Audios: SONY XG300 VS SOUNDCORE MOTION BOOM More from techderaudios →
- GYMCADDY: JBL Xtreme 3 Vs Sony XG300 - Its Not Even Close More from GYMCADDY →
- GYMCADDY: Sony XG300 Review & Compared To Sony XB43
- New Stuff TV: Sony SRS-XG300 Vs JBL Xtreme 3 More from NewStuffTV1 →
- Head-to-Head Comparisons
- Sony SRS-XG300 vs Klipsch Detroit
- Sony SRS-XG300 vs Doss Soundbox XL
- Sony SRS-XG300 vs JBL Xtreme
- Sony SRS-XG300 vs Ultimate Ears Epicboom
- Sony SRS-XG300 vs Dali Katch G2
- Sony SRS-XG300 vs B&O Beosound Level
- Sony SRS-XG300 vs Ultimate Ears Megablast
- Sony SRS-XG300 vs Harman Kardon Onyx Studio 4
- See all 39 comparisons