Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Marshall Kilburn II ranks #42 of 97 large speakers by sound quality at $279; the Marshall Bromley 750 ranks #12 of 12 large party speakers by sound quality at $999.95.
The Marshall Kilburn II is the lighter choice. 20W Class D amp + dual 8W tweeters. At 5.5 lbs (2.49 kg) it weighs much less than the Marshall Bromley 750 at 52.7 lbs (23.9 kg). The catch: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak.
The Marshall Bromley 750 is the longer-running, tougher pick. Much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward: the Marshall’s standout feature, sounding about the same from any angle. It is rated for 40 hours of battery against 20 for the Marshall Kilburn II. It is rated IP54 against IPX2 for the Marshall Kilburn II. It supports AAC Bluetooth, which the Marshall Kilburn II lacks. The tradeoff: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720.
Buy the Marshall Kilburn II ($279) for a large speaker; the Marshall Bromley 750 ($999.95) suits a large party speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Kilburn II | Marshall Bromley 750 | |
|---|---|---|
| Price | $279.00 | $999.95 |
| Ranked | #42 of 97 in Large Size Portable Bluetooth Speakers | #12 of 12 in Large Party Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Bass Extension (-10dB) | ~58Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| IP Rating | IPX2 | IP54 |
| Weight | 5.5 lbs (2.49 kg) | 52.7 lbs (23.9 kg) |
| App | No | Yes (Marshall Bluetooth app) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LC3 |
| Built-in Microphone | Yes | No |
| EQ | No | Yes |
| Party Mode | No | Yes (Auracast) |
| Power Bank | No | Yes (USB-C) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Amplifier Power | 36W | 400W |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters |
| Maximum SPL | 102dB (Manufacturer specified) | - |
| Digital Aux Input | No | Yes (USB-C) |
| Bluetooth Version | 5.0 | 5.3 |
| Strap | Yes (built-in strap) | No |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (2x XLR/6.35mm combo) |
| XLR Input | - | Yes (2x combo) |
| USB Playback | - | No |
| Wi-Fi | - | No |
| Removable Battery | - | Yes |
| Charging Time | - | 3.5 hours |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
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 2, 2026 at 10:18 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
- 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 Devialet Mania
- Marshall Kilburn II vs Marshall Middleton
- Marshall Kilburn II vs LG Xboom Bounce
- See all 63 comparisons
Marshall Bromley 750: $999.95 Amazon eBay
Pros: Much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward: the Marshall’s standout feature, sounding about the same from any angle.
Cons: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720. Not a great frequency response overall, with some midrange peaks. Only basic bass/treble controls, no full custom EQ like the JBL Partybox 720’s app. Default bass (dynamic mode) is overdone out of the box and needs trimming.
Full Marshall Bromley 750 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 | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) |
| Drivers | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters |
| EQ | Yes |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | IP54 |
| 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 | 52.7 lbs (23.9 kg) |
| Wi-Fi | No |
| XLR Input | Yes (2x combo) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Marshall Bromley 750 vs JBL Partybox 720 - outdoor test More from Oluv’Sone →
- Storytripper HD: W-King T12 vs Marshall Bromley 750 More from storytripperhd →
- Danny Pops: I Finally Got The Marshall Bromley 750 Everyone Wanted More from DannyPops →
- Oluv Patreon: JBL Partybox 720 vs Marshall Bromley 750
- Oluv Patreon: Marshall Bromley 750 - battery issues in the cold
- Oluv Patreon: Marshall Bromley 750 & Teufel Rockster Air 2 - outdoor test
- Oluv Patreon: Marshall Bromley 750 - 2nd look after update
- Oluv Patreon: Marshall Bromley 750 - first impressions
- Head-to-Head Comparisons
- Marshall Bromley 750 vs Sony SRS-XV900
- Marshall Bromley 750 vs Sony ULT Tower 10
- Marshall Bromley 750 vs Sony ULT Tower 9
- Marshall Bromley 750 vs Teufel Rockster
- Marshall Bromley 750 vs JBL Partybox 520
- Marshall Bromley 750 vs JBL Partybox 710
- Marshall Bromley 750 vs JBL Partybox 720
- Marshall Bromley 750 vs Teufel Rockster 2
- See all 24 comparisons