Marshall Kilburn III Review: Ranked #41 of 97

Last updated: October 3, 2026

The Marshall Kilburn III ranks #41 out of 97 total Large Size Portable Bluetooth Speakers for sound quality. See all Portable Bluetooth rankings for every top pick.

Brand: Marshall

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.

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Marshall Kilburn III - ranked #41 of 97 Large Size Portable Bluetooth Speakers · Editor's rating 3.8/5
Check price at Amazon ($379.99) →

#41 Marshall Kilburn III: $379.99 Amazon eBay

Older model: the Marshall Kilburn II (ranked lower, rated 3.8/5).

Pros: Spacious soundstage with broad stereo dispersion from Marshall’s True Stereophonic multi-driver layout, delivering warm, room-filling sound with 45Hz bass extension. Independent physical bass and treble dials allow quick tonal adjustments on the fly, backed by app-based EQ and placement compensation. Battery life is outstanding at up to 50+ hours with USB-C power-bank charging, IP54 splash resistance, 3.5mm aux input, and Bluetooth 5.3 with Auracast broadcast support. Measured bass extension of 45Hz (-10dB).

Cons: Noticeable dips in the midrange compromise frequency response neutrality, making vocals and acoustic instruments sound somewhat recessed or muffled compared to more linear competitors like the JBL Xtreme 4 unless the bass dial is dialed back. Kilburn II retains slightly punchier perceived loudness at maximum volume due to a more aggressive V-shaped contour. At 2.85 kg with only IP54 splash resistance, it is heavy and cannot withstand water immersion. Lacks a built-in microphone and LDAC codec support.

Related speakers: Marshall Kilburn II.

How it compares: Just above it: Zicoroop Ts - 35 fewer hours of battery life. Just below it: Marshall Kilburn II - $101 cheaper, 30 fewer hours of battery life.

Amplifier Power50W
AppYes
Aux InputYes
Bass Extension (-10dB)45Hz
Battery Life50 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC, AAC
Bluetooth Version5.3
Built-in MicrophoneNo
Digital Aux InputNo
Dimensions10.7” x 5.9” x 6.7” (272 x 150 x 170 mm)
Drivers1x 4” woofer + 2x 2” full-range drivers
EQYes
Frequency Response45Hz - 20kHz
IP RatingIP54
Maximum SPL91dB
OmnidirectionalNo
Party ModeYes (Auracast)
Power BankYes
Power InputUSB-C
StereoYes
StrapYes (built-in strap)
TWSYes
Weight6.3 lbs (2.85 kg)
Check current price at Amazon ($379.99) →Search eBay for Marshall Kilburn III →

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Questions about the Marshall Kilburn III? Ask other owners on r/WirelessSpeakers.