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Marshall Kilburn III — Review & Specs | Pricepect | Pricepect

Home Portable Bluetooth SpeakersMarshall Kilburn III

Marshall Kilburn III — image 1

Marshall

Marshall Kilburn III

Expert Review Analysis

The Marshall Kilburn III is a premium portable Bluetooth speaker with a classic amp‑style design, delivering 50 W tri‑amp 360° sound and up to 50+ hours of battery life, while featuring IP54 durability and Bluetooth 5.3 multipoint connectivity.

✓ Best for: Music enthusiasts seeking premium, loud, stereo sound in a durable amp‑styled speaker for home parties, backyard gatherings, short outdoor trips, or any setting where long battery life and splash resistance are important.✗ Not ideal for: Users who need ultra‑lightweight gear for backpacking, long hikes, or travel where every ounce matters, and those who expect the speaker to function as a power bank for charging devices.

Pros

✓Up to 50+ hours of continuous playback with quick 20‑minute charge for 8 hours of use.
✓Tri‑amp Class D system delivering 50 W total power with balanced bass, mids and treble.
✓IP54 dust and splash resistance allowing use near pools and outdoors.

Price History

Current

$299.99

Average

$362.66

Lowest

$295.35

Highest

$379.99

Good Deal — 17% below average

Price trend (90d):-21.1%

Best Seller Rank History

Now#255Best#178Worst#575 +320

Lower = better sales rank

Rating Trend

Rating4.7/ 5Reviews367+22 reviews +0.11

Specifications

Audio

Driver Configuration1 × 4" woofer, 2 × 2" full-range

Total Power50 W W

Maximum SPL91 dB dB

Frequency Response45 Hz – 20 kHz

Battery

Battery Life50+ hours minutes

Charging Time3 hours minutes

Quick Charge Duration20 min (adds 8 hours)

Battery TypeReplaceable Li-ion

Connectivity

Bluetooth Version5.3

Bluetooth Range3–10 m

AUX Input3.5 mm mm

Controls

Control TypeAnalog knobs (bass, treble, volume), M-button, jog dial, Bluetooth button

Design

Dimensions273 × 150 × 169 mm

Weight2800 g g

IP RatingIP54

Materials38% recycled, PVC-free, vegan leather

Speaker Volume418 in³ (6,850 cm³)

Features

Power BankYes (charges external devices via USB)

Dynamic LoudnessYes

True StereophonicYes (360° sound)

General

BrandMarshall

Model1007443

ColorBlack & Brass

Release Date2025-06-10

Warranty1 year

Power

Charging PortUSB-C

Charging Power30 W W

Software

App CompatibilityMarshall Bluetooth app (optional)

Audio Processing

Dynamic LoudnessAutomatically adjusts bass, mids and treble based on volume level.

Soundstage

True Stereophonic 360°Delivers immersive surround sound in all directions.

Materials

Eco‑Friendly Build38% recycled content, PVC‑free, vegan leather exterior.

Power Features

Built‑in Power Bank (optional)Provides USB‑C output to charge external devices, though not consistently documented.

Dimensions & Weight

Height6.65 Inches

Width5.91 inches

Depth10.75 inches

Weight6.17 Pounds

Research Sources

av-connection.com

editorialist.com

crutchfield.com

bhphotovideo.com

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User Reviews

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4.7

(367 reviews)

$299.99$379.9921% off

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1007443Black & BrassOne Size 1 year

Portable Bluetooth Speakers Portable Speakers

✓Bluetooth 5.3 with multipoint pairing and Auracast support for seamless multi‑device streaming.

✓Analog knobs for bass, treble and volume plus M‑button presets provide tactile control.

✓360° True Stereophonic sound creates immersive audio coverage in medium rooms.

✓Built with 38% recycled materials, PVC‑free vegan leather for eco‑friendly construction.

Cons

✗Weight of 2.8 kg (6.2 lb) makes it heavier than many competing portable speakers.
✗Some specifications inconsistently mention a built‑in power bank, leading to confusion.
✗No confirmed USB‑C output for charging external devices despite some claims.
✗App integration occasionally experiences glitches, though it’s optional.
✗Large volume (418 in³) may be cumbersome for backpacking or long hikes.

From Expert Reviews

Praised by Experts

✓RTINGS.com rates its portability highly, noting the lunchbox size, handle and one‑hand carry despite its class‑leading battery life.
✓eCoustics commends the tri‑amp configuration (4" woofer + two 2" drivers) for delivering muscular, eviction‑level loudness with balanced tone.
✓Crutchfield highlights the 50 W total power and 45 Hz‑20 kHz frequency response that fills rooms with clear, detailed audio.
✓AV‑Connection points out the 91 dB SPL and 360° stereophonic sound while praising the use of recycled, PVC‑free materials.

Criticized by Experts

✗Professional reviewers note the 2.8 kg weight limits true ultra‑portability compared to lighter rivals.
✗Some reviewers point out the lack of a confirmed USB‑C power‑out for charging phones, reducing its utility as a power bank.
✗Inconsistent documentation about a built‑in power bank creates uncertainty for buyers.

From User Reviews

Users Love

✓Users repeatedly praise the marathon 50+ hour battery that lasts through multi‑day events without recharging.
✓Everyday owners love the classic Marshall sound signature with adjustable bass and treble knobs for personalized audio.
✓The IP54 rugged construction is highlighted as ideal for beach parties and poolside gatherings.
✓Customers appreciate the effortless multipoint Bluetooth pairing that lets two devices stream simultaneously.

Users Complain About

✗Many users find the 6 lb weight cumbersome for hiking or extended outdoor carrying.
✗Some owners report occasional glitches in the Marshall Bluetooth app, though the app is optional.
✗A number of customers note the absence of a reliable USB‑C power‑out to charge phones, contrary to some expectations.

Expert Opinion

Professional reviewers commend the Kilburn III for its tri‑amp 50 W output, 360° stereophonic sound, long‑lasting 50+ hour battery and rugged IP54 build, while noting its relatively heavy 2.8 kg chassis and the ambiguous claim of a built‑in power bank as drawbacks.

What Users Say

Everyday users love the extended battery life, Marshall‑styled sound and durable IP54 design, frequently mentioning the convenient analog controls and easy multipoint pairing, but they commonly criticize the speaker’s heft and the lack of a reliable phone‑charging USB output.

Common Complaints

Heavy weight around 6 lb, inconsistent information about a built‑in power bank, occasional Bluetooth app glitches, and missing USB‑C power‑out for charging external devices.

How It Compares

vs. JBL Charge 5

Advantages

✓Kilburn III offers significantly longer battery life (50+ hrs vs 20 hrs) and true 360° stereophonic sound versus JBL’s mono output.

Disadvantages

✗Kilburn III is much heavier (2.8 kg vs 1.2 kg) and only IP54 compared to JBL’s IP67 water‑dust protection.

Choose Kilburn III for marathon listening and immersive sound; choose JBL Charge 5 for lighter, fully waterproof portability.

vs. Bose SoundLink Flex

Advantages

✓Kilburn III provides higher SPL (91 dB) and longer playback time, plus analog EQ knobs for on‑the‑fly adjustments.

Disadvantages

✗Kilburn III’s 6 lb weight and larger size make it less pocket‑friendly than the ultra‑portable Bose Flex, which also has a higher IP67 rating.

Pick Kilburn III when you need powerful, long‑lasting audio; pick Bose Flex for ultra‑light, truly waterproof convenience.

vs. UE Hyperboom

Advantages

✓Kilburn III matches Hyperboom’s powerful output while offering a lighter chassis and up to 50 hrs of battery, plus eco‑friendly materials.

Disadvantages

✗Hyperboom delivers higher total wattage (100 W) and deeper bass, and its larger size may be preferable for big‑party environments.

Select Kilburn III for extended battery life and portable amp aesthetic; select UE Hyperboom for maximum volume and bass in large gatherings.

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