Speakers

Marshall Stanmore III Review: Wireless Bluetooth Speaker

4
Out of 5
12 January 2023
Updated 4 November 2025
3 minute read
Editorially reviewed

Overview Among the wireless speakers launched by Marshall this summer, the Stanmore III finds its place between the Acton III and the Woburn III. The three speakers are so similar that we recommend you read the Acton III review carefully to understand the Stanmore III review. The latter was…

Search Amazon UK for this productSearch Amazon US for this product

As an Amazon Associate I earn from qualifying purchases. Price and availability can change.

Marshall Stanmore III Wireless Bluetooth product image

Quick Specs

Brand
Marshall
Model
III
Condition
New
Type
Other
Warranty
1 Year

Our Verdict

Overview Among the wireless speakers launched by Marshall this summer, the Stanmore III finds its place between the Acton III and the Woburn III. The three speakers are so similar that we recommend you read the Acton III review carefully to understand the Stanmore III review. The latter was…

Our editorial process

Research method, author and affiliate-independence details

An editorial assessment of product information. Hands-on testing by Truthful Reviews is stated only when documented first-party evidence is available.

  • Our editorial team structures the review around buyer-relevant strengths, weaknesses, and specifications.
  • We aim for clear section coverage and practical verdict reasoning rather than generic product copy.
  • Affiliate links are handled separately from the editorial verdict.

Read our full methodology: how we review

Review type
Editorial review
Editorial standard

Affiliate links never determine our verdicts. Commercial relationships are disclosed separately from the editorial assessment.

The Stanmore III is a wireless speaker designed by Marshall. The Stanmore III is a wireless speaker designed by Marshall. It offers few new features compared to the previous version, except for some sound treatments that are supposed to improve the listening experience.

Pros

  • Powerful and balanced sound
  • Deep and accurate bass
  • Simple and easy to use

Cons

  • Lack of midrange and treble precision
  • Latency in Bluetooth

Overview

Among the wireless speakers launched by Marshall this summer, the Stanmore III finds its place between the Acton III and the Woburn III. The three speakers are so similar that we recommend you read the Acton III review carefully to understand the Stanmore III review. The latter was released in June 2022 for £369. It was tested in its version 5.0.36 with the app in version 2.0.7.Apart from its larger size (35 x 20.3 x 18.8 cm for 4.25 kg), the Stanmore III is very similar to the Acton III. Thus, we find the vintage look of Marshall, combining mesh fabric, copper parts and tolex-like plastic on its contour. There are also 4 rubber feet on the bottom. The finish is particularly well done, with only a few visible assembly traces.The Stanmore III has a slightly more extensive range of coections than the Acton III. In addition to Bluetooth 5.2 connectivity (with multipoint support) and a mini-jack input, the Stanmore III also has an RCA line input on the rear. The Stanmore III has no coected features (no multiroom, AirPlay 2, Chromecast, Spotify Coect, or voice assistants...).The physical controls on the speaker are the same as those in Acton III. The Stanmore III is therefore just as pleasant and easy to use as its little sister. It can also be managed through Marshall's Bluetooth app. There are various controls as well as options for placement compensation.nLike the Acton III, Bluetooth communication with the Stanmore III involves a latency of 290ms. That's enough to notice a lag between the sound and image of a video, but fortunately, the speaker can compensate for this delay automatically on a video streaming application. But there needs to be more help for gaming applications.In terms of sound performance, the Stanmore III is close to what the Acton III offers, with a few exceptions. The first is obviously the power. The Stanmore III is indeed much more equipped than its little sister, with a loudspeaker powered by a 50 W amplifier and two tweeters with 15 W amplifiers. It is therefore much higher in the towers. It also descends a little more in the extreme bass. It is also necessary to control the bass to get the best out of this Stanmore III, notably with the help of the placement compensations.Its larger size also offers a much wider soundstage than the Acton III. Like Acton III, the inclination of the two tweeters does not affect the speaker's directivity, which requires you to be positioned in front of it to enjoy the best possible sound reproduction. In all other respects, the listening experience delivered by Stanmore III is perfectly identical to that of Acton III.

CONCLUSIO

More powerful and better equipped than the Acton III, the Stanmore III proves to be a good wireless speaker, thanks to its rich sound and childlike handling. Compared to the previous version, the addition of placement compensation functions is welcome. However, we regret the lack of interest in the inclination of the tweeters, as well as the absence of coected functions.

Ready to Purchase?

Check current prices and availability

SSL Secure
Editorial review

Affiliate Disclosure: As an Amazon Associate I earn from qualifying purchases. Truthful Reviews may receive a commission when you buy through eligible Amazon UK or Amazon US links, at no extra cost to you. Affiliate partnerships never determine our verdicts or recommendations.

Compare with Similar Products

ProductRatingCategoriesSummaryAction
Marshall Stanmore III Review: Wireless Bluetooth Speaker
4/5
Speakers

Overview Among the wireless speakers launched by Marshall this summer, the Stanmore III finds its place between the Acton III and the Woburn III. The three speakers are so similar that we recommend you read the Acton III review carefully to understand the Stanmore III review. The latter was…

Current
Samsung HW-B450 Review: 2.1ch Soundbar
4/5
Speakers

In principle, only a simple 2.1-chael solution. Thanks to decent power reserves, it has more sound potential than many more sophisticated surround sound arrangements. The home cinema audio product package consisting of two main components produces 300 watts, according to the relatively reliable RMS…

View Review
Marshall Middleton II Review: Powerful Portable Speaker with Modern Refinements
3.8/5
Portable speakers

The Marshall Middleton II portable Bluetooth speaker delivers powerful 360° sound, IP67 waterproofing, and exceptional 30-hour battery life. Whilst its bass-heavy signature and 1.8 kg weight may not suit everyone, it offers modern features including Auracast compatibility, replaceable battery, and robust construction for those prioritising power and durability over compact portability.

View Review
Google Home Speaker Review: Gemini Takes the Lead
Not rated
Electronics

Google's first Gemini for Home speaker replaces the entire Nest range, combining a compact 360-degree design, a base light ring, Matter and Thread support and sound that leans heavily on its bass.

View Review
JBL Boombox 4 Review: The Ultimate Portable Powerhouse
4.5/5
Speakers

The JBL Boombox 4 sets a new benchmark for portable speakers with exceptional sound quality, 34-hour battery life, and AI Sound Boost technology. Whilst the premium price and substantial weight may deter some, this speaker delivers uncompromising audio performance for those who demand the very best.

View Review
Harman Kardon SoundSticks 5 Wi-Fi Review
4.4/5
Speakers

The SoundSticks 5 Wi-Fi trades the standard model’s HDMI ARC for full network streaming — AirPlay 2, Google Cast, Spotify Connect, Tidal Connect and Roon Ready — behind a three-way, 190 W design that still belongs in a museum.

View Review
Ultimate Ears EpicBoom Review
4.3/5
Speakers

The EpicBoom pairs excellent 360-degree sound and class-leading Bluetooth range with IP67 sealing — and a conspicuously short feature list. Measured 11 hrs 40 min of battery and near-2 kg weight make it a carry-to-the-party speaker, not a clip-on.

View Review

Share Your Experience

No account or sign-in needed. Your name and comment will be public only after approval. Please do not include private contact details.

0/5000 characters

Comments are moderated. See our community guidelines and privacy policy.

Loading comments...