Marshall has spent the last several years proving that people will pay a premium for a speaker that looks like a guitar amp and feels like one to use. The Acton has always been the entry point to that idea: the smallest of the brand's mains-powered home speakers, small enough for a bookshelf but loud enough to fill a room. This fourth generation, launched in July 2026, is the biggest step forward the line has taken.
The headline numbers are genuinely impressive for the size. Marshall doubled the woofer's amplifier to 60 watts and pushed the two tweeters from 15 to 25 watts each, for 110 watts total.
There's a redesigned bass port, a new RCA input for turntables, a customizable M-button, LDAC hi-res audio, and Auracast for multi-speaker setups. The price is $329.99 in the U.S. as of September 2026, available in Black or Cream.
I've had the Acton IV on my desk and in my living room for a couple of weeks, running it from a phone over Bluetooth and from a turntable over RCA. It's the most fun I've had with a speaker this size in a while. It's also a product that asks you to accept a specific set of compromises, and at $330 those compromises are worth spelling out before you buy.
Specifications
| Specification | Value |
|---|---|
| Type | Mains-powered Bluetooth home speaker (single unit, stereo) |
| Drivers | 1× 4-inch woofer; 2× 0.75-inch tweeters with waveguides |
| Amplification | 1× 60 W Class D (woofer); 2× 25 W Class D (tweeters); 110 W total |
| Frequency range | 37–38,000 Hz (claimed) |
| Maximum output | 95 dB SPL @ 1 m |
| Cabinet | Bass-reflex, port on the underside |
| Bluetooth | 5.3 with Auracast; multipoint |
| Codecs | SBC, AAC, LDAC, LC3 |
| Wired inputs | 3.5 mm AUX; RCA |
| Wi-Fi | None |
| Dimensions | 260 × 171 × 150 mm / 10.24 × 6.73 × 5.91 in |
| Weight | 2.65 kg / 5.84 lb |
| Colors | Black, Cream |
| Power | Mains, 100–240 V |
| Warranty | 1 year |
| In the box | Speaker, mains lead, quick start guide, legal and safety information |
Design and Build
The Acton IV looks almost identical to the Acton III, and that's clearly deliberate. It's a rectangular box with a woven front grille, the brass Marshall script centered on it, and a brass trim ringing the edges. The rest of the cabinet is wrapped in the same textured, leather-like material Marshall uses across its home range — a Tolex-style covering that looks like a vintage amp and survives a knock or two. It measures 260 × 171 × 150 mm (10.24 × 6.73 × 5.91 in) and weighs 2.65 kg (5.84 lb), which is light enough to move between rooms without thinking about it.
The top panel is where Marshall earns its money. There are three knurled brass knobs for volume, bass, and treble, a source button with small indicator lights, a media jog for play/pause and track skipping, the new M-button, and a chunky toggle power switch.
The knobs have real weight and detents, and the volume dial has far more steps than the tone controls, so you can fine-tune the level precisely. I spent an embarrassing amount of time just flicking the power switch back and forth. If you've used any recent Marshall speaker, you know the feeling; if you haven't, it's the reason people buy these things.
Marshall moved the bass-reflex port and the RCA connections to the underside this generation. That matters more than it sounds. It means the speaker can sit closer to a wall or on a shelf without the port getting choked, which is exactly where a compact speaker like this tends to end up. I placed it against a wall and about a foot out into the room, and the difference in bass was much smaller than I expected.
The build is solid, with no rattles or cabinet buzz even at high volume. Marshall also gets credit for making this repairable: knobs, feet, and the front grille are available as spare parts, and there's an authorized repair service. The cabinet uses FSC-certified MDF, 13% of the product is recycled material by weight, and there's no real leather anywhere. That's not why you'd buy it, but it's a better story than most speakers at this price offer.
The one design complaint is color choice. The Acton III came in five finishes; the Acton IV launches in Black and Cream only. Both look good, but if you wanted the brown or burgundy to match a room, you're out of luck for now.
Sound Quality
Marshall doesn't publish a frequency-response graph, and no independent lab has put the Acton IV through standardized measurements yet, so my impressions here come from listening rather than test-bench data. Take that for what it's worth, and treat the specs as claims rather than measurements.
On paper, you get a 4-inch woofer and two 0.75-inch tweeters with waveguides, 110 watts of Class D amplification, a claimed 37 Hz–38 kHz range, and a maximum output of 95 dB SPL at one meter. That last figure is the one that tells the real story: this is a small speaker, and Marshall isn't pretending otherwise.
Tonally, it's pure Marshall: warm, bass-forward, and built to make rock and electronic music sound big. The bass is the first thing you notice, and it's genuinely good for the size.
Kick drums have weight and punch, and the redesigned port keeps the low end from turning to mush. It doesn't dig as deep as the larger Stanmore IV — a 5-inch woofer in a bigger cabinet will always win that fight — but for a speaker you can carry in one hand, it's impressive. On bass-heavy tracks the low end can get a little thick and take up more space than it should, and the kick drum occasionally sounds more round than tight. Dialing the bass knob back a notch or two cleans that up nicely.
The midrange is where the Acton IV does its best work. Vocals sound full and natural rather than pushed forward or recessed, and acoustic instruments have a warmth that suits the speaker's vintage looks.
The treble is smooth and easy to live with. Marshall has tuned it to avoid the sharp, fatiguing edge that cheaper speakers often have, and long listening sessions never left my ears tired. The trade-off is that the very top end rolls off, so cymbals lose a little air and sparkle compared with the best in the class.
The weaknesses show up as you push the volume. At moderate levels — which for this speaker is still loud enough to fill a medium room — it stays composed and detailed.
Crank it toward maximum and things start to blur. Dense, heavily layered recordings get harder and slightly muddy, and the bass can overpower the mix. It never falls apart, but the Acton IV sounds its best below its ceiling rather than at it. That's a fair criticism at $330, and it's the main reason I wouldn't call this a speaker for critical listening.
Stereo imaging is the other limitation. The tweeters are angled outward and the waveguides do widen the sweet spot compared with the Acton III, so the sound is less dependent on exactly where you sit.
But this is still one box, and the left-right separation is narrow. On a well-recorded track, instruments don't snap into distinct positions the way they do on a true stereo pair. Marshall's marketing calls it "room-filling stereo," and it does fill a room — just don't expect a convincing stereo image.
The Dynamic Loudness feature is genuinely useful. It subtly adjusts the tonal balance at low volumes so the bass doesn't vanish when you turn things down, and it does this without sounding processed. Quiet late-night listening kept its warmth, which is more than I can say for a lot of speakers.
Inputs and Connectivity
This is where the Acton IV is most improved and most frustrating at the same time.
The good news is the new RCA input. It sits on the underside alongside the power connection, and it means you can plug a turntable with a built-in or external phono preamp straight into the speaker without an adapter or a separate receiver.
Alongside the 3.5 mm AUX jack on top, that gives you two analog inputs and Bluetooth. The source button cycles between them, and the indicator lights make it obvious which is active. If you're building a simple vinyl-plus-streaming setup, this is exactly the right port selection.
Bluetooth is version 5.3, and codec support is better than most rivals at this price: SBC, AAC, LDAC, and LC3. LDAC is the important one. It streams up to 990 kbps from a compatible Android phone, which gets you close to hi-res quality without a cable.
iPhone owners are limited to AAC. Multipoint is supported, so you can stay connected to a phone and a laptop at once, and pairing is painless — the speaker drops into pairing mode on first power-up, and holding the source button handles new devices. Over two weeks of daily use I didn't get a single dropout within normal range.
The frustration is what's missing. There is no Wi-Fi. That means no AirPlay, no Google Cast, no Spotify Connect, and no voice assistant.
In 2026, at $330, that's a real gap. Wi-Fi streaming doesn't just add convenience — it lets you cast losslessly from apps, control the speaker from a laptop without pairing, and join a proper multi-room system. The Acton IV asks you to use Bluetooth or a cable, full stop.
Marshall's answer to multi-room is Auracast, the Bluetooth broadcast standard. The Acton IV can receive an Auracast stream and play in sync with other compatible speakers. But to run a whole-home setup you need a Marshall broadcaster — the Heddon music streaming hub — which is a separate purchase. It works, and it's more flexible than nothing, but it's a workaround for the missing Wi-Fi chip, not a replacement for it.
There's no HDMI or optical input, but that's expected — this isn't a soundbar, and Marshall has separate products for TV audio.
Features and App
The Marshall app adds the controls the physical knobs can't. You get a five-band equalizer, several sound presets, a Placement Compensation tool, M-button configuration, a sleep timer, and the ability to dim the LED brightness. Firmware updates come over the air.
Placement Compensation deserves a note. The name suggests room correction, but it's really a bass adjustment: tell the app whether the speaker is against a wall, in a corner, or out in the open, and it adjusts low-frequency output accordingly. It's useful and it works, but it's not the kind of acoustic calibration you'd get from a premium Wi-Fi speaker with a microphone.
The M-button is a nice addition. You can set it to recall a saved EQ preset or to launch Spotify Tap, which jumps straight to a playlist. One press, done. It's the kind of small convenience that makes you use the speaker more.
The app itself is the weakest part of the package. It's functional, but the layout buries some settings, there's no built-in music player, and parts of the interface aren't fully translated. The physical controls are so good that you'll rarely need the app for day-to-day use, which softens the blow, but it's not the polished experience you'd hope for at this price.
Who This Speaker Is For
Buy the Acton IV if:
- You want a compact home speaker that looks as good as it sounds, and you're happy to pay for the design.
- You're building a vinyl setup and want to plug a turntable directly into the speaker via RCA.
- You mostly stream from a phone and don't need Wi-Fi casting, AirPlay, or Spotify Connect.
- You value physical controls — real knobs and a satisfying power switch — over app-driven control.
- You have a small or medium room and want warm, bass-forward sound that fills it easily.
- You're an Android user who wants LDAC hi-res streaming over Bluetooth.
Skip it if:
- You want Wi-Fi streaming. The lack of AirPlay, Google Cast, and Spotify Connect is the single biggest reason to look elsewhere.
- You want a voice assistant built in. There's no microphone at all.
- You care about stereo imaging. One box can't produce true left-right separation.
- You listen at very high volume often. The Acton IV gets loud, but it loses composure near its maximum.
- You want maximum features per dollar. Cheaper rivals offer Wi-Fi and multi-room for less.
- You need a portable speaker. This is mains-powered only.
Competitive Comparison
| Speaker | Price | Wi-Fi / streaming | Inputs | Power / drivers | Notes |
|---|---|---|---|---|---|
| Marshall Acton IV | $329.99 | None (Bluetooth 5.3, LDAC) | AUX 3.5 mm, RCA, Bluetooth | 110 W; 4-inch woofer, 2× 0.75-inch tweeters | Retro design, excellent controls, Auracast |
| Marshall Acton III | ~$259.99 street | None (Bluetooth 5.2) | AUX 3.5 mm, Bluetooth | 60 W; same driver layout | Previous gen; no RCA, no LDAC, no M-button |
| Marshall Stanmore IV | $399 | None (Bluetooth 5.3) | AUX, RCA, Bluetooth | 110 W; 5-inch woofer | Bigger sibling; deeper bass, same feature limits |
| JBL Authentics 200 | $379.95 MSRP; ~$200 street | Wi-Fi, AirPlay 2, Google Cast, Spotify Connect | Wi-Fi, Bluetooth, AUX | 2-way, 5-inch woofer | Also has Alexa + Google Assistant; retro looks |
| Sonos Era 300 | $449 | Wi-Fi multi-room, AirPlay 2 | Wi-Fi, Bluetooth, USB-C | 6 drivers, spatial audio | Full multi-room ecosystem |
| Klipsch The One Plus | $274 | None (SBC/AAC only) | Bluetooth, AUX | 2-way | Retro styling; softer sound, weaker controls |
| Audio Pro Addon C5 MKII | $219 | None (SBC/AAC only) | Bluetooth, AUX | 2-way | Cheaper; no LDAC, no RCA |
The comparison makes the Acton IV's position clear. Against its own predecessor, it's a clear upgrade: more power, deeper claimed bass extension, RCA, LDAC, and better controls for about $70 more.
Against the Wi-Fi competition, it's a different kind of product. The JBL Authentics 200 costs less on the street, sounds competitive, and adds Wi-Fi, AirPlay 2, Google Cast, Spotify Connect, and both major voice assistants. The Sonos Era 300 costs more but plugs into a mature multi-room system. Klipsch's The One Plus and Audio Pro's Addon C5 MKII are cheaper but have weaker codec support and less power.
If what you want is the Marshall look, tactile controls, and an analog input, the Acton IV is the best version of that formula. If what you want is the most capable $300–$400 home speaker, it isn't.
Pros and Cons
Pros
- Warm, powerful, room-filling sound with strong bass for its size.
- 110 W of amplification — a big jump over the Acton III's 60 W.
- New RCA input makes it genuinely turntable-friendly.
- LDAC and LC3 support give Android users hi-res Bluetooth audio.
- Superb tactile controls: real knobs, a satisfying power switch, and a configurable M-button.
- Bass port moved underneath, so it works close to a wall.
- Auracast support for multi-speaker setups.
- Solid, rattle-free build with user-replaceable knobs, feet, and grille.
- FSC-certified cabinet, 13% recycled material, vegan materials.
Cons
- No Wi-Fi, so no AirPlay, Google Cast, Spotify Connect, or multi-room without a separate Heddon hub.
- No voice assistant and no microphone.
- Stereo separation is narrow — it's one box, not a true stereo pair.
- Loses composure and clarity at very high volume.
- Bass can sound thick on some tracks until you adjust the tone controls.
- Only two colors at launch, down from five on the previous generation.
- The app is clunky, with no music player and incomplete translations.
- Price has crept up: launch coverage cited $299.99, and it now lists at $329.99.
Verdict
The Marshall Acton IV is the best Acton Marshall has made. It's louder, deeper, more flexible, and more repairable than the Acton III, and the addition of RCA turns it into a genuinely good centerpiece for a small vinyl setup. The controls remain the best in the business, and the sound is warm, energetic, and easy to live with.
At $329.99, though, the missing Wi-Fi is hard to overlook. Rivals like the JBL Authentics 200 offer AirPlay, Google Cast, Spotify Connect, and voice control for less money on the street, and Sonos offers a whole multi-room ecosystem for a bit more. What the Acton IV sells is design, tactility, and simplicity — and if those matter to you, it delivers them better than anything else in the category.
Buy it if you want a beautiful, great-sounding speaker for a small room and you're happy streaming over Bluetooth or plugging in a turntable. Skip it if you want modern streaming features, because that's exactly what this speaker doesn't do. The one thing that would change the verdict is a Wi-Fi chip — and until Marshall adds one, this remains a deliberate, charming, slightly old-fashioned choice.
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