PRICE $4,999
AT A GLANCE
Plus
180Wpc class-G power with real headroom
Full-stack streaming: AirPlay 2, Chromecast, Spotify/Tidal/Qobuz Connect, Roon Ready
HDMI eARC for seamless TV audio
Dirac Live full bandwidth with dual sub outs including XLR
8.8″ color display and clear, simple ergonomics
Minus
Non-touch display
Premium price
THE VERDICT
Arcam’s SA45 is a modern two‑channel integrated amplifier that replaces a rack of separates. It streams natively, corrects the room with Dirac Live, talks to your TV over eARC, and has the power to drive serious speakers. A couple of software hiccups aside, it made high-quality living‑room hi‑fi easy.
This integrated amplifier is the right answer when you want power, fidelity, and simplicity in the same box. The SA45 does streamer, DAC, preamp, and power amp duty without the old-school AVR-style menu gymnastics. I used it as a pure two-channel solution for music and movies, in a real living room. I streamed everything. No discs. My apologies to physical media fans, but at this point the quality of streaming is just plain good enough for my needs.
Compared to a multichannel AVR, setup with the SA45 was faster, daily use was simpler, and results hold up well in terms of the quality of the sound. Ever since ARC HDMI input started showing up on two-channel integrated amplifiers, I’ve been an enthusiastic proponent of taking that approach for living room-based systems, and not being tempted to spread the investment thin, as it were, into more than two speakers. Because there’s a lot to be said about having fewer, better speakers when it comes to enjoying music, and also when it comes to the key issue of dialog clarity for TV and movies.
Features
The SA45’s foundation is a powerful stereo amplifier: 2×180W into 8 ohms and 300Wpc into 4 ohms. Arcam uses a class‑G design (a variant of class-A/B), with class‑A operation at low output levels. Streaming support covers AirPlay 2, Chromecast, Spotify Connect, Tidal Connect, Qobuz Connect, and Roon Ready, plus internet radio and podcasts.
For TV, HDMI eARC ingests hi-rez audio reliably. Dirac Live runs full bandwidth with dual sub outs. Physical I/O includes balanced XLR and three RCA line inputs, MM/MC phono, two optical, two coax, and Ethernet. Of course you also get Wi‑Fi and Bluetooth aptX HD.
The 8.8″ color display shows art and status. It is not a touchscreen, but the UI is readable and direct; you can navigate the menus with the SA45’s two large knobs, the included remote, or the app.
The Arcam Radia app pairs with the SA45 and connects with Wi-Fi, offering controls, and access to the SA45’s built-in streaming features: browsing and playing Internet Radio and Podcasts with favorites and assignable presets; playback control for UPnP shares and a USB drive connected to the amp; and access to a s
Actual playback for Spotify Connect, TIDAL Connect, and Qobuz Connect is initiated from those services’ native apps. Dirac Live room correction is run in the separate Dirac Live software, not in the Radia app.
You get full-featured Dirac Live room correction with the SA45.
Setup
My listening area is 15’×20’×10′, untreated but filled with furniture, a rug, and art on the walls, so there’s a good balance of natural diffraction and absorption. Sources include an Apple TV 4K into the TV, with audio back to the SA45 via eARC. Most of the control for music playback used and iPad. I tapped Qobuz, Amazon Music, and Apple Music for audio, and I streamed movies and TV with the Apple TV 4K, and on a few occasions I used Chromecast to cast tabs from my PC laptop.
I used my laptop and a UMIK-2 microphone to create Dirac filters. For most of the review, the speakers were the JBL 4349 studio monitors. These reach the low 30s Hz in my room, delivered with the authority of live music. I supplemented the bass with a dual‑opposed 12″ sub.
I also ran the system with GoldenEar T44 towers, which feature built-in subs. I ran them full range with Dirac. The low‑frequency output resulted in a neighbor complaining twice; that had never happened before. I do not want to be the noisy neighbor, but it confirmed how effectively the system energized the room. The T44s have a cleaner, slimmer look, as compared to the JBLs, they fit the living space better. Both speaker systems impressed, notably the JBLs play as deep and will go louder thanks to the high power output of the SA45. But the GoldenEars integrated seamlessly, visually and sonically, with the Arcam and the room.
Performance
The performance and fidelity of this system is impressive. The amps are transparent, the sound is pristine, and it puts out gobs of current. Thanks to Dirac Live you can fine-tune the character of the sound. However, please note (or forgive) the fact that I’m omitting both detailed listening notes and lab plots from this review. Why? Because I’ve become somewhat radicalized. Unless you have a lab in which to perform measurements and blind testing, chances are charts and in-depth descriptions of what one device is doing within a complex system can mislead more than inform.
As Dr. Sean Olive—who recently retired as Senior Fellow at Harman—has shown with scientific rigor, sighted listening is bias-prone and unreliable without difficult to implement blind controls. Meanwhile, as the famous speaker designer Andrew Jones has shown, measurements are method and context dependent, with competent labs differing by 2 to 3 dB when measuring the same reference speaker. Variables that cannot be fully tamed shift measured outcomes to a degree that correlates to audible differences.
In practice the room, setup, placement, level, and music selection dominate what you hear. And typical reviewers are not equipped to make detailed measurements. Even the best-sounding listening rooms are essentially “snowflakes” in the sense they are inimitable, each one is different.
The primacy of the room is especially apparent when you add room correction to the mix! And that may well be the most important point, that the SA45 has full support for Dirac Live, making room correction a dominant factor in its overall audio performance.
Ultimately, these variables swamp both reviewer narrative and graphs. Except, I suppose, for the clustered measurements at the listening position. Not that those are useful to a reader, but while purely subjective, the variation between the measured positions shows me how profound the impact of the room is on the sound. Once you understand how sound reacts with a room, you realize that quite literally, the listening notes of a reviewer are not just about the specific system and room combination, they are comments about the exact blend of sound that only exists in the specific spot in physical space from which those observations are made. Typically, that is a “sweet spot” between a stereo pair. A spot which audiophiles seek out, and which other listeners are blissfully unaware exists.
Bottom line: I won’t pretend my rig is your reference, and I won’t present context-sensitive plots as universal truth. But that does not mean there’s no point in reviewing audio gear. Just like you don’t need all the details to understand if you enjoy how a car drives on a given road, the same goes for hifi gear and music. Importantly, many buyers are equally interested in appearance and functionality, not just the raw measured performance.
The SA45 is designed to push big speakers to concert-like levels, and I found it more than capable in that regard.
Music
What I can report is that music consistently sounded great, and it did not take a lot of effort to get there.
The production styles of the various artists I like shine on a good system like this. Sly & Robbie’s dubby bass lines had grip and shape, no overhang. Bill Laswell and Scorn brought carefully crafted sub‑bass that carried texture, not just pressure. Bassnectar’s heavy synth modulation moved air, yet stayed controlled, the highs shimmered. The Orb’s layered ambience stayed open, with deep layering and a 3D soundstage that extended well beyond the speaker cabinets and reached behind my head. Public Enemy sounded thick and energetic; snare transients stayed sharp.
Classical recordings opened up and offered ear-perking realism, the character of the instruments rendered with verisimilitude. But, note that the SA45 does not sweeten rough recordings.
Granting the role speakers play in all this, across playlists the center image is locked. Vocals sat in space and did not wander. Dynamics scaled without strain. With the JBLs, impact and stage size felt effortless. With the T44s, full‑range bass arrived in a slender tower that offers silky smooth precision.
Movies (two-channel)
Everything from my Apple TV 4K rode HDMI into the TV and returned over eARC. Dialog was anchored and always intelligible at moderate levels. Watching Superman, quiet lines came through without riding the volume. One of the complaints from a neighbor occurred during Fantastic Four, but I had no problem turning it down, everything remained clearly audible. Impacts stayed punchy.
The JBLs and GoldenEars both handled most deep bass-containing content perfectly without the sub. But the sub’s value showed up below, 30 Hz, specifically when movie soundtracks called for the really deep stuff that is beyond the range of the speakers. The sonic impact you expect from movies is there.
Stereo downmixes tracked what’s on the screen well and avoided the “hole in the middle” effect that inferior two‑channel TV setups can produce.
I’ve had the pleasure of reviewing many different surround systems over the years, and certainly a well set up multi-channel Atmos rig can do things that this two-channel system simply cannot. But at least to me, it’s somewhat remarkable how you can achieve full immersion, a complete suspension of disbelief with just two channels.
And I always think about how I read complaints from home theater aficionados that they simply cannot get enough dialog clarity out of their expensive center channel speaker. And I’m left wondering, “well, hey, I never have dialog clarity problems when I use a phantom center,” which really is what you get with a simple stereo system. It’s a high-end phantom center, and if you sit in the audiophile “sweet spot” you’ll surely hear that dialog perfectly centered to the screen, as if you had an acoustically-transparent screen.
It is a matter of fact that I watched a ton of movies during the time I had the SA45 on hand. Spinal Tap 2, The Naked Gun, Kingdom of Heaven, Mission Impossible: The Final Reckoning, Architecton, Transformers One, Deadpool & Wolverine, Dune Part Two, Stop Making Sense, and Oppenheimer come to mind, just scrolling through my watch history. The main thing I have to say is I cannot recall a single instance where I couldn’t hear the dialog, enjoy the score, or hear the various layered sound effects in a complex scene.
Dirac Live and bass management
Engaging room correction removed modal peaks, tightened kick drum lines, and corrected bass tones without overtly changing speaker character. The final sound is largely up to the user. The bypass vs. engage difference was both obvious and measurable. But it is also worth noting that the system sounded great without Dirac, with the GoldenEar T44 towers offering the flexibility of adjustable bass while with the JBLs a simple volume adjustment on the sub was all it took to get a balanced sound. But for a truly dialed-in sound, don’t skip Dirac, it’s inclusion is one of the SA45’s most outstanding features.
Ergonomics and reliability
Daily operation was straightforward. Inputs are labeled plainly. The front display reduces guesswork, you can see exactly what’s playing. The interface is pretty, and easy to navigate, but on occasion it acted a bit erratically.
I found the app easy to navigate and fast. Still, the unit did freeze a couple times, when I bounced between AirPlay and HDMI. A power cycle cleared it. As I write this, it’s been weeks since I experienced any issue. Still, a firmware update to smooth things over seems in order (this SA45 was reviewed with firmware version 01.12, the latest available). A couple hiccups notwithstanding, the SA45 behaved itself.
Compared to an AVR
The SA45 is simpler for a living room focused on music and two‑channel movie sound. True, you forego true 360 immersion. But, also no surround mode roulette. No overbuilt feature set you never configure. Streaming is native. Advanced room correction and HDMI eARC are supported. Power is plentiful without the need for the usual multichannel receiver watts per channel caveats where the spec on the box is actually the AVR’s peak “two-channels driven” rating. The result is less time spent in menus, and more time listening.
Conclusion
This is two‑channel hi‑fi for the living room done right. The SA45 replaces multiple boxes, integrates with the TV, uses Dirac to fix the room, and looks good doing it. With JBL 4349s it delivered scale and control. It is a perfect pairing in terms of matching the power handling capabilities of the speaker to the amp.
With GoldenEar T44s, the SA45 was superb match in terms of modern aesthetics, offering a minimalist footprint suitable for compact urban apartments. Either way the amplifier never became the limiting factor. If you want transparent sound, straightforward setup, and a clean system that you will use every day, the SA45 makes the case. The price is not small, but it buys a compelling combination of clarity, power, capability, and simplicity.
Okay. One more thing. Without question, the Arcam SA45 is a more capable device than what I tasked it with. It has way more power than I actually used. It sports inputs for multiple analog and digital external source devices, and supports dual subwoofers. You can upgrade Dirac Live to include Bass Control. It’s well-rounded, adaptable, and powerful. I have only scratched the surface of what it can do.
Specs
AMPLIFICATION: 2×180 W into 8 Ω, class-G (class-A at low levels)
INPUTS: Balanced XLR, 3×RCA line, MM/MC phono, HDMI eARC, 2×optical, 2×coax, Ethernet, Wi-Fi, Bluetooth aptX HD
OUTPUTS: Pre-out, 2×sub outs (RCA and XLR)
STREAMING: AirPlay 2, Chromecast, Spotify Connect, Tidal Connect, Qobuz Connect, Roon Ready, internet radio, podcasts
ROOM CORRECTION: Dirac Live full bandwidth
DISPLAY: 8.8-inch color, non-touch
