AUDIO ORIGAMI BLOG

Harbeth M40.5 XD2 Review

At Audio Origami, we’ve always had a slightly love–hate relationship with Harbeth loudspeakers. That said, we’ve owned nearly every model, often more than once, which probably tells you it’s more love than hate.

The funny thing about Harbeth speakers is that their biggest flaw is also, depending on your perspective, their biggest strength.

We’re talking about cabinet bloom; that gentle warmth and fullness that sits somewhere between the mid-bass and midrange. Once you notice it, part of you wishes it would disappear. But the moment you replace the speakers with something more “neutral”, you suddenly miss it.

That bloom is essentially Harbeth’s secret sauce. It adds scale, tonal richness and emotional weight to music, making performances feel larger and more human. Strictly speaking, it’s far from textbook neutrality, but absolute neutrality can sometimes feel like staring at a blank canvas. Harbeth prefers colour, texture and musical engagement. And honestly, so do we!

A Bit of History

Our first encounter with the flagship Harbeth monitor came around eight years ago with the M40.2. These were big standmount speakers (and yes, we mean BIG), but they worked beautifully in our system.

We lived happily with them for about a year until a very knowledgeable hi-fi friend visited and pointed out that familiar cabinet bloom. Once mentioned, it became impossible to ignore. A few months later, curiosity won and the Harbeths made way for a pair of passive ATC SCM150s.

The ATCs were impressive: clean, powerful and undeniably neutral. But after six months, we realised we just weren’t emotionally connecting with the music in quite the same way.

Fast-forward several years and several speaker changes later, we needed something for our smaller office test system. By then, Harbeth had released the updated M40.5 XD2, with claims of improved transparency and greater neutrality compared with earlier generations.

A beautiful walnut pair arrived, we connected them to our Gryphon Diablo 333, sat down… and within about thirty seconds we were right back in that unmistakable Harbeth happy place.

Design & Setup

Like all Harbeth designs, the M40.5 XD2 takes time to show its best. The company’s proprietary RADIAL™ cone material, a highly engineered polymer developed in-house, starts out quite stiff and benefits from a substantial running-in period. Expect roughly 150–200 hours before everything fully opens up.

The M40.5 XD2 is a large three-way, front-ported standmount loudspeaker featuring a 25mm ferrofluid-cooled soft-dome tweeter, a 200mm RADIAL midrange driver and a 300mm RADIAL bass driver. Rated at around 86dB sensitivity with a nominal 6-ohm load, they’re not especially difficult to drive, but they absolutely reward high-quality amplification with generous current delivery.

Physically, these are substantial speakers at approximately 750mm (H) × 432mm (W) × 388mm (D). Proper stands are essential, ideally open-frame designs that position the tweeter at ear height and allow the cabinet to breathe.

Harbeth quotes bass extension to around 35Hz, but in a well-driven system they genuinely feel deeper, controlled, weighty and remarkably physical.

So… How Do They Sound?

As expected, the midrange remains the star of the show. Voices and acoustic instruments sound uncannily natural, textured, dimensional and emotionally convincing in a way few speakers manage.

Compared with earlier generations, the presentation feels more modern. There’s noticeably more openness through the treble, better air and separation, and bass that is tighter, faster and more authoritative. Unless you're a basshead, you can easily run these without subwoofers.

That famous Harbeth cabinet bloom is still present, but now better judged. Not eliminated, just refined. It no longer draws attention to itself, yet it continues to provide the tonal density and musical flow that makes Harbeths so addictive.

They’re slightly less warm than previous versions, but unmistakably Harbeth: lush without being slow, detailed without becoming analytical, and endlessly easy to listen to for hours.

Value & Final Thoughts

At roughly £15,000–£16,000 depending on finish, the M40.5 XD2 certainly isn’t an impulse purchase. But when compared with similarly capable large reference speakers, the value becomes surprisingly clear.

What Harbeth has achieved here is impressive: evolving a legendary design without losing its identity. The musicality remains intact, while resolution, control and balance have all moved forward.

The result is a speaker that sounds unmistakably Harbeth… just more complete.

And for us? It feels like coming home.