Stenheim Alumine Five SX Edition Floorstanding Speakers

Alumine Five SX & LE

In 2024, Stenheim introduced its new Alumine Five Platform for the Alumine Five models. This elegant aluminium plinth is machined from solid aluminium and achieves the same effect as the Reference Platform developed for the Reference series, increasing stability and making fine-tuning the set-up far simpler. The spikes are easily adjusted with an allen key from above, enabling the precise height and rake of the platform to be dialed in. Different sets of spike ends can be selected to suit different floor types, from delicate wood to deep carpet. Sound is also improved thanks to the superior vibration damping that the Alumine Five Platform offers. The Platform can be retrofitted to any Alumine Five.

The Alumine Five SX is derived from the award-winning Alumine Five SE, itself a version of the Alumine Five with increased specification including top of the range crossover components, binding posts from the Reference range and enhanced internal wiring. The Alumine Five SX is additionally equipped with a room control panel at the rear, a feature originally seen on the Reference Ultime Two model, which enables different bass-treble profiles to be selected to adjust for room acoustics. Sound quality is yet further enhanced by a new chassis connector which allows the speaker to be connected to a third-party virtual grounding system. The anodized tweeter horn can be ordered to match the side bars in gold, silver, red or black. An embroidered leather top baffle is available as an option.

This phenomenal speaker is then set upon the Alumine Five platform to complete the Alumine Five SX package. For the ultimate Alumine Five, the Alumine Five LE is a limited edition of the Alumine Five SX, produced in a single run of only 10 pairs. Over and above the Five SX’s impressive specifications, the Five LE model boasts some luxury cosmetic appointments. Only available in Full Black, its tweeter horn, side bars, platform details and spike covers are gilded in gold leaf. The top front baffle is covered in leather with a gold embroidered Stenheim logo. The rear baffle is adorned with a Stenheim emblem. An optional three-part flight case is available.

Like all Stenheim speakers, the Alumine Five SX and Alumine Five LE are designed and hand-built to order in Switzerland. They are a 3-way design featuring crossovers engineered with the finest quality components from boutique suppliers such as Mundorf and Jantzen and are equipped with highly efficient custom-built drivers (94 dB) enabling a wide variety of amplification to be used. The Five SX and Five LE models are a further step in Stenheim’s mission of providing the ultimate in loudspeaker performance for discerning music lovers and top the Alumine range. 

Following the critical and commercial success of the Alumine Two was no easy task. Building a bigger, more ambitious speaker that still maintained the Two’s sense of musical articulation, coherence and communication? That’s a serious challenge. But it’s a challenge that the Alumine Five took up and mastered in spectacular fashion.

Even a brief glance will reveal the shared DNA: the classical proportions of the elegant, thin-wall cabinet; the drivers that are just a little larger than you expect; the clean styling and absence of visible fixings. There’s no doubt that this is a Stenheim speaker – even before you listen to it. 

That DNA goes much deeper than the way the Alumine Five looks. It informs every aspect of its design and every aspect of its remarkable performance. Far bigger than the Alumine Two, the thinking and technology in the Five is almost identical. The latest, treated pulp cone bass and mid drivers are paired with a sophisticated fabric dome tweeter. The crossover relies on the same carefully engineered topology, ensuring smooth driver transitions, a non-reactive load and the absence of damaging out-of-band artefacts. The beautifully engineered cabinet is precision machined from aluminium plates, with internal baffles and braces to further increase rigidity and stainless-steel hardware to ensure consistency. The twin slot ports and braces are carefully radiused to reduce turbulence in the enclosed air volume. The cabinet walls are treated with the same, multi-layered, low-volume damping materials to kill mechanical resonance.

Even more importantly – and despite the added complexity of its three-way topology – the crossover has been exhaustively engineered and relentlessly fine-tuned to maintain the phase-coherence and non-reactive, low-loss load characteristics that are the foundation of the Alumine Two’s lucid clarity and naturally organized musical presentation. 

The result is a speaker that offers the same easy load, the same low stored energy and the same low coloration levels. But it combines them with even higher efficiency and wider bandwidth – to potent musical effect. Despite being the same size as (or smaller than) its immediate competition, the advantages of thin-wall cabinet construction mean that in acoustic terms, the Alumine Five is actually much larger, while the twin 10” bass drivers provide a greater swept area. Together those things add up to a massive musical advantage. A speaker that goes deeper, louder, quicker, provides more detail and more dynamic range – and is actually easier to drive! 

You hear it in the musical scale and power that the Alumine Fives can deliver. You also hear it in their agile, responsive and articulate performance. Their flat impedance characteristic and high sensitivity make them easy to control, giving your amplifier a far easier job. That allows the system to preserve the micro-dynamic nuance and subtleties in the playing, the relationship between instruments, the emotional range in a singer’s voice. The Alumine Fives embrace the performance and carry it, alive and (when necessary) kicking, right into your listening room.

Along with all that musical and acoustical power and energy you also get responsivity. The Alumine Five’s bass drivers are independently loaded and slot-ported, offering not just superior bandwidth and dynamics but remarkable control and in-room behaviour. The stainless steel spikes and footers ensure not just stable placement and effective mechanical grounding, but precise control over the speakers’ height and attitude, critical factors in maximising their performance potential.

At Stenheim, we don’t just want to know what our speakers are capable of. We want each and every customer to experience their full performance for themselves.  

These are speakers that are designed right from the start to work with your system, to work with your room, with one goal in mind: delivering more music from your recordings – all of your recordings, all of the time. Big enough to handle the most demanding music, with a natural sense of scale and musical purpose, the Alumine Five can go just as small and intimate as the musicians, the performance and the recording demands. It’s not just as much speaker as many listeners will ever need – it’s more music than many of them thought possible.

Specifications

Passive 3-way floor-standing speakers

2x 25cm (10”) woofers, 1x 16.5cm (6.5”) medium driver, 1x 2.6cm (1”) soft dome tweeter

Front laminar port bass reflex design

Full aluminium construction

4 independent chambers

Phase coherent crossover employing high grade, audiophile components

Frequency response : 28Hz to 35kHz

Sensitivity : 94dB SPL, half space

Power handling : 200W RMS, 400W Peak

Minimum recommended power: 20W

Nominal impedance: 8 Ohms (minimum 3 Ohms)

Dimensions: 

Five SX and Five LE with platform: Width 48cm (19”) x Depth 38cm (15”) x Height 127-130cm (50-51.2”) 

Weight: Five SX and LE with platform: 139kg (306lbs) each

Available in metallic Light Grey or Dark Grey with black front and rear

Warranty: 5 years