Spirit Torino IEM Twin Pulse Beryllium Review

Spirit Torino IEM Twin Pulse Beryllium review featured

This is an in-depth review of the Spirit Torino IEM Twin Pulse Beryllium. As the name suggests, this is an IEM and features dual 10mm beryllium-coated dynamic drivers. The price is €1,000 or $1,077.

Disclaimer: This sample was provided by Spirit Torino for an honest review. All observations and opinions here are my own based on my experience with the product.

Spirit Torino IEM Twin Pulse Beryllium Review
Spacious, rich, resonant and engaging, the Spirit Torino IEM Twin Pulse Beryllium is an outstanding IEM debut.
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Transparent, spacious sound
Captivating bass depth and layering
Fantastic midrange texture
Unique and stylish design
Strong technical performance
Very tip/seal dependent
Some of the shell edges are a bit sharp
Our Score

Spirit Torino IEM Twin Pulse Beryllium

In the Box

  • IEM Twin Pulse Beryllium IEMs
  • Detachable 0.78mm 2-pin cable with 3.5mm termination
  • Detachable 0.78mm 2-pin cable with 4.4mm termination
  • High-quality leather case
  • 3 sets of tuning filters
  • 3x pairs of foam eartips
  • 3x pairs of silicone eartips
  • 1x pair of silicone double-flange eartips
  • 3.5mm to 6.35mm adapter
  • Cleaning brush


One thing you can say about the design of this IEM is that it’s unique. However, if you are familiar with high-end headphones and Spirit Torino headphones in particular, you’ll know exactly where the inspiration for this design came from (hint: Valkyria Titanium).

The shells are CNC-crafted from aluminium and as a result, they are robust while remaining very lightweight. They’re bullet-shaped and fitted with 2-pin sockets. The rear face of the shells has an outer spiral shape with a star pattern in the centre. Within this open star pattern, you can see the Texalium composite inserts, which are part of the Micro Ventilation Pad System used to “calibrate the complex interplay of pressures generated in the acoustic chambers of the Twin Pulse system”.

IEM Twin Pulse Beryllium design

Internally, the IEM Twin Pulse Beryllium features dual 10mm beryllium-coated dynamic drivers in a patented Twin Pulse scaled isobaric system. A lot of complex engineering went into the design and build of this IEM. I highly recommend you check the official page for all the technical details here.

In regards to comfort, the IEMs score highly, thanks to being lightweight and adopting bullet-shaped shells. The passive noise isolation is below average, so the Twin Pulse Beryllium works best in quieter controlled environments. They can be worn cable down or over-ear, however, over-ear is the only option if you’re using either of the included stock cables (details below).

The 2 included cables

There are 2 cables provided in the box. Both are the same Litz SPC (Silver-plated Copper) except that one has a 3.5mm termination and the other is 4.4mm. They’re high-quality cables and handle well. One thing I dislike about the cables is the pre-formed earhooks that force you to wear the IEMs over-ear. The option to wear them cable down would be appreciated.

IEM Twin Pulse Beryllium shells


Gear used for testing includes the SMSL DO300EX, Soundaware M2Pro and the Cayin RU6. IEM Twin Pulse Beryllium does not require a lot of power to drive but it scales well so it’s worth pairing it with a quality source.

In regards to the sound signature, this IEM sounds just as unique as it looks. My initial observation was the spacious and airy yet grounded sound profile, complemented by a well-defined body and note density. It’s finely tuned for precise timbre and tone reproduction but remains engaging and musical.

A Note on Filters

The three included filter sets affect the bass and lower midrange levels. The red and black filters are approximately +3dB and -3dB respectively compared to the default grey filters.

For the most part, I like the red filters the most for their added bass response and the extra body and warmth in guitars, pianos and vocals. Having said that, I also enjoy the grey filters for critical listening and specific music genres like classical and acoustic. The sound description below is based primarily on the grey filter set.

IEM Twin Pulse Beryllium review featured
Spirit Torino IEM Twin Pulse Beryllium filters.

The bass is visceral yet fairly neutral in quantity (with the grey filter). It somehow manages to feel authoritative and warm without being boosted or dominant and I believe this is in part due to the isobaric driver setup. These IEMs create a more complex and textured bass sound, adding quality and depth perception.

The bass response of the IEM Twin Pulse Beryllium is remarkably versatile, adapting itself to the nuances of each recording. It exhibits a range that spans from tight and rapid to deep and resonant. With the red filters engaged, even dedicated bass heads would find the level of physicality in the low frequencies satisfying. Listening to the bass in Synthetic Epiphany’s “Icarus” (commencing at 1:28), I could almost palpably sense the bass vibrations coursing from the crown of my head down to the tips of my toes.


The Twin Pulse Beryllium delivers a transparent, textured and highly-resolving midrange. It creates clean space between instruments and vocals, resulting in an overall resolution of the utmost calibre.

Meanwhile, the timbre is faithfully reproduced, preserving the authentic tonal signature of the source material. This combination of textural allure and timbral accuracy creates a midrange that is not only pleasing to the ears but also sounds completely natural and lifelike. It’s as though you’re sitting right in front of a large stage, watching a live performance.

I was thoroughly impressed with the tactile richness and depth of the electric guitars in Nighttimeproject’s ‘Embers.’ The texture is meticulously crafted, offering a gratifying tactility that adds a layer of dimensionality to the music. The guitars resonate with a palpable warmth and intricacy that most other IEMs fail to capture.


The treble performance of the Twin Pulse Beryllium is characterized by a lifelike note weight and exceptional definition. While it may be the least emphasized among the three core frequencies, it has a high level of detail and airiness.

Furthermore, the treble is non-fatiguing, even with the black filters in place. I wouldn’t call it a sparkly treble but it has great clarity and good resolution and is perfectly balanced with the bass and midrange.

Soundstage and Technicalities

The soundstage dimensions are larger than average and can transport you to a virtual concert hall with great width, depth and height. Instrument separation is excellent, enabling a high level of resolution. You can distinctly discern the spatial relationships between different elements in the mix, thanks to some solid imaging capabilities.


The Spirit Torino IEM Twin Pulse Beryllium offers a distinct and captivating sound. Its spacious, airy sound profile, well-defined body, and note density make it stand out. The versatile filter options further enhance its appeal across different music genres. This one gets my full recommendation. Andrea and Spirit Torino have created a real gem for their first IEM release and I eagerly await to hear more from them in the future.

TECHNOLOGYTwin Pulse isobaric System
DRIVE2x 10mm dynamic micro drives beryllium Spirit
CABLE LENGTH1,2m Litz 392 cores OCC silver-plated + 8cores silver
HEADPHONE TYPEIn-ear monitor
FREQUENCY RESPONSE14-33.000 hz calibrated on isophonic curves
WEIGTH (without cable)6 gr
WEIGHT (without cable)114 dB@1k HZ, 1mW
TIPSMemory foam and  silicon 

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