Signal Projects Filtron CX – new player in Mecca highend studio in Czech rep
Post by zappa – Mecca Studio | October 20, 2025, 13:59
After years of experimenting with all kinds of power solutions — from standard power strips to active conditioners and isolation transformers — I’ve finally come across a product that truly surprised me: Signal Projects Filtron CX.
I honestly didn’t expect a passive power filter to bring such a profound calmness, resolution, and natural flow to the music — all without limiting energy or dynamics in any way.
Design & Construction
The Filtron CX is a completely passive power filter/distributor built exclusively with Signal Projects’ own in-house design solutions.
You won’t find any off-the-shelf components inside — every element is custom-made and hand-assembled: pure copper coils wound to specification, a “virtual ground” topology, and dual toroidal isolation that effectively suppresses both electromagnetic and RF noise.
The entire chassis is CNC-milled from a solid block of aluminum, perfectly shielded and damped.
Internal wiring uses 7N copper in a fully symmetrical topology.
Technically, the unit operates with ultra-low leakage current (below 0.7 mA @ 250V / 50Hz), which means zero current compression and full dynamic freedom even for high-power amplifiers.
It offers seven star-grounded outputs, each fully isolated — no daisy-chaining.
Weighing over 23 kg, it’s not your typical power strip — it’s a solid piece of precision metalwork and copper, where every design choice makes sense.
Listening Experience
System used:
- DAC: Aries Cerat Kassandra Reference II
- Speakers: Aries Cerat Symphonia
- Server/Transport: Pachanko Constellation Masterpiece
- Power filtering: Sroll Quantum (in series, analog/digital separated)
- Cables: Signal Projects Andromeda, Atlantis, UltraViolet (power & RCA)
I placed the Filtron CX between the wall outlet and my digital front-end (server + DAC).
The first impression was stunning: total silence between notes — music seemed to “emerge from nothing.” The subtle grain and residual tension I’d previously blamed on the power grid simply vanished.
Resolution: a huge leap in microdynamics — breathing, decays, tonal textures — everything became more intelligible and fluid.
Soundstage: wider, deeper, and most importantly, more stable — instruments had well-defined, three-dimensional presence.
Silence: a blacker, calmer background — not the artificial kind, but a natural, relaxed quietness that lets the music flow freely.
Bass: tighter, faster, more articulated — no bloat, no thinning, just precision and weight.
The overall character? Organic, effortless, and tonally superb.
Compared to common filters (Shunyata, Isotek, PS Audio), the Filtron CX doesn’t add any “effect.” It simply removes a veil between the source and amplifier — everything becomes smoother, clearer, and more natural.
Technical Notes
- Each outlet is independently filtered and star-grounded — no shared conductors.
- Purely passive design, no current limiting (rated up to 30A).
- The Virtual Ground circuit helps eliminate noise even in asymmetrical installations.
- Strongly recommended to pair it with Signal Projects’ own power cables — the synergy is clearly audible.
- Hand-built in Greece, each unit individually measured and certified.
Summary
The Signal Projects Filtron CX is a power filter for true high-end systems — showing just how much clean power influences sound quality.
It doesn’t impose its own character; it unlocks the potential of the entire system.
If you’re looking for a filter that:
- doesn’t restrict current or dynamics,
- keeps the sound open and natural,
- and delivers absolute clarity without sterility —
then the Filtron CX is absolutely worth auditioning.
For me, it’s the best passive power filtration I’ve ever heard — not just on paper, but in real listening sessions.
As the official distributor of Signal Projects in the Czech Republic, I might sound biased — but honestly, the Filtron CX would have impressed me even as a private listener. It changed my entire view of what power management can achieve.
Signal Projects approaches “Power Management” as a holistic concept — the way your entire system breathes together, both technically and materially. Their eleven product lines are designed to work in full synergy, and I can confirm that the more Signal Projects cables I integrated, the better the system sounded.
Last night I listened for over 10 hours straight — I simply couldn’t stop. Music I knew by heart revealed new layers and nuances I’d never noticed before.
The bar keeps rising.
As Stavros from Aries Cerat once told me with a smile, when I offered him cables from another brand:
Signal Projects — Music is the best.
