Eau Rouge CFRP Power Box with 6 Outlets ER-PBOX

Unparalleled silence and energy created by high-elasticity CFRP × pure copper × meticulously designed structure

The ER-PBOX is a power box developed to bring the 'overwhelming sense of energy,' 'richness of sound,' 'unwavering silence,' and 'expansive range'—previously only attainable with Eau Rouge's high-end models—within reach at a more accessible price range.
The chassis of this unit uses the highest-grade, high-elasticity carbon fiber, which sets it apart from ordinary CFRP, and employs a hybrid structure that optimally combines multiple types of carbon fibers. By maximizing the potential of the materials, it achieves unmatched rigidity and vibration damping performance.

"CFRP for acoustics" structure, optimized layer by layer

While CFRP is inherently an excellent material for vibration damping, Eau Rouge's proprietary technology goes even further. Different types of carbon fibers are used for each surface, with careful tuning of the layering direction, resin amount, and thickness from 3mm to 8mm. This thoroughly suppresses internal resonance peaks, resulting in an extremely quiet chassis that almost completely eliminates the inevitable 'box sound' typical of power boxes.
The material itself increases sound density, delivers energy smoothly, and simultaneously absorbs unwanted vibrations, creating a sense of silence as if the background disappears entirely.

Uncompromising power line built with pure copper screws × American Electric 7110GD

The bottom is secured with custom 'pure copper solid screws,' offering excellent acoustic and electrical properties. They balance good conductivity with smooth resonance, creating a natural soundstage that combines delicacy and power.
outletIt uses the American Electric 7110GD, well-regarded even for professional use. Its firm hold and low-impedance contacts significantly contribute to stable current supply and dynamic responsiveness.

Internal wiring uses 40-strand ultra-fine pure copper to preserve the lifelike quality of music

The internal wiring is composed of 40 strands of 0.28mm ultra-fine pure copper wires, designed to deliver the vitality of music as it is.High-FidelityUsing cables. We pursue the balance between the sense of energy when power is supplied and the delicate nuances in quiet passages.
All terminals are carefully terminated with Eau Rouge's proprietary lead-free “silver + copper solder,” minimizing sound distortion and information loss to the utmost.

The sound that could only be experienced on high-end models around 300,000 yen is concentrated here.

The sound characteristics of the ER-PBOX are clearly identical to the flagship models Eau Rouge has developed over many years.
Smooth highs, low-centered and stable lows, rich mids, and a background silence that can be called pitch-black.
It functions as an "audio quality component" that elevates the entire system one level beyond a mere power accessory.

Vibration Control and Quietness of the CFRP Enclosure

• What surprised me most when I tried replacing my power box with the CFRP enclosure was how immediately quiet the background became.
  Not only external vibrations,outletbut it also seems to absorb even the tiniest vibrations transmitted through it, making the faint unrest behind the music disappear. With the noise floor lowered, the sound seems to naturally merge into the air, truly enhancing the "quality of silence." Thanks to that, the contours of sound images become remarkably clear.
  
• Distortion and incidental noise vanish, boundaries become crisp, and the positions of instruments are seen more clearly.
  

Improved Speed and Dynamics

• With resonance suppressed, the responsiveness of the power supply is noticeably improved.
  The low end tightens, the overall speed of the sound increases, and the rhythm becomes sharper. The low frequencies not only drop but also feel "alive" and active, which is very satisfying. Furthermore, dynamics are greatly enhanced. Transitions from soft to loud are smooth, adding a natural sense of vitality to the music. It really makes you realize how much the sound changes when the power becomes clean.
  

Soundstage Expression and Neutrality

• With increased quietness, the expansion of the soundstage also changes significantly.
  Not only does the sound become wider horizontally, but it also gains depth, making the three-dimensional space naturally emerge. The positioning is clear, so you can easily tell exactly where each instrument is within the music.
  
• This power box also leaves a good impression by not oddly altering the tone. It has no tendency to boost any specific frequency range, making it very neutral. It gives the impression of drawing out the natural charm of the equipment's sound exactly as it is.