Piega Ace 50 white (pack of 2)

Five years after the TMicro series, Piega is renewing its entry-level range with the Ace series. The Ace 50 is its flagship model: a floorstanding speaker barely 14 cm wide, clad in aluminium and crowned with the AMT ribbon tweeter that built the reputation of the Swiss brand. Behind this slender silhouette lies a three-way system capable of competing with much larger speakers.

Aluminium, curves and Swiss precision

Designer Stephan Hürlemann shaped the Ace 50 around a simple conviction: it’s the music that should dress the room, not the speaker itself. The extruded aluminium cabinet adopts an oval profile just 14 cm wide and 16 cm deep, with no visible screws or sharp edges. This rounded shape is not only aesthetic: it more effectively absorbs internal reflections and eliminates standing waves that colour the sound in conventional rectangular cabinets.

Choosing aluminium rather than traditional MDF allows the walls to be thinner while maintaining high rigidity. With identical external dimensions, the Ace 50 therefore offers a larger internal volume than a wooden speaker, which favours bass extension. The circular base, 25 cm in diameter and screwed to a central pillar, slightly raises the column and emphasizes its slender profile.

The range comes in three finishes: natural aluminium (silver), black anodized aluminium, or glossy white lacquer. Each version includes a matching fabric speaker grille that blends harmoniously with the speaker’s rounded profile.

Three-way design in a compact format

Despite its slim profile, the Ace 50 operates as a three-way design — an architecture usually found in much bulkier floorstanding models. Engineers Daniel Raimann and Roger Kessler have completely redesigned all the drivers for this new generation.

The two 120 mm MDS-B woofers located in the lower section work in parallel in a bass-reflex enclosure with a front-firing port. This layout allows for relatively close placement to walls without excessive bass boom. Piega claims an almost doubled acoustic power in the low-frequency range compared with the TMicro 60, resulting in bass that is both fuller and tighter.

The third 120 mm MDS driver, installed just below the tweeter, operates in a sealed chamber and handles the midrange up to around 4 kHz. This separation of roles allows each driver to work within its optimal range, limiting distortion and improving vocal coherence.

The AMT-1 tweeter, Piega’s sonic signature

The name Piega comes from the Italian word for “fold”, a direct reference to the tweeter technology that has defined the brand since its beginnings. The AMT-1 (Air Motion Transformer) uses a pleated 24 × 36 mm diaphragm combined with a high-purity neodymium magnetic motor.

Unlike dome tweeters that push air in a pistonic motion, the AMT compresses and expels air through the folding motion of its diaphragm. This mechanism delivers a fast transient response and particularly low distortion. The frequency response extends up to 40 kHz, making the Ace 50 compatible with high-resolution audio files.

The speaker’s narrow front baffle also contributes to the soundstage: by reducing unwanted reflections around the drivers, it allows the sound to detach naturally from the cabinet and project a wide stereo image, even when the speakers are placed relatively close together.

Everyday listening and home integration

The Ace 50 is suitable for amplifiers delivering between 20 and 150 watts into 4 ohms. Its sensitivity of 90 dB/W/m makes it relatively undemanding: a mid-range integrated amplifier is sufficient to drive it properly. It is well suited to medium-sized rooms — living rooms, offices, bedrooms — and can be used without a subwoofer in most setups.

For home cinema systems, the Ace 50 pairs with the Ace Center center speaker and Ace 30 satellites, which share the same drivers and sonic signature. There is also a wireless version, the Ace 50 Wireless, with built-in amplification and network connectivity.

Its modest weight of 12 kg and height of just over one metre make handling and installation easier, while the circular base provides solid stability on flat floors.

Technical specifications

Acoustic characteristics

• Recommended amplifier power: 20 – 150 W
• Sensitivity: 90 dB / W / m
• Nominal impedance: 4 Ω
• Frequency response: 45 Hz – 40 kHz
• Design principle: 3-way floorstanding system

Drivers

• Low and midrange drivers
  • 2 × 120 mm MDS-B (midbass)
  • 1 × 120 mm MDS (midbass)
• Ribbon tweeter
  • 1 × AMT-1

Physical characteristics

• Speaker dimensions (H × W × D): 104 × 14 × 16 cm
• Base dimensions: Ø 25 cm
• Weight: 12 kg

Connectivity

• Bi-wiring / bi-amping binding posts

Available finishes

• Silver aluminum with silver cloth grille
• Black anodized aluminum with black cloth grille
• White lacquer with white cloth grille