Outline AC 4 Ultra-Compact 4″ Passive Speaker (White)

The Outline AC 4 (also known as Charlie 4) redefines what’s possible from an ultra-compact loudspeaker. This palm-sized powerhouse delivers rich, natural audio with exceptional intelligibility. Despite measuring just 120mm cubed and weighing only 1.55kg, the AC 4 punches far above its weight class.

Precision Italian Engineering

At the heart of the AC 4 lies a brand new 4-inch full-range driver. Outline’s engineers custom-designed this transducer exclusively for this product. This 100% Italian-made unit applies top-tier audio engineering to a remarkably compact package.

Moreover, the single-driver design eliminates crossover-induced phase issues. This delivers the most natural and uncoloured sound possible. Additionally, the innovative membrane design dramatically improves off-axis performance. Therefore, you get consistent audio quality throughout the listening area.

Built for Professional Applications

The AC 4 works specifically with professional power amplifiers. It delivers an impressive 118 dB SPL maximum output. Furthermore, the speaker handles 70W continuous (280W peak) with ease. This provides power and reliability that belies its small size.

The 16-ohm impedance makes it ideal for distributed audio systems. Consequently, you can pair it perfectly with Outline’s L3000 power amplifier. Alternatively, use any professional amplifier in your existing setup.

Robust Construction

The AC 4 features HCDF (Hydrophobic Compact Density Fiber) cabinet construction. This ensures reliable operation even in challenging conditions. What’s more, the distinctive O-rings at the front and rear provide vibration damping. They also stabilize and protect the enclosure from irregular mounting surfaces.

The cabinet is available in black or white textured finish. Custom RAL colours are available upon request. Thus, it blends seamlessly into any installation setting.

Versatile Mounting Solutions

Every AC 4 includes a custom-designed mounting bracket. This bracket provides maximum installation flexibility. It secures via M6 bolts into threaded inserts in the speaker.

Additionally, the bracket’s adjustable design allows secure mounting on virtually any surface. The speaker features multiple mounting points for various rigging setups. The compact design and lightweight build make installation effortless.

Key Features

• Custom Italian-engineered transducer designed exclusively for AC 4
• Single-driver design eliminates crossover phase issues for natural sound
• Fits in the palm of your hand yet delivers professional-grade output
• Signature O-rings provide vibration damping and protect against irregular surfaces
• Ideal for museums, restaurants, lounges, conferences, and discrete installations
• Plug-and-play compatibility with Outline L3000 power amplifier
• Custom RAL colour finishes available on request for perfect aesthetic integration
• Improved off-axis performance ensures consistent audio throughout coverage area
• Professional-grade reliability from world-renowned Italian audio manufacturer
• Perfect for distributed audio systems requiring unobtrusive speaker placement