The ECP-G4 from Emphaser is a 4-inch speaker set that impresses with innovative technologies. Key features include the CRYSTALGRAIN compound diaphragm of the woofer and the 25 mm fabric dome of the tweeter. The speaker set offers powerful strontium ferrite magnets and an Emphaser FlowMax aluminum die-cast basket for optimal sound stability. The crossover is specially designed to ensure the best possible phase alignment, while the two-stage level adjustment and high-quality components provide precise sound output. With a rated power handling of 60 watts RMS and a sensitivity of 84dB, the ECP-G4 delivers balanced sound performance in the frequency range from 95 Hz to 22 kHz. The package includes tweeters, woofers/midrange drivers, and crossovers.

The Woofer

The warmth of the GRAVITY sound is thanks to the new CRYSTALGRAIN compound diaphragm. It combines the high stiffness and damping effect of paper with the direct transient response of the quartz crystals applied on the top side. The diaphragm thickness is chosen to provide stability for powerful bass attacks and the necessary lightness for precise midrange. The durable surround ensures that the ECP-G4 does not lose any of its precise reproduction even at high levels and thus high diaphragm excursions. The clean, crisp bass foundation and its level capabilities are owed to the strong strontium ferrite magnets of the mid/woofer.

The carefully selected components are mounted on the minimally designed Emphaser FlowMax aluminum die-cast basket. The very open construction with delicate struts gives the rear-radiated sound maximum freedom and minimizes unwanted reflective surfaces that could affect the sound. Despite its delicate design, the construction offers maximum stability. Another innovation is the new Emphaser screw terminal: although very solidly built, it requires very little space and ensures secure signal transmission with its force-fit connection using massive hexagon screws and gold-plated contact surfaces.

The Tweeter

The 25 mm fabric dome tweeter impresses with its warm sound and can reproduce even the smallest musical details. The diaphragm geometry offers a uniform directivity pattern for excellent sound in various installation situations. Besides the low weight of diaphragm, surround, and voice coil, it is especially the deliberate omission of ferrofluid that makes the tweeter play so lively, spatial, and distortion-free. The protective grille offers high sound permeability and low reflections due to its very large opening area. The supplied mounting housing allows installation at two different radiation angles for perfect adaptation to the vehicle acoustics.

The Crossover

The components of the crossovers have been defined through intensive test series in the lab and in various vehicles to achieve the best possible phase alignment of the components with minimal space requirements. The result is authentic-sounding voices and instruments with precise stage imaging and impressive spatial depth. The crossovers are divided into a tweeter and woofer branch. This allows easy installation directly at the mounting location without the need to lay new cables across the vehicle.

Main Features Woofer

• 4 inch midrange driver
• Emphaser CRYSTALGRAIN compound diaphragm with inverted dustcap
• Emphaser FlowMax aluminum die-cast basket with optimized temperature management
• Strontium ferrite magnet
• Butyl rubber surround
• Two-layer copper wire voice coil wound on a heat-resistant aluminum voice coil former
• Durable Connex centering spider with integrated voice coil lead
• Emphaser screw terminal with gold-plated contact surfaces

Main Features Tweeter

• 25 mm fabric dome with neodymium magnet
• Housing with low installation depth
• Protective grille with very large opening area for high sound permeability and low reflections
• Mounting housing for installation at two different radiation angles

Main Features Crossovers

• 12 dB woofer / 12 dB tweeter filter
• Two-stage level adjustment for the tweeter
• Separate crossovers for tweeter and woofer for optimal installation convenience
• Use of high-quality air coils, MKP capacitors, and MOX resistors in the direct signal path
• Pre-assembled connection cables

Technical Specifications

• Rated power handling: 60 Watt RMS
• Nominal impedance: 4 Ohm
• Frequency response: 95 Hz – 22 kHz
• Sensitivity 1W/1m: 84dB
• Mounting diameter: 93 mm
• Mounting depth: 45 mm

Scope of delivery

• 2 tweeters
• 2 woofers/midrange drivers
• 4 crossovers
• Optional speaker cover: ESP-GR4