Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer Brands_Michi The E-380 realizes a 20%

The E-380 realizes a 20% increase in rated output power attributable to a reinforced power amplification stage and power supply

The power output of the RS150 has been doubled

The woofer has also been upgraded from a 4" to a 5-1/4" diameter driver

General  Metal Front Panel: Yes

DualView™ Power Output Meter

Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer Brands_Michi The E-380 realizes a 20%The Bowers & Wilkins ISW 4 is a high performance in wall subwoofer designed to integrate powerful low frequency reinforcement into discreet architectural audio systems. Equipped with dual 8 inch long throw drivers, it is engineered to move significant air volume, producing deep, impactful bass while remaining completely hidden within a wall cavity. Paired with a dedicated external amplification system, it is ideal for custom home theaters and premium