The RA180 is a state-of-the-art integrated amplifier using the latest innovative technologies. Power damping and dead times were reduced to 1/10 or less. Linearity was dramatically improved to create a near-perfect sound that transcends the boundaries between digital and analog. Enjoy the pure sound of nature provided by the RA 180.

The amplifier has developed from Class A to AB to Class D. Class AB was developed to improve the high heat generation and low efficiency of A. Class D has higher efficiency and higher output than AB, and also significantly improved S/N and THD characteristics compared to A and AB. However, the sound quality has been evaluated as inferior to A/AB due to the limitations of the digital circuit. The GaN class AD amplifier developed by HiFi ROSE has dramatically improved the problems of the existing Class D by applying innovative new materials.

Class D amplifiers have a topology that theoretically provides a perfect linear output at 0% distortion and 100% power efficiency. In order to achieve this, the switching action requires high speed and accuracy. However, previous products were weak compared to Class A/AB in the linearity aspect due to the limitations of Silicon -- .. Which had couldn t oroduce a smooth and natural soundi In the RA180, a new material, GaN FET, was used instead of Silicon FET to solve this problem. The dead time was dramatically Improved lo 1/10 or less, and a nearly perfect linear  output  was

realized with a switching speed close to zero. This linearity goes beyond the Class D limits and produces a smooth  and natural sound, like an analog amplifier.

The RA 180 consists of two modules: one AMP module specialized for stable mid-bass and balance. and another specialized for smooth high-pitched and super tweeter areas. Each AMP module supports 200 W (8 Q) and can output up to 400 W per channel. When two independent modules are connected to a speaker's high and low frequencies separately, the driving force can be greatly improved without being  affected by a counter electro-motive force. BTL mode combines two independent modules for rich, balanced sound.