Class D amplifiers are, in theory, completely linear with 0% distortion and 100% power efficiency. It is a topology that provides the output, and to implement it, speed and accuracy must be a prerequisite. However, the usual class D amplifiers have poor linearity due to the limitation of the switching element (silicon FET) and are inferior compared to those that operate in class A/AB, which produce, as a rule, a softer and smoother sound. natural. In the HiFi ROSE RA180, this problem has been solved with new materials. Instead of low-quality silicon FET chips, gallium nitride FET chips are used, which clearly improves linearity, adding to the intrinsic advantages of class D, the improved, smoother and more natural sound of class A/AB.
Each of the four mono channels of the RA180 amplifier is equipped with an AMP module specialized in bass stability and balance and a module specialized in treble smoothness and the super tweeter area, with 2 modules. Each AMP module supports 200W (8 Ohms) and can output up to 400W per channel. There are 2 independent modules that divide the high and low frequencies respectively, so that the speaker and, when connected, the Bi-Amping has a driving force that is increased without being affected by the subsequent electromotive force. BTL mode combines the output of two independent modules to produce a thicker, more balanced sound.
Each channel of the RA180 amplifier is equipped with an AMP module specialized in bass and balance and a module specialized in treble and super tweeter. Each AMP module supports 200W (8 Ohms) and can output up to 400W per channel. The two independent modules per channel divide the high and low frequencies respectively so that the speaker is bi-amplified.
The phono amplifier section of the RA180 is intended to reproduce with maximum precision. It is designed to be compatible with the vast majority of turntables on the market, regardless of the capsule they mount, adapting perfectly to their characteristics thanks to its built-in adjustment parameters.
The power supply circuitry, developed exclusively for the HiFi Rose RA180, is designed with 4th generation SiC FET technology to provide high performance and great efficiency compared to a typical Si FET. In addition, HiFi Rose has developed a 2.5KW power factor circuit (PFC) and a large capacity capacitor. This is designed so that the unit is not affected by sudden load fluctuations. The power unit is developed to support a damping factor of 200 and a total of 1000W of power.
The HiFi Rose RA180 integrated amplifier features three line inputs, one balanced input and one phono input. The volume control is motorized and adjustable remotely. The tone control allows you to adjust the treble, bass and balance. There are also controls for active crossover, AB speaker switching (for switching between two connected pairs), a subsonic switch, a sound reduction switch, and an LED brightness adjustment switch. Pure Direct allows you to do without unbalanced input signal, tone control and active crossover.
Characteristics:
- Power: 800W, (400W x 2 or 200W x 4 channels).
- Frequency response: 12Hz to 100kHz.
- Active crossover with front panel controls
- Vumeter type indicators on the front panel per channel.
- Pure Direct mode so that the input signal is output as directly as possible to the speakers without modifications.
- Subsonic switch that blocks ultra-high frequency to avoid transmitting noise to the speaker.
- Control buttons for treble, bass and balance.
- Button on front panel for sound attenuation.
- Three-level adjustment selector for the lighting LEDs on the front panel.
- AB speaker selector that allows you to connect up to 4 speakers (pair A, pair B and A+B).
- Phono input for MM and MC type capsules with active equalization buttons on the front.
- Line inputs: 1 x balanced XLR and 3 x stereo RCa.
- Mono RCA output for active subwoofer.
- Remote control.
- Measurements: 43 x 35 x 11 cm.
- Weight: 16.7 kilos.
