Description
Hifi Rose RSA180 : Integrated Amplifier
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.
New Concept Class AD Amplifier
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 AD Amplifier
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 required high speed and accuracy. However, previous products were weak compared to Class A/AB in the linearity aspect due to the limitations of silicon FET, which couldn’t produce a smooth and natural sounds. In the RA180, a new material, GaN FET, was used instead of Silicon FET to solve this problem. The dead time was dramatically improved to 1/10 or less, and a nearly perfect linear output was realised 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.
Specifications :
Amplifier Output
- 4Ω: 200W x 4ch (800W)
- 8Ω: 200W x 4ch (800W)
- BTL Mode On: 400W x 2ch (800W)
Imput Sensitivity
- Balance Imput: 2,000mV (200W x 4ch)
- Unbalance (Line 1, 2, 3) Input: 1,000mV (200W x 4ch)
- Phono (MM/MC) Input: 5mV/0.5mV (200W x 4ch)
Impedance Input
- Balance Input: 44kΩ
- Unbalance (Line 1, 2, 3) Input: 47kΩ
- Phono (MM/MC) Input: 47kΩ
Bandwidth (0dBr±3dB/8Ω)
- Speaker Output: 10Hz ~ 100kHz (100W x 2ch)
- H/F Speaking Output: 10Hz ~ 100kHz (100W x 2ch)
Frequency Respond (1W, 0±1dB/8Ω)
- Speaker Output: 10Hz ~ 100kHz (1W x 2ch)
- H/F Speaker Output: 10Hz ~ 100kHz (1W x 2ch)
THD Measure
- Balance & Unbalance (Line 1, 2, 3) Input: 0.006% (50W) (200W x 4ch)
Damping Factor
- Speaker & H/F Speaker Output: >150 (200W x 2ch)
Signal to Noise Ratio Measure (S/N)
- Balanced, Unbalanced/Phono MM: 108dB/106dB/79dB (MM) (200W x 4ch)
Impedance Output
- Speaker Output: 53mΩ (200W x 4ch)
Subsonic Filter with On/Off Switch
- -3dB: 53mΩ (200W x 4ch)
Tone Control with On/Off Switch
- Bass (100Hz)/Treble (10kHz): ±15dB (1W x 2ch (Speaker Output))
X-Over with On/Off Switch
- HPF (-3dB): 600Hz ~ (1W x 2ch(H/F Speaker Output))
Phono
- Turnover: Flat
- 300Hz (+7.7dB@100Hz)
- 400Hz (+11.7dB@100Hz)
- 500Hz (+13dB@100Hz) (RIAA)
- 700Hz (+14.5dB@100Hz)
- Roll-Off: Flat
- 1.6kHz (-16dB@10kHz)
- 2.1kHz (-13.7dB@10kHz) (RIAA)
- 3.18kHz (-11dB@10kHz)
- 3.4kHz (-8dB@10kHz)
- 6.36kHz (-5dB@10kHz)
Design
- Size: 430 (W) x 350 (D) x 110 (H) (Including feet: 430 (W) x 391 (D) x 130 (H) mm)
- Weight: 16.7kg
- Body: High Purity Aluminium
Power
- Power: SMPS (800W) (Maximum Output: 1,100W)
- Voltage: AC100-240V, 50/60Hz (Standby Mode Power Consumption < 0.5W)
Audio In/Out Setting
- Trigger: Trigger Voltage Can Be Turned On: 3.3V ~ 12V
Remote
- IR Input: 38 kHz Infrared Ray (Operating Distance Within 10m)
