First, through high-speed computer simulation, this new input stage was developed with an input impedance of up to 1MΩ. Such a high input impedance makes the pre-stage matching easier, and lowers harmonic distortion and phase delay. According to the original manufacturer, Evolution One is the first with an input impedance of up to 1MΩClass D amplifier. The power supply has also been changed. The official website only proposes this brand new power supply to provide a cleaner and stable power supply. According to a telephone interview conducted by the editorial department, the power supply originally used in Reference 20 is a switching power supply that NuPrime is proud of. This time it has been changed to a linear power supply. It must have a great impact on the sound.
Evolution One still uses Class D amplification, but it is the latest amplification module developed by NuPrime. Its switching frequency is as high as 700KHz. It is currently the highest and fastest among the Class D amplification modules developed by NuPrime. The power supply to the amplifier module used general wiring in the past, but Evolution One uses thick copper foil for connection, which has better conduction performance than general wiring.
Mono design, although the chassis is the same as the previous Reference 20, the connotation is quite different. The output power has been increased by 20%. When facing an 8 ohm load, the Evolution One has 240W RMS continuous output on each side, the load impedance is reduced to 4 ohms, and the power is increased to 330W. There are one set of XLR balanced and RCA single-ended input terminals.
NuPrime Evolution One
Type: Mono rear stage
Output power: 240 watts(8 ohm load)330 watts(4 ohm load)
Peak output: 285 watts(8 ohm load), 390 watts(4 ohm load)
Input terminal: RCA x1; XLR x1
Input impedance: 1M ohm
Gain: x 28
Signal to noise ratio: 91dB @ 10W
Frequency response: 0-50KHz (-3dB)
Total harmonic distortion: 0.01%
Power specification: 115 VAC / 230 VAC switchable
Standby power consumption: 1.6W @ 115V, 1.7W @ 230V
Dimensions: 57 x 430 x 375 mm
Net weight: 7 kg catty
Color: black, silver