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Panoramica prodotto

The 255i is Perreaux's most powerful, most sophisticated integrated amplifier. It's performance and specifications are truly impressive, but hearing the 255i is when you will truly appreciate the quality engineering, design and craftsmanship. The 255i is the most advanced integrated amplifier Perreaux has ever produced.

Optional internal 32-bit/384kHz Digital to Analogue Converter (DAC) and Moving Magnet/Moving Coil (MM/MC) Phono Preamplifier modules ensure complete integration of digital source components (such as network music servers and set-top digital receivers), as well as turntables, into a high-performance system.


Specifiche tecniche

Dimensions

 
Width: 426mm (16.8")
Depth: 344mm (13.5")
Height: 149mm (5.9")
Weight: 25kg (55lb)

Amplifier

 
Rated Power Output (per channel): 250W into 8Ω
500W into 4Ω
Maximum Power Output (prior to clipping, per channel): 360W into 8Ω
530W into 4Ω
Total Harmonic Distortion + Noise
 Typically: 
 20Hz to 20kHz:

0.002% @ 1kHz, 250W into 8Ω 
0.010%, 250W into 8Ω
Frequency Response
 20Hz to 20kHz:
 5Hz to 60kHz:

+0.00dB, -0.15dB
+0.00dB, -0.50dB
Damping Factor: 800 @ 1kHz, 250W into 8Ω
Signal to Noise Ratio (unweighted): better than 98dB, ref. 250W

Preamplifier

 
Input Impedance
Unbalanced:
Balanced:

12kΩ
22kΩ
Input Overload
Unbalanced:
Balanced:

8Vrms
8Vrms
Volume Control Range: -95.5dB to +31.5dB
Volume Control Resolution: 0.5dB per step
Input Volume Trim Range: ±40dB
Balance Resolution: 0.5dB
Balance Range: ±40dB

Headphone Amplifier

 
Headphone Rated Power Output: 1.0W into 32Ω
150mW into 300Ω

Headphone Total Harmonic Distortion + Noise

Typically:
20Hz to 20kHz:
0.001% @ 1kHz, 1.0W into 32Ω
less than 0.002%, 1.0W into 32Ω
Headphone Volume Trim Range: ±40dB

255i DAC Module Specifications

Digital Inputs: 2 SPDIF Coax (RCA)

2 SPDIF Optical (Toslink)
1 USB (Type B)

Chipsets: ES9038PRO Sabre DAC / XMOS chipset solution (32 bit / 140db noise floor)
Input Sample Rate: 32, 44.1, 48, 88.2, 96, 176.4, 192kHz (Coax, Optical)
32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz /  DSD 64, 128, 256  (USB)
Input Word Length (maximum): 32-bit (Coax, Optical)
32-bit (USB)
Input Impedance: 75Ω (Coax)
Transformer Coupled
Coax:
Optical:
USB:

Yes
No
Asynchronous and Galvanically Isolated

Analogue Section

 
Digital to Analogue Conversion: 32-bit/384kHz
Output Voltage: 2.0Vrms @ 0dBFS
Total Harmonic Distortion + Noise 0.002%, 20Hz-20kHz @ 0dBFS

Frequency Response

20Hz to 20kHz:
5Hz to 94kHz:

+0.0dB, -0.1dB
+0.0dB, -3.0dB

Dynamic Range (unweighted): better than 115dB @ 0dBFS
Signal to Noise Ratio (unweighted): better than 115dB @ 0dBFS
Channel Separation: better than 110dB @ 0dBFS
Stop Band: 105kHz
Stop Band Attenuation: 125dB

255i Phono Module Specifications

Input Impedance
Low Gain (MM):
High Gain (MC):

47kΩ
100Ω
Input Capacitance:

22pF

Gain
Low Gain (MM):
High Gain (MC):

40dB
60dB

Total Harmonic Distortion + Noise
Typically:
20Hz to 20kHz:


0.002% @ 1kHz, low gain setting
less than 0.010%, low gain setting
RIAA Accuracy: ±0.5dB, 20Hz-20kHz
Signal to Noise Ratio (unweighted):

better than 85dB, low gain setting