The 255i is the new Flagship Perreaux amplifier, and employs a host of upgrades over the old 250i model.
 
The Worlds Most Powerful Integrated Amplifier*

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 / DSD Digital to Analogue Converter (Sabre ESS 9038 Pro 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.

*In reference to the 255i as a Class-AB integrated amplifier.

Features

• High Power Design
• High-current Custom Power Supply
• High Damping Factor
• Advanced Microprocessor Control
• Advanced Stepped Volume Control
• Advanced Lossless Stepped Off-Set Balance Control
• Non-Invasive Protection
• Internal Headphone Amplifier
• Dual sets of speaker binding posts
• Balanced (XLR) input
• Home Theatre/Pass-Through Loop
• IR (infrared) input and output
• Isolation Feet Options
• USB Digital to Analogue Converter - Sabre ESS 9038 Pro DSD (optional)
• MM/MC Phono Stage (optional) 

Technical data

Dimensions	426mm (16.8") x 344mm (13.5") x 149mm (4.0") (W x D xH) Weight: 25kg (55lb)
Amplifier
Rated Power Output (per channel):	320W into 8 500W into 4
Maximum Power Output (prior to clipping, per channel):	360W into 8 530W into 4
Total Harmonic Distortion + Noise	Typically: 0.002% @ 1kHz, 250W into 8 20Hz to 20kHz: 0.010%, 250W into 8
Frequency Response	20Hz to 20kHz: +0.00dB, -0.15dB 5Hz to 60kHz: +0.00dB, -0.50dB
Damping Factor:	800 @ 1kHz, 250W into 8
Signal to Noise Ratio (unweighted):	better than 98dB, ref. 250W
Preamplifier
Input Impedance	Unbalanced: 12k ohm Balanced: 22k ohm
Input Overload	Unbalanced: 8Vrms Balanced: 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 32 150mW into 300
Headphone Total Harmonic Distortion + Noise	Typically: 0.001% @ 1kHz, 1.0W into 32 20Hz to 20kHz: less than 0.002%, 1.0W into 32
Headphone Volume Trim Range:	40dB
Eloquence DSD DAC Module Specifications
Digital Inputs:	2 SPDIF Coax (BNC) 2 SPDIF Optical (Toslink) 1 USB (Type B)
Input Sample Rate:	32, 44.1, 48, 88.2, 96, 176.4, 192kHz (Coax) 32, 44.1, 48, 88.2, 96 (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:	75 ohm (Coax)
Transformer Coupled	Coax: Yes Optical: No USB: Asynchronous and Galvanically Isolated
Analogue Section
Digital to Analogue Conversion:	32-bit / 384 kHz
Output Voltage:	2.0Vrms @ 0dBFS
Total Harmonic Distortion + Noise	Typically: 0.002%, 20Hz-20kHz @ 0dBFS
Frequency Response	20Hz to 20kHz: +0.0dB, -0.1dB 5Hz to 94kHz: +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
Eloquence Phono Module Specifications
Input Impedance:	Low Gain (MM): 47k Ohms High Gain (MC): 100 Ohms
Input Capacitance:	22pF
Gain	Low Gain (MM): 40dB High Gain (MC): 60dB
Total Harmonic Distortion (THD+N):	Typically: 0.002% @ 1kHz, low gain setting 20Hz to 20kHz: less than 0.010%, low gain setting
RIAA Accuracy:	0.5dB, 20Hz-20kHz
Signal to Noise Ratio (unweighted):	better than 85dB, low gain setting