Meridian Reference 857

Frank Prowse Hi-Fi is your Meridian Lounge dealer for Perth & Western Australia.

Meridian’s most powerful reference two channel amplifier has been designed and built to deliver the best possible Hi-Res audio performance from any high-quality passive loudspeaker system. Its low-feedback construction provides ultra-low distortion, ensuring an unparalleled level of clarity and transparency across the audible range. Bridgeable to over 1.5Kw, the Meridian 857 features a totally new design for a Meridian power amplifier, borne out of extensive research, experience and a thorough understanding of psychoacoustic principles.

ERROR CORRECTION AND LINEARITY
The open-loop characteristics of an amplifier are crucial to its sound quality. The 857 design is intrinsically linear and uses error correction in the output stage to provide low open-loop output impedance. This allows the 857 to achieve impeccable measured performance and a high damping factor while only applying modest amounts of negative feedback.

‘SUPERBAL’
The use of shunt feedback to eliminate common mode distortion is well known. Meridian’s proprietary ‘Superbal’ circuitry brings this advantage to the balanced input, while also converting unbalanced signals to balanced as they enter the amplifier.

CONSTRUCTION
Includes five secondary transformer windings for maximum isolation between low power and high power parts. A ground plane design has also been used for optimal signal handling, while WBT output terminals have been provided to allow bi-wiring.

PRODUCT HIGHLIGHTS
Effortless power delivery of 500W per channel into four ohms and bridgeable to >1.5kW mono into four ohms.

Low-feedback construction provides ultra-low distortion, ensuring an unparalleled level of clarity and transparency across the audible range.

Balanced and unbalanced inputs are provided, with unbalanced inputs converted to balanced before they enter the amplifier using Meridian’s proprietary ‘Superbal’ technology.

Designed to operate in thermally hostile environments, including in-rack when the dedicated Meridian 857 rack mount variant is specified.

When in standby mode, a standing voltage is maintained, meaning that optimum performance can be achieved almost immediately after switching the Meridian 857 on.

Multilayer circuit boards – ensure the best electromagnetic performance.

New linear supply – for isolation from AC supply and increased durability and sound quality.

Non-ferrous chassis and panels – aluminium construction for magnetic linearity.

MERIDIAN REFERENCE 857 TWO CHANNEL POWER AMPLIFIER – AT A GLANCE