Meridian Audio 557 - Manual (Page 5)

Introduction
I
n choosing the 557 Stereo Power Amplifier you have acquired a
component that combines major advances in audio and engineering
design.
The 557 Stereo Power Amplifier uses a unique feedback topology and
precision local error correction system. It includes a massive twin wound
toroidal transformer, and the unit has full thermal, load, and DC protection.
The 557 Stereo Power Amplifier can also be operated in bridge mode, for
over three times the power output to a single loudspeaker.
This guide is designed to enable you to obtain the best possible results
from the unit in conjunction with the other units in your system.