Meridian Audio 556 - Manual (Page 5)

Introduction
I
n choosing the 556 Stereo Power Amplifier you have acquired a
component that combines major advances in audio and engineering
design.
The 556 Stereo Power Amplifier uses a unique feedback topology and
precision local error correction system. It is designed and constructed in
dual mono format, including a massive twin wound toroidal transformer,
and the unit has full thermal, load, and DC protection.
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.