e i d u g r e s u Meridian 557 Stereo Power Amplifier
Sales and service in the UK Meridian Audio Ltd Stonehill Stukeley Meadows Sales and service in the USA Cambs PE18 6ED Meridian America Inc England 3800 Camp Creek Parkway Building 2400 Tel (01480) 52144 Suite 112 Fax (01480) 459934 Atlanta GA 30331 Digital Gramophone and Wireless Ltd Stonehill Stukeley Meadows World Wide Web http://www.meridian.co.
Contents Introduction 1 Introduces the 557 Stereo Power Amplifier, and provides an overview of the other products available in the Meridian Setting up the Stereo Power Amplifier 7 500 Series. Describes how to unpack, install, and use The Meridian 500 Series ........................ 2 the Stereo Power Amplifier, and explains Sample configurations ........................... 3 what you should do if your Stereo Power Specification and accessories ............... 6 Amplifier requires servicing.
iv Preface
Introduction In 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.
The Meridian 500 Series The Meridian 500 Series is a unique system of digital, analogue, 500 Series communications and video components designed to meet the demand for absolute quality, ease of use, and lasting value. The Meridian 500 Series includes a sophisticated communications link, to ensure that any configuration of units The flexibility of the Meridian 500 Series is such that you can will work together as a fully integrated system.
Sample configurations 508 Compact Disc Player 500 Compact Disc Transport DSP5000 A500 508 DSP5000 A500 502 500 557 504 504 562 The 500 Compact Disc Transport provides a precision digital converter, providing both digital and analogue outputs. output, and can drive DSP5000 Digital Loudspeakers directly.
566 20-bit Digital to Analogue Converter 502 Analogue Controller A500 A500 500 557 Introduction 566 4 502 The digital output provided by the 500 Compact Disc Transport The 502 Analogue Controller is a full function preamplifier for use can be decoded by the 566 20-bit Digital to Analogue converter with any analogue source, and includes balanced inputs to allow to provide a high-quality audio output for use with a you to take advantage of balanced sources, including the 566 conventional audio p
562V Multimedia Controller DSP6000 DSP6000 Satellite Video recorder 504 Television LaserDisc 500 562V conventional analogue sources such as the 504 FM Tuner and with the Meridian DSP6000 Digital Loudspeakers. video sound.
Specification and accessories Specification Available accessories Input 1.4V RMS. Output (stereo) Greater than 200W per channel into 8Ω. Greater than 300W per channel into 4Ω. Output (bridge) Greater than 390W into 16Ω. Greater than 650W into 8Ω. Greater than 950W into 4Ω. Distortion Less than 0.05%. Noise Less than -90dB. Finish Black textured enamel and glass. Heatsinks black painted aluminium. Dimensions 176mm x 400mm x 320mm Introduction (6.9" x 15.7" x 12.6"). 6 Weight 27kg.
Setting up the Stereo Power Amplifier This chapter explains how to install the Stereo Power Amplifier. It describes what you should find when you unpack the Stereo Power Amplifier, how you should connect it to your other audio equipment, and the siting constraints. You should not make any connections to the Stereo Power Amplifier or to any other component in your system whilst the AC power supply is connected and switched on.
Unpacking The 557 Stereo Power Amplifier comes in a box containing the Once set up, the Stereo Power Amplifier can be left switched on following components: as it consumes negligible power when not in use. ❍ 557 Stereo Power Amplifier. If you are not going to use the Stereo Power Amplifier for a ❍ 1 power cord. period of several days you should switch the unit completely off, ❍ 2 phono shorting plugs. at the back panel, and disconnect it from the AC power supply. ❍ This manual.
Connecting the Stereo Power Amplifier Back panel Input (R) Outputs (R) Outputs (L) RIGHT LEFT - + + INPUT INPUT BRIDGE MODE OFF OFF BALANCED INPUT BRIDGE MODE INPUT ON ON BRIDGE MODE Balanced input (R) Bridge mode switch Balanced input (L) Setting up the Stereo Power Amplifier - BALANCED INPUT Input (L) 9
Outputs Inputs The following table gives details of the output connections: The following two alternative audio inputs are provided: Use this output To connect to this Use this input LEFT, RIGHT Loudspeakers of 4Ω to 15Ω, using LEFT INPUT, A preamplifier, using phono connectors either plug or bare wire connections. RIGHT INPUT and high-quality screened cable.
To connect to a conventional preamplifier To connect to A500 Loudspeakers A500 Loudspeaker A500 Loudspeaker ● Connect the sockets marked INPUT on the back panel of the Stereo Power Amplifier to the outputs from your preamplifier. You should either use a twin-screened audio cable, or a pair of single-screened audio cables. These cables can have a 557 Stereo Power Amplifier considerable effect on the quality of the sound, and you are for your system.
To bi-wire to A500 Loudspeakers A500 Loudspeaker To wire to an A500 Loudspeaker in bridge mode A500 Loudspeaker A500 Loudspeaker 557 Stereo Power Amplifier Setting up the Stereo Power Amplifier 557 Stereo Power Amplifier 12 ON Input ● Set the BRIDGE MODE switch to the OFF position. ● If necessary, remove the links bridging the LF and HF terminals on the back of each loudspeaker.
● Fit the phono shorting plugs supplied with the Stereo Power Amplifier to the unused phono input or inputs. Extremely high sound quality can be achieved using two separate 557 Power Amplifiers, one to drive each loudspeaker. The two channels in each amplifier are used to drive the LF and You can bi-wire in bridge mode by using the other pair of red HF units in each loudspeaker. terminals to connect separately to the loudspeaker treble unit.
Troubleshooting This section describes problems you may encounter when using The sound has cut out the Stereo Power Amplifier, and includes suggested solutions. The 557 Stereo Power Amplifier includes a thermal shutdown, If these suggestions fail to cure the problem, please contact which mutes the output if the amplifier becomes too hot. your Meridian dealer for further assistance.
Maintenance Cleaning To clean the audio connections When cleaning the Stereo Power Amplifier bear in mind that the The audio sockets on the back of the Stereo Power Amplifier are front of the unit is metal, and the lid is glass. gold-plated and need no cleaning if gold-plated phono plugs are used. Otherwise, it is recommended that you unplug and Disconnect the power cord before cleaning the unit. reconnect the plugs at least once a year. A proprietary contact cleaner can be used to some advantage.
Service and guarantee Service Guarantee The Meridian 500 Series of hi-fi components have been carefully The 557 Stereo Power Amplifier is guaranteed against defects in designed to give years of untroubled service. There are no user- material and workmanship for two years from the date of serviceable parts inside the case, nor do the units require any purchase. form of maintenance.
Index A Accessories 6 B Balanced inputs L Lifting the 557 M Maintenance P 8 Positioning 8 phono shorting plugs 10, 13, 14 10 15 S Bi-amp connection 13 Meridian 500 Series 2 Bi-wire connection 10, 12 500 Compact Disc Transport 3 Sound has cut out 14 Bridge mode 10, 12 502 Analogue Controller Specification 3, 4 508 Compact Disc Player 3 C Cleaning 557 Stereo Power Amplifier the audio connections 15 562 Digital Control Unit the case 562V Multimedia Controller 15 Components 8 6
18 Index
