Meridian Audio 551 Brochure
Meridian 551
The Meridian 551 Integrated Amplifier uses a dual-mono construction similar to
the 556 and 557 Stereo Power Amplifiers but includes a high-quality
preamplifier similar to the 501.
The preamplifier provides six audio inputs, each of which can be individually
adjusted for sensitivity, and identified on the four-character alphanumeric
display. A very high quality MC or MM phono stage is available as an option for
the dedicated LP input.
The 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.
A separate headphone amplifier and a speaker on/off facility allow you to enjoy
music without disturbing others.
Technical Specification
Distortion: Less than 0.05%
Signal/Noise: Less than –90dB for high-level analogue inputs. Less than
–70dB for MM input. Less than –60dB for MC input.
MM option: Sensitivity adjustable 0.5 – 3mV for 5cm/s @ 1kHz. Overload
point 47mV @ 1kHz . Cartridge load 47k Ohms 100pF.
MC option: Sensitivity adjustable 38 – 210µV for 5cm/s @ 1kHz . Cartridge
load 220 Ohms 10nF .
Inputs: 5 phono inputs, sensitivity adjustable 27 – 150mV. Input
impedance 20k.
Outputs: 2 outputs 55W per channel into 8 Ohms, 80W per channel into
4 ohms. Volume control 99 steps of 1dB
Tape output: 1.5V
Headphone: 2V maximum output.
Comms: Two 5-pin 240° DIN sockets, RS232 interface.
Construction: Black textured enamel and glass finish. Side heatsinks from
black painted aluminium.
Dimensions: 88mm (3.46in) H, 321mm (12.64) W, 332mm (13.07) D.
Weight 10kg (20lbs)
Controls: Front-panel controls for Source, Copy, Spkrs, Mute, Display,
Volume up/down, Off.
Front Display: 4-character dot matrix LED display.
551
Integrated Amplifier
Sales information
12th February 2002
• Dual-mono construction
• Six adjustable-sensitivity audio
inputs
• Separate headphone amplifier
allows you to enjoy music
without disturbing others
• High quality MM or MC phono
stages available
• Preamp audio output using
low distortion volume control
• RS232 for external control
Meridian Audio Limited
Stonehill, Stukeley Meadows
Huntingdon
Cambridgeshire PE29 6EX
T +44 (0) 1480 445678
F +44 (0) 1480 445686
Meridian America Inc.
Suite 122, Building 2400
3800 Camp Creek Parkway
Atlanta GA 30331
T (404) 344 7111
F (404) 346 7111
www.meridian-audio.com
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