Meridian 551 Integrated Amplifier
Features:
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
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.
Specification
Total Harmonic Distortion : less than 0.05%
Signal-to-Noise Ratio
High-Level Analogue Inputs : less than –90 dB
Phono MM Input : less than –70 dB
Phono MC Input : less than –60 dB
MM Option :
Sensitivity : adjustable 0.5 – 3 mV for 5 cm/s at 1 kHz.
Overload Point : 47 mV at 1 kHz.
Cartridge Load : 47 k Ω ( 100 pF)
MC Option:
Sensitivity : adjustable 38 – 210 μV for 5 cm/s at 1 kHz.
Cartridge Load : 220 Ω (10 nF)
Inputs (5 phono inputs)
Sensitivity : adjustable 27– 150 mV
Impedance : 20 k Ω
Power Outputs (2 outputs)
55 W per channel into 8 Ω
80 W per channel into 4 Ω
Volume Control: 99 steps of 1 dB
Output Level:
Tape : 1,5 V
Headphone : 2 V 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 (W x H x D) : 321 x 88 x 332 mm (12.64" x 3.46" x 13.07")
Weight: 10 kg (20 lbs)
Controls: Front-panel controls for Source, Copy, Spkrs, Mute, Display, Volume up/down, Off.
Front Display: 4-character dot matrix LED display.
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