Meridian 557 Power Amplifier

Meridian have maintained a strong reputation for their power amplifier technology for over 15 years. Until now, their power amp developments have concentrated on high-transparency low-power models or on the custom amplifiers in their renowned active and digital speaker designs.
The 557 takes the Meridian 500 Series into new territory - with 200W of clean clear power - for the first time allowing the option of a complete Meridian front end for large passive speakers. The Meridian 557 can be used with the 502 or 501 preamps, or with a Meridian DSP Surround Processor. The Meridian 557 houses two powerful amplifiers in a dual mono construction. The amplifiers are both rated at 200W into 8 ohms. Each over-specified output stage uses 8 high-power transistors. These, combined with a massive low noise 1.6kVA toroidal transformer, permit this amplifier to deliver currents in excess of 30A, ensuring no loss of performance even into loads that dip below 2 ohms. The massive power delivery of this amplifier makes it ideal for driving difficult loudspeaker loads.
557 can be operated in bridged mode giving power in excess of 680W into 8 ohms, 1000W into 4 ohms.
The 557 provides balanced and unbalanced inputs as well as twin outputs for bi-wiring.
The topology of 557 is very much in the Meridian tradition. A high-precision fast DC-precise input stage is combined with a fully complementary amplification and output stage. Also, the 557 uses Meridian’s well established self-adjusting bias and error-correction output topology.
The 557 is fully protected against DC and thermal overload. A proprietary Meridian soft-start circuit is also fitted.

Power output: 200 W into 8 ohms; 680 W into 8 ohms Bridged; 1000 W into 4 ohms Bridged
Distortion: < 0.05 %
Signal/Noise: - 90 dB
Inputs:
- Balanced on XLR - Sensitivity 3.00 V rms
- Unbalanced on phono - Sensitivity 1.44 V rms
Outputs: Twin outputs for bi-wiring
Dimensions: 385 (W) x 306 (D) x 174 (H) mm
Weight: 27 kg

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

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