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605

Name: Meridian 605
Brand: Meridian

Meridian

AmplifiersPower AmplifiersDiscontinued

Estimated price (community-sourced)

About the 605

The Meridian 605 is a monoblock power amplifier introduced in 1991, capable of delivering 150 watts into an 8 ohm load. It features a frequency response from 20Hz to 20kHz and an input sensitivity of 0.55V. The amplifier uses audio MOSFET output transistors (2SK and 2SJ types) and includes a standard power supply with a 400VA transformer and bridge rectifier, providing approximately ±60V after rectification. A secondary bridge supplies ±20V DC to power the operational amplifier (OP44) via adjustable regulators. The design incorporates a relay to disconnect the mains supply if DC is detected at the audio output stage, enhancing safety. The damping factor of the standard 605 is relatively low (around 7), but can be improved significantly with additional capacitance. The amplifier is known for its robust build with bronze casing and heat sinks, and it is considered vintage but still highly regarded for its sound quality.

Specifications

Key Specifications

Power: 150W

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