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Meridian Audio G68 & HD621 AV Processor Pre-Owned Meridian G68 Digital Surround Controller and HD621 HDMI Audio Processor Bundle. Technical Specifications Meridian G68 Digital Surround Controller Dimensions: 440 mm (W) x 150 mm (H) x 350 mm (D) Weight: Approximately 10 kg Materials: High-grade aluminium chassis with a sleek black finish Inputs: 5 digital coaxial, 3 optical, 6 analogue stereo pairs, 5 S-video/composite Outputs: 8 analogue outputs (for 7.1 surround), 1 digital coaxial, 1 optical Supported Formats: Dolby Digital, DTS, THX, PCM up to 24-bit/192 kHz Meridian HD621 HDMI Audio
At A$1,000, this Meridian HD621 listing is ambitious compared to the typical used market, where units routinely sell between A$350 and A$750. Recent sales show a tested, working example listed for roughly A$580 (US$259 plus shipping), and a StereoNET classified in Australia advertised one in “Very Good” condition for just A$150. Even accounting for regional variation, the asking price sits well above the 75th percentile, making it a hard sell unless the seller includes rare accessories or original packaging.
The HD621 remains a respected HDMI audio processor for Meridian surround systems, cleanly extracting up to eight channels of high-resolution audio while switching six HDMI sources and providing lip-sync control. Its value lies in seamless integration with Meridian processors and keeping video noise away from audio circuits. However, at this price, buyers should verify HDMI-handling age (it’s 2009 tech), confirm all six inputs work, and check for missing Smartlink or MMHR cables—issues that become material when the price exceeds fair market value.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Meridian Audio traces its roots to 1977, when British innovators Allen Boothroyd, an industrial designer, and Bob Stuart, an engineer, founded the company in Cambridgeshire, England. From the outset, Meridian—initially known as Meridian Sound System Company—targeted high-end audio, launching with the M1 active loudspeakers, among the first designed specifically for domestic listening rather than professional use. This heritage of British engineering excellence has defined the brand, with all products researched, designed, and engineered in Great Britain, earning over 350 industry awards and placements in prestigious collections like the Victoria and Albert Museum and MoMA.
The company's product focus centers on cutting-edge digital audio solutions, particularly DSP (digital signal processing) loudspeakers with integrated amplification, including groundbreaking active designs like the world-first D600 digital loudspeaker in 1989 and high-resolution active systems from the 1990s. Meridian excels in premium home audio and video entertainment systems, encompassing amplifiers, digital speakers, and in-wall options for custom installations. Its expertise extends to bespoke automotive sound systems, partnering with luxury marques like Land Rover, Jaguar, and McLaren to deliver immersive 3D surround audio tailored to vehicle acoustics.
Positioned firmly in the high-end market, Meridian commands respect among discerning audiophiles and custom integrators worldwide, sold in over 80 countries through specialists. Renowned for pioneering digital audio advancements and superior fidelity, it sets benchmarks in both residential and in-car luxury audio, blending innovation with craftsmanship for those seeking uncompromised performance.
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