Meridian HD621 HDMI Audio Processor

Why Buy New is pleased to offer for sale, this brilliant Meridian HD621 HDMI Audio Processor.

It has been professionally repackaged to ensure safe delivery and comes with a power cable, Meridian Comms lead, and user manual.

This has been tested and is in full working order. It is sold with a 3 month warranty.

The cosmetic condition is good. There are some minor marks/scratches. Please see the condition in the images.

FREE national courier delivery.

Why Buy... from us?
Because all of our items go through a full inspection, get serviced (if required), PAT tested for electrical safety, deep cleaned and all come with a warranty. We are 100% committed to customer care and are always on hand pre or post-delivery for technical help and advice.

Meridian HD621 HDMI Audio Processor
Product Description and Specifications

Overview
The Meridian HD621 is a high-performance HDMI audio processor designed to integrate modern HDMI-equipped sources—such as Blu-ray players, game consoles, and streaming devices—into Meridian digital audio systems. It separates high-quality multi-channel PCM audio from HDMI signals and delivers it directly to Meridian processors, while simultaneously routing video to the display.

This unit offers advanced audio processing features such as FIFO buffering, sample-rate conversion, Meridian’s proprietary apodising filters, and lip-sync delay adjustment. It supports both 2D and 3D HDMI video formats and is optimised for use with Meridian products via MMHR (RJ45) and SmartLink (coaxial) outputs.

Key Features

• HDMI audio extraction with advanced jitter reduction using FIFO buffering.
  
• 6 HDMI inputs and 1 HDMI output for flexible source switching.
  
• Outputs up to 8 channels of PCM audio via Meridian MMHR or SmartLink connections.
  
• Sample-rate conversion with selectable output rates (44.1/48 kHz or 88.2/96 kHz).
  
• Meridian apodising filters to enhance audio resolution.
  
• Adjustable lip-sync delay (up to approximately 85 milliseconds).
  
• Front panel control, RS-232, and Meridian Comms (BNC/DIN) for system integration.
  
• Ideal for use with Meridian 861, G68, C61R, and similar processors.

Meridian HD621 – Technical Specifications

General

• Form Factor: 1U 19-inch rackmount or standalone
  
• Dimensions (W x H x D): Approx. 440 x 44 x 300 mm
  
• Weight: Approx. 4.5 kg
  
• Power Supply: Internal universal power supply (100–250 V AC, 50/60 Hz)
  
  

Inputs and Outputs

• HDMI Inputs: 6 x HDMI
  
• HDMI Output: 1 x HDMI (video only; optional audio passthrough)
  
• Audio Outputs:
  8-channel MMHR balanced (RJ45)
  8-channel SmartLink coaxial (4 x RCA connectors)
  
  

Audio Processing

• Supported Input Sample Rates: Up to 192 kHz
  
• Output Sample Rates:
  Standard: 44.1 kHz or 48 kHz
  High-resolution: 88.2 kHz or 96 kHz
  
• Processing Features:
  FIFO buffering for jitter reduction
  Up/down-sampling
  Meridian apodising filters
  
• Lip-Sync Delay: Adjustable up to approx. 85 milliseconds
  
  

Control and Integration

• Control Interfaces:
  Front panel buttons
  RS-232 serial control
  Meridian Comms (BNC and DIN)
  
• Status Indicators:
  Power LED
  6 input selection LEDs