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HD621 HDMI Audio Processor

 User Guide

2

Important safety instructions

Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any ventilation openings. Install in accordance with the 
manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, 
stoves, or other apparatus (including amplifiers) that produce heat.
Do not defeat the safety purpose of the polarized or grounding-type 
plug. A polarized plug has two blades with one wider than the other. A 
grounding type plug has two blades and a third grounding prong. The 
wide blade or the third prong are provided for your safety. If the provided 
plug does not fit into your outlet, consult an electrician for replacement of 
the obsolete outlet.
Protect the power cord from being walked on or pinched particularly at 
plugs, convenience receptacles, and the point where they exit from the 
apparatus.
Only use attachments/accessories specified by the manufacturer.
Unplug this apparatus during lightning storms or when unused for long 
periods of time.
Refer all servicing to qualified service personnel. Servicing is required 
when the apparatus has been damaged in any way, such as power-supply 
cord or plug is damaged, liquid has been spilled or objects have fallen 
into the apparatus, the apparatus has been exposed to rain or moisture, 
does not operate normally, or has been dropped.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO 
NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

This apparatus has been designed with Class 1 construction and must be 
connected to a mains socket outlet with a protective earthing connection 
(the third grounding pin).

This apparatus uses a single-pole power switch. As a result it is not isolated 
from AC mains power when switched off at the rear panel. The apparatus 
may be isolated from mains power either by unplugging the power 
connector from the rear of the unit, or by unplugging the connector at the 
opposing end of the power cord or cable from its supply outlet. As a result, 
either or both of these connectors should remain accessible

Safety warnings

Do not expose the unit to dripping or splashing.
Do not place any object filled with liquid, such as a vase, on the unit.
Do not place naked flame sources, such as lighted candles, on the unit.
To avoid overheating leave at least 10cm around the equipment to ensure 
sufficient ventilation.











Do not position the unit in direct sunlight, near heat sources such as a 
radiator, or directly on top of heat producing equipment, such as a power 
amplifier.
To avoid interference do not position the unit near strong electrical or 
magnetic radiation, such as near a power amplifier.

Radio interference

FCC Warning

: This equipment generates and can radiate radio frequency 

energy and if not installed and used correctly in accordance with our 
instructions may cause interference to radio communications or radio and 
television reception. It has been type-tested and complies with the limits 
set out in Subpart J, Part 15 of FCC rules for a Class B computing device. 
These limits are intended to provide reasonable protection against such 
interference in home installations.

EEC

: This product has been designed and type-tested to comply 

with the limits set out in EN55013 and EN55020.

Dolby, Dolby Digital, and the double-D symbol are trademarks of Dolby 
Laboratories Licensing Corporation. DTS is a registered trademark of 
Digital Theatre Systems Inc. HDMI, the HDMI logo, and High-Definition 
Multimedia Interface are trademarks or registered trademarks of HDMI 
Licensing LLC. Boothroyd|Stuart Meridian, Meridian, and Meridian Digital 
Theatre are registered trademarks of Meridian Audio Ltd.

MHR: This product incorporates patented copyright protection technology 
and intellectual property of Meridian Audio Ltd. This technology is provided 
for the express purpose of securely containing copyright audio within 
the Meridian System only. Reverse engineering or circumvention of this 
protection is strictly prohibited.

The HD621 incorporates High-Definition Multimedia 
Interface (HDMI™) technology. HDMI, the HDMI Logo 
and High-Definition Multimedia Interface are trademarks or registered 
trademarks of HDMI Licensing LLC.

Copyright

Meridian Audio Ltd, Latham Road, Huntingdon, Cambridgeshire, 
PE29 6YE, England

Copyright © 2011 Meridian Audio Ltd.

Visit us on the Web: 
http://www.meridian-audio.com

Part no: HD621/2 (P88400)

This guide was produced by: Human-Computer Interface Ltd,  
http://www.interface.co.uk/

Summary of Contents for HD621

Page 1: ...HD621 HDMI Audio Processor User Guide...

Page 2: ...ety warnings Do not expose the unit to dripping or splashing Do not place any object filled with liquid such as a vase on the unit Do not place naked flame sources such as lighted candles on the unit...

Page 3: ...rol connections Use this connection To connect to this RS232 DB 9M Sub connector A PC to enable the HD621 to be controlled remotely via serial commands configured using the Meridian Configuration Prog...

Page 4: ...ith resolution enhancement of up to 24 bit When set to standard rates the output is either 44 1kHz or 48kHz irrespective of the input rate high sample rates being downsampled by a factor of two or fou...

Page 5: ...al input on your Meridian Surround Controller or DSP Loudspeakers Be sure to observe the channel allocation correctly Each socket carries two channels and you should connect the appropriate number of...

Page 6: ...s switched off or disconnected This allows music to play or continue to play without a display It may take a few seconds while the units handshake to establish this mode It may also take a few seconds...

Page 7: ...u will only use it as such in a non Meridian system If you select the HD621 as the controller in a Meridian system the available inputs on a Meridian processor you add subsequently will be limited to...

Page 8: ...ital 5 1 Ch AAC DTS 5 1 Ch Inform the source about the decoding capability of the products fed by the HD621 Set all three to Yes for Meridian Surround Controllers such as the G61R and G68 Set AAC to N...

Page 9: ...ypes stored in the product You can reset the HD621 to a Type by selecting the desired Type from the list and right clicking on it then choosing Reset to this Type from the resulting pop up menu The fi...

Page 10: ...e expected result eg no audio is heard even after several seconds have elapsed it may help to switch to another input and then back again This is not a fault in the HD621 it is a function of how the s...

Page 11: ...HD621 HDMI Audio Processor User Guide 11...

Page 12: ...HD621 HDMI Audio Processor User Guide 12...

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