Audio Engineering Society Standards Committee

Comments on AES45 loudspeaker connectors

[Last printing 3 June 2001] Comments to date on Draft AES45-xxxx DRAFT AES standard for single programme connectors - Connectors for loudspeaker-level patch panels published 2001-01-08 for comment.

Meachin 2001-03-30

From:   SMTP%"" 30-MAR-2001 04:49:39.05
Subj: Comment on DRAFT AES45-xxxx

In projects in which I have been involved it has been our practice to use the following connection system for non-bi-amplified loudspeaker patch panels: -

All sockets are 4-pole type. Amplifier outputs are connected to pins 1+ and 1- on panel sockets. Inputs to loudspeakers are connected to pins 2+ and 2- on panel sockets. Patch cords are 'cross-wired' with 4-core cable, having pins 1+ and 1- connected to 2+ and 2- on the other end.

This method has the advantage of allowing simplified operation by the user, since patch cords may be used with signal flow in either direction. The method retains the advantage of preventing the outputs of two amplifiers being connected together. Patch panel assembly is also simplified, since only one connected type is used.

Alistair Meachin

Dear Mr. Meachin,

Thank you very much for your comment on AES45-xxxx which concerns connectors for loudspeaker patch panels. We gather from your comment that you do not object to the wiring specification in the draft, but are suggesting an alternative.

The SC-05-05 Working Group on Single-Programme Connections did give consideration to the scheme you have suggested, its consensus was to limit the standard to the single wiring configuration favored by most of the group. We feel therefore, that the standard should not be reconsidered at this time. Nevertheless, we have placed your recommendation on the agenda for review of AES45 for possible revision or amendment.

As you know, membership in AES Standards Committee working groups is open to the public and all project descriptions and reports on progress are posted, as they are produced, on the Web site,, and in the AES Journal.

We encourage you to join the working group to more effectively put forward your ideas. Much of the work of the group is done on the e-mail reflectors, so meeting attendance is not necessary for effective participation. Instructions for joining are on the Web site

Please reply quickly if this reply is not acceptable to you. As we said, we are considering your comments for the next revision of the document. However, you may appeal our decision to the Standards Secretariat.

Best regards,

Dan Queen
Standards Manager

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