changing phase of speakers

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=1597
Printed Date: May 20, 2024 at 9:02 AM

Topic: changing phase of speakers

Posted By: Glynn
Subject: changing phase of speakers
Date Posted: June 29, 2002 at 5:12 PM

Hi,

I remember seeing somewhere here (and now I can't find it) , a diagram that allows you to change the phase of a speaker remotely.

Anyone got it or redirect me to it.

Its gotta be easier than jumping out, swapping wires in the boot, remembering how it sounded, changing it back, thinking it is better, swapping it back being not too sure. posted_image

Thanks, Glynn

Replies:

Posted By: Glynn
Date Posted: July 02, 2002 at 2:16 AM

can someone please direct me to the right diagram ?

The12 volt, you must have it somewhere ?

Thanks,

Glynn

Posted By: teknishn
Date Posted: July 03, 2002 at 6:31 AM

Get two relays. Label one "+" and the other "-". Tie pin 85 of both relays to +12V, and tie 86 of both relays to a wire you can access from where you need to listen to the system.

Now, tie the + out from the amp to pin 30 of the "+" relay. Tie the - out from the amp to pin 30 of the "-" relay. Then, tie pin 87a of the "+" relay AND pin 87 of the "-" relay to the + terminal of your speaker. Finally, tie pin 87 of the "+" relay AND pin 87a of the "-" relay to your speaker's - terminal.

When the relays are off, the speaker will be in phase with the amp output. When you tie the wire described in the first paragraph to ground, the relays will reverse the phase of the speaker.

Note that you would need to repeat this entire process for any additional speakers. Each speaker needs its own two-relay system.

the teknishn

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Teknishn