file Odd way of wiring three speakers to an amp

10 years 2 weeks ago #6741 by tendril
I have a very dusty memory of a diagram to wire up 3 speakers to an amp for home use that gave an interesting effect. From what I remember it was big in the 70s. I can't rememeber the diagram. I thought it may be like this:



But I think I have the third one wrong.

Anyone remember this and also what the config is called?

Many thanks

tendril

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6742 by chaudio
Replied by chaudio on topic Odd way of wiring three speakers to an amp
If you connect the third speaker as you would in bridge mode, across the left and right positive channels, the speaker will receive the difference between left and right. The earliest surround sound encoding worked roughly on that principle so if you put the third speaker behind you while listening to suitably encoded tracks you'll get a basic surround sound effect. Works well on Star Trek - TNG actually, you get the sound of the ship (low rumble/hum type sound) coming from the rear speaker.

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6743 by tendril
Replied by tendril on topic Odd way of wiring three speakers to an amp

chaudio wrote: If you connect the third speaker as you would in bridge mode, across the left and right positive channels, the speaker will receive the difference between left and right. The earliest surround sound encoding worked roughly on that principle so if you put the third speaker behind you while listening to suitably encoded tracks you'll get a basic surround sound effect. Works well on Star Trek - TNG actually, you get the sound of the ship (low rumble/hum type sound) coming from the rear speaker.


so, like this then:

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6744 by chaudio
Replied by chaudio on topic Odd way of wiring three speakers to an amp
Yeah. Only do it on amps which don't mind low impedance loads. ie. don't do it on a hi-fi amp that says 8 Ohms only. Although at low volumes, most things will cope with it.

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6747 by tendril
Replied by tendril on topic Odd way of wiring three speakers to an amp
Thank you very much :)

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6754 by nickyburnell
Replied by nickyburnell on topic Odd way of wiring three speakers to an amp
Seen this in car audio, often wondered. Nice thread. Ta

Please Log in or Create an account to join the conversation.

10 years 2 weeks ago #6759 by tony.a.s.s.
Replied by tony.a.s.s. on topic Odd way of wiring three speakers to an amp
I'd forgotten all about this one. It was refered to as the 3rd channel, and definately talked about in the old Hi Fi mags.

Peace and goodwill to all speaker builders

Please Log in or Create an account to join the conversation.

10 years 1 week ago #6810 by jazomir
Replied by jazomir on topic Odd way of wiring three speakers to an amp
Any suggestions about whether the centre / rear speaker should be voiced the same as the mains - is the effect full range or bass only? If full range, I have some nice Ariston cylindrical speakers which just might do the biz on my Quad 405 but I shall try at low levels first to see how things work. I also forgot about this - first read about it in a magazine called Studio Sound I used to get in the seventies and early eighties!

Regards,
Jazomir

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum