I have returned, and i come bearing a question

[inteificio]

Hi,

I am back after a long while (painful illness)

I have a question.

I have a three channel amp, and a two channel preamp
I was wondering if there was a simple way of blending the right and left channel to create a signal for the centre.

I origionally had a surround proccesor for this but had to sell.

Is there an easy way of doing this?

Is there a name for it so i can check the forums?

Thankyou

 

[SY]

Welcome back!

If you literally want the sum of left and right, the circuit you want is called, logically enough, a summer. It's a couple resistors and an opamp.

 

[inteificio]

Wow that was a fast responce!

searched the forum and found nothing relevant (could be crap at searching =-) )

how do you make one?

I have minimal electronics knowledge, but am willing to learn and have a high resistance to being electrocuted.


Thx

 

[lgreen]

summer

here is one I came up with on google.

voltage summer

 

[inteificio]

Thanks that looks like it could help.

Does anyone know how to build it? I don't know how to read those charts, and do not know what exact components iwould require

total begginer here =-)

 

[marsupialx]

You could also look for an inexpensive mixer (DJ).

An inexpensive mixer, or one with a problem that doesn't affect all the channels, since they usually have 8, would work.

 

[pinkmouse]

Hi Pete

Built that balanced output yet?

For this problem, you could try searching for "virtual earth mixer"

Good to have you back.

 

[inteificio]

Hi pinky,

Well rembered!

The parts are sitting in a bagwaiting for me to save up and buy a processor.

I reasoned that that would be a while....unless anyone here needs large quantities of Everest products =-)

So i decided that, in fact i don't need most of the proccesor, I just need to know how i can create a centre one.

Once this is complete then i will start thinking about that XLR thingy.

Nice to hear from you again btw.

Peter

 

[cpemma]

If you literally want the sum of left and right, the circuit you want is called, logically enough, a summer. It's a couple resistors and an opamp.

I've seen a number of designs of this type for stereo-mono converters; one question - does popping the pair of resistors (say 20k-100k in total) across the L & R channels affect the sound you're passing on to the stereo amplification? Like no reduction in channel separation?