Simple Mono to 2 Speakers

[StevenStanleyBayes]

I have been asked a lot of questions on mono to 2 speaker a. k. a. mono to stereo and I have decided to make this publication, therefore.

 

[DUG]

Any one but the one with only a switch will work. Do not connect two outputs directly together.

The one with resistors and a switch will not introduce distortion and you do not really need the 20K.

 

[StevenStanleyBayes]

I have forgotten the topic, but, I have just looked into the switch : No, I do Not connect the outputs, I connect the inputs. Position 1 is stereo, position 2 connects the two input to output 1. Position 3 connects the two inputs to output 2. ( I forgot to put a dot on channel 2. )

As far as the resistors are concerned, I do not like to rely on the input, although you may be right. Yet, the loss of signal with the 20K is negligible and the input is supposed to be of much higher than 20K impedance.

 

[DUG]

Just noticed: Resistors are 5%?

This could unbalance the R-L mix by 10%.

Use 1% at worst, 0.1% if you got em.

 

[StevenStanleyBayes]

Of course, 1% resistors are better. 0.1% are even better.

 

[StevenStanleyBayes]

A document, called Errata.doc has been published here : Errata - Google Drive

The document correct errors I may have made in various projects I have worked on.

The document is to be updated.

Please, report all errors and problems.