Errius wrote on 2024-01-24, 17:41:

Are passive mixers safe? I was always told you shouldn't directly connect the outputs of two different audio devices.

I've been using this little passive Rolls for years without issue: https://rolls.com/product/MX41b

You lose some gain of course, but not enough to be a problem.

Errius wrote on 2024-01-24, 17:41:

Are passive mixers safe? I was always told you shouldn't directly connect the outputs of two different audio devices.

Those passive mixers will probably be safe because they don’t just connect the outputs together. There is enough resistance between the input and the point where they are all joined that they are not able to short each other out. That’s why the output signal is lower and needs more amplification.

Yes there are two resistors on each port one for right and one for left. Then the trim pot for varying the volume of the signal. (Probably on the common)

Sphere478 wrote on 2024-01-21, 15:16:

Nice! :p

I wonder if there is a version with more ports🤔

Lots of options on Aliexpress, active and passive.

https://www.aliexpress.com/item/1005006374031 … 7Cquery_from%3A

Tempus wrote on 2024-01-12, 09:25:

I use this 1988 mixer with a 486 and a Pentium 3.

Are the inputs stereo? Most pro mixers I've come across have maybe 2 stereo inputs, the rest are all mono. Most DJ mixers seem to be stereo, but only 2-4 channels, so not much good for multiple soundcard/rompler setups.

orcish75 wrote on 2024-01-26, 07:35:

Tempus wrote on 2024-01-12, 09:25:

I use this 1988 mixer with a 486 and a Pentium 3.

Are the inputs stereo? Most pro mixers I've come across have maybe 2 stereo inputs, the rest are all mono. Most DJ mixers seem to be stereo, but only 2-4 channels, so not much good for multiple soundcard/rompler setups.

They are mono inputs, with panning set to left and right, so 16 channels becomes 8 stereo channels. The ouputs are stereo. One set of balanced (XRL) and one set of line ouputs (6.2mm jacks). I have to use an attenuator for channel 1 and 2 since they are microphone level. (Seen on top of the mixer).

I got this a while back but couldn't find the thread.

Radio Shack Audio/Video Selector Cat No. : 15-1951

So I'm figuring on repurposing it as a 4 outputs into 2 inputs audio selector, relabeling "TV Viewing" to Desktop speakers, and "VCR Recording" to 5:1 surround amplifier system probably. Then you can put PC or soundcard one through four, to either.

If one gets really devious, I think you can use some of the video connectors as well to get another channel.

This wasn't the one I was talking about previously, that one is more like Hi-Fi rack sized, whereas this one seems to be just the right size to perch on a "fat" ATX tower and look like it belongs there. It has some amplification, dunno if it's just a few decibels for killing the insertion losses or what, I don't expect 100mA from 12V is gonna do all that much.