stereo line level mixer 4 inputs 2 outputs...?????

[deadastronaut]

hi guys im looking to build a simple line level mixer, i made a passive one, but now i want
to build a simple powered one!.

i need 4 phono socket line level inputs, going to 2 outs. so i have 2 lots of stereo in, to l/r stereo out.

nothing fancy, just volume control on all four pots...but with a bit of a boost, but clean,

anyone got any suggestions?.schematics even better!...
i have a tlo74 laying around?....quad op amp?....
...any ideas appreciated.

thanks in advance rob.

[deadastronaut]

bumpy bumpy..

[slacker]

The simple mixer from GGG should do the job http://www.generalguitargadgets.com/projects/15-boostersrouters/68-mini-mixer-project. Just make 2 of these one for left, one for right,  be nice and easy with a quad opamp

I doesn't have any boost, if you want to add some make R10 smaller or R13 bigger.

[deadastronaut]

ahhh nice one...cheers ian , i'll have a go at designing a vero for the quad amp stereo version of this. nice!.

cheers rob.

edit:

arghhh..i found 2 tlo72's but not my quad..so if i build 2 of these , should be ok yeah!..

anyone see any probs?before i go ahead!...its ggg's mini mixer schematic ok...only 2 channels though, i will build another 2 make stereo..

[deadastronaut]

bumpy bumpy....

[slacker]

Looks good to me

[deadastronaut]

cool, i'll crack on with it then....

[deadastronaut]

just to let you all know....

vero above verified....works well... just another to build...

thanks ian.

rob.