Yes. With the mode switch on the LS-2 set to "A+B MIX <--> BYPASS," the two signals fed to the RETURN jack A and the RETURN jack B are mixed and output from the OUTPUT jack.
You can adjust the volume for each signal fed into the RETURN jacks A and B with the level knobs A and B, respectively.
NOTE:
- When using this connection method, insert a dummy plug into the INPUT jack to turn on the power of the LS-2.
- You can connect a guitar directly to RETURN jacks A and B.
- This connection method is not very good for mixing signals with a low level, such as microphones. Use it for guitar or line outputs.