Amplifier input query

[replicait]

Hi all,

Is it possible to send two separate audio signals (one from a guitar, the other fx from a MOTU output) into a basic guitar amplifier, using a Y-split cable or similar?

In an ideal world:

Guitar > DI > SPLIT [One signal to the audio desk for FOH speaker send, the other into the amplifier] & an output from the MOTU into that same amplifier.

It only needs to play back a few effects cues, not music, so I'm not too worried about the audio quality.

Any advice would be great.

Many thanks

 

[Osvaldo de Banfield]

Once two signals are mixed, it is very difficult if not impossible to split them again. And if want to send same signal to both outputs, a simple join in the amplifiers output will give a solution.

Rgrds.

 

[Mooly]

Try a simple resistive mixer. Feed the output of each source into say a 10K and join the other ends of the two resistors together.

It's not a good idea to parallel amp outputs directly (pre as well as power) because the outputs are at a low impedance and will "fight" each other, with each appearing as a short circuit to the other.

 

[cyclecamper]

Guitar amps often have two input jacks for one channel, for odd historical reasons (stereo guitars, stereo accordions, etc.). The typical Fender channel has a simple resistor network at the input. Truth is, most Fender type preamp channels sound much better without that input resistor network, with higher input impedance the guitar pickups seem to have less treble loss from their inductance or something.