Question about Soundcraft Efx12 - 12 Channel Sound Board Console Mixer

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Hi ihve soundcraft efx12 & the problem is in the effect, it hanges if i use the program selector, all the leds related to lexicon effects lit up.ithink the problem is in the the lexicon card. please help me getting rid of this problem.incase ihave to change the lexicon card how do i order it . thank you steven nathan

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  • radioPaloma Aug 20, 2012

    Hey there,i have the same problem. have you fixed your efx? how did you make it?

  • Richard Sartain May 29, 2013

    No Im gonna buy ann allen and heath

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Do you have a solution. I have the same problem.

Posted on Aug 25, 2012

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  • Soundcraft Master
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If the LED's are level indicators, you are probably saturating the input of the effect and may cause it to hang. Effects use delay and feedback and can cause numerical overflow and the system to basically crash. I would first call the Lexicon support and ask them about this problem... I did have to return one Lexicon product myself for service under warranty.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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Can I connect a Soundcraft Efx12 to a speaker without using an amplifier?


Yes, but it could be pointless.
Headphones are just small speakers so it is usually possible to drive a small pair of "computer/iPod" type speakers from the headphone output.
True balanced outputs should have a fair amount of drive so try connecting a speaker between pins 2 and 3. The higher the impedance of the speakers the better.
Ultimately, the results will be very quiet and the cost of a small amp or powered speakers for low level use is quite reasonable.

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What do you hook up first, mixer or power amp oreffects in a rack system?


Effects plug into mixer, mixer plugs into power amp. Others may want the mixer and the effects plugged into the power amp for the most available inputs. (when multiple inputs are available.)

Effects and mixer are a line level output and the mixer can be considered a line level input as well. A mic mixer has gain amplifiers for the inputs that are below line level such as unamplied microphones. It is possible to parse to absurdity, but the gist of it is above assuming you do not want to apply the same effects to everything all at once.

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The power amp is the final stage - the last output from the mixer goes to the power amps.
Its a routing problem - some mixers only allow certain routing and this could be affecting your FX routes.
All the FX - internal or outboard come before power.
Check the manual Check the aux send and returns Check if you need need stereo plugs for the send and return of FX.
Get back if still stuck.

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