Question about Yamaha EMX312SC Powered Mixer 300 Watt Stereo 12 Channels 3 Band Equalizer Lightweight Design

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Why can't I get the same volume out of channels 5/7 & 7/8 as I do from 1,2,3,4?

IE: A guitar lead plugged into Line L (Mono) will come through both speakers but only at half the volume as the other channels......I have to turn the volume up to 3/4 to get the same sound as I do on the first four channels at only about 1/3

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Those stereo channel inputs are at line level rather than instrument level.

Posted on Aug 24, 2015

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Posted on Jan 02, 2017

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I only have a vintage Peavey XR600B and I want to connect and ipod and ipad up to it so I can play music. Can I do this or do I need special cables?


Sure you can, but that mixer amp is a mono amp instead of stereo. Head for radio shack and get an 1/8" stereo male phone jack to 1/4" female mono adaptor. Plug the adaper into the headphone output of your device. Then run a shielded cable with 1/4" mono phone plugs on both ends (like an electric guitar would use) from the device to one of the channels on the Peavey. Bring the volume up on both the channel and master on the amp up maybe 1/3 the way. Play a track on your device and adjust the devices out put as high as it will go with out distorting the channel input. Then adjust the amp's channel and main output as you would normally to get the final volume you need.

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It sounds as if the input is too low. what happens if you plug whatever is going into the stereo channels into a pair of mono channels. Or are you taking about the phono stereo tape input?
The stereo channels are line level whereas the other channels have both line and mic level inputs, what are you trying to put through the stereo channels? You must make sure the gain switch is set to the -10dB to get the most sensitivity (the mono channels have about -132dB max sensitivity BTW) You probably need a different mixer or possibly a submixer if you are needing more than 4 low level inputs.

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Bad soldering, especially around the jacks and plugs. Crack in the circuit board. Bad switch contacts on the headphone jack... all these are first things to check.
Here is your service manual for the unit:

http://elektrotanya.com/line6_spider_15w_ii3012_1508_sm.pdf/download.html

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1 Answer

On clean channel when 'channel volume' is adjusted, the sound cuts out, goes completely dead. I have to switch to another channel and back again or switch off and back on. The amp seems to get confused!


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5. press foot switch on pedal and adjust pedal controls to suit your type of distortion.
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ps Just as an after thought rechargeable 9volt batteries are the way to go. I've been using them for years as I always get caught up in the power cable.
If you're going to add another pedal like a Phaser, Compressor, Flanger or what just use small connect leads between each pedal but always, always put the compressor pedal last in the line.

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