My Peavey 2000 is great for my daughter's vocal perfromances, but I'd like to understand the differences in the power of her accompaniment music from different input sources. For example, her CD (a portable, walkman-type device) and her top-of-the-line iPod don't produce enough volume through the Paevey 2000 as accompaniment music for her vocals, while her small "boom box" Sony does. Is the difference just attributable to the low power output of the iPod and the portable CD player while the boom box has higher power output? Is there a way to boost the signal from either? The iPod, by the way, plays through my B&O home stereo system just fine but, using the same cables, just doesn't do the job with this nice Peavey 2000.
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Re: Low volume from CD and iPod input
In audio system you have three different levels. 1-mic level which is very small output level. 2-line level(like cd player output)which is higher than above. 3-speaker level is highest one which drive speaker and get sound out from it. if you want to get control for number 1 and 2 you can use very simple sound mixer.(from radio shack-or other electronic store) connect your sound source(mic-cdplayer)to the mixer and get out from mixer to amplifier.
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Well, I would say it isn't dropping the level of "the whole pa", it is just dropping the level of the input you have plugged the fx into. Check the settings on your fx unit, there are usually input, output and mix controls that are independant of "the pa" and affect the amplitude of the signal going into your mixer from the fx unit.
sounds like distortion is being caused by trying to amplify a low volume level from the input device. try putting the ipod volume at a medium level and try again to see if the distortion goes away/reduced
Where is the gain set for that input channel of the low impedance mics? If you have an unbalanced Hi-Z input sharing a channel with a low Z balanced microphone They are sharing the same gain stage op amp- in which case an unamplified microphone loses.
There is not enough info here to provide a complete answer, but let me give you some background:
There will always be some hiss. This is due to general amplification where a small amount of noise is amplified along with the general signal. In most cases, the signal is strong enough to overpower any noise that is present (vocals in your example). This noise should not be that noticable in normal cases. If there is an automatic gain control in the line, this could account for it as with "silent" times, the gain will automatically be increased potentially to the degree where the noise is noticable.
Barring that scenerio, if the input signal is too low, the overall gain necessary to produce reasonable volume at the speakers will also be such that the noise is noticable. In order to track this down, please provide details about the current setup including:
1) Microphone make and model being used
2) Input being used on the mixer
3) Gain level being used for the mic channel
4) Gain level being used at the master level.
Mic to Mixer, and Mixer to Laptop? Or is your mic connected directly to your laptop?
To do this properly, you will need a secondary audio input device of some kind that accepts line level input. Microphone inputs are intended for low level signals, and are not going to accept the input form a mixer properly. (you can get it to work, but it will generally be distorted)
There are various USB or PCMCIA audio input card options that aren't too expensive. Once you have that, you would need to route your music and microphone through your mixer, and the output of the mixer to your audio input device.