O.k. a couple of fairly basic questions.

1) On most dj mixers there are eq ratings and sometimes kill switches. A lot of eq nowadays will actually totally remove all sound if they are all set to total cut.
However, a lot of these mixers have different ratings on them. Some are only -24dB whereas some are marked -infinity.
Is it actually more to do with how the frequency bands are placed? For example, some mixers with higher cut ratings won't remove all of the audio if all 3 bands are down.
Presumably the eq bands need to be quite wide so that they overlap.
Also, is there a certain -dB which is assumed to remove all of the audio? So basically, is there a minimum attenuation that will remove all the audio on a 3 band-eq?

2) Input ratings
On one mixer (Ecler Nuo-05) there are two different line inputs; high-line and lo-line (0dBV and -10dbV).
These are there to accomadate differing sources.
Considering the gains cover a wide range are there actually any real implications for mismatch of sources?
Eg. I can run a 0dBV signal into the -10dBV and just use the gain control to keep the signal metered at 0dB and vice-versa.
I gather that in that case I could potentially overload the input. In the opposite way (running a -10dBV signal to a 0dBV input) are there any potential problems providing the gains are powerful enough to get the signal to 0dB? Does it add more noise? Because i'm not sure I can hear any audible difference in either situation.
Thanks

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http://www.skratchworx.com

Its too late and I can't be arsed to write an essay about mixers so in brief:

Q1 highlights what a bunch of twats mixer manufacturers are in there relentless quest for product promotion... even if it involves lying about their mixers. A big chunk of blame can also be placed on the rather ficcle target market for such products, who tend to buy for a variety of reasons devoid of practicality. The only solution is to make sure U hear the mixer before you buy it and just consider the calibrations given as a general guide to controller functions.. I didn't say this but you can always capitalise on the 20day return policy placed on all mail order goods in the uk (just don't forget to tell the right lie on return).

Q2;Running a mixer at max gain should do nothing cos thats within the range the manufacturer gave and it is designed to do. If you encounter problems with overheating or excessive noise its because they have wrongly calibrated it to give the impression it has a greater range than it does... which is pointless.... but alot of manufacturers are pointless.

Conc': Be very carefull when buying mixers designated for 'DJ' use. The industry has no respect for DJ's and frankly, neither do I.