impedance.. ohms.. help!

  • Thread starter Thread starter richardosim78
  • Start date Start date
i quit the system.. i dont have a job, friends, love, left my wife.. and all whats left is 15.. dont know about the future.. but i saved my honor.. i dont regret..
well if its all what ive got, gotta go for it... "super mixer".............................................

fuck the system!.. im not apart of it.. i will never come back... thats my nature.. i dont deserve this shit..
and i think people who made this system (including this website) r on a wrong side of the history.. they abuse those who dont deserve to be abused..
 
Saturn, Mars and the Moon will all be visible and appearing near each other tonight for the last time this summer.....
 
rob aylestone said:
So if you want not great results, unbalance your mics, replace professional connectors with jacks, and yell into them?
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my extra cables r xlr to stereo jack.. but i guess i could plug them into that mixer and get a mono sources out of my extra mics?..
as ashcat said - its better than doing nothing..

u know..

btw, xlr, trs cables can be unbalanced .. how is that??? how to know if my cables r balanced or unbalanced??
 
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Have you tried it? 57's need nearly 60db of gain to get to line level. I doubt that will do it. It's designed for something completely different.
 
"Impedance" tends to worry and confuse people but (for audio) it hardly ever matters, especially these days when with very cheap op amps it is just as easy to get it right as wrong!

OP is right in that inputs should be about ten times the impedance of the source but this really only matters in a pro studio situation where multiple "sinks" might be connected to a source and you do not want any level shift.

In the case of mic pre amps, 600Ohms used to be the normal load many years ago (and 30R in UK at least) but this throws away some 6dB of signal which must be made up by electronics and so you get a noise penalty for no good reason. Then there is a big following for much higher than 1k2 input Zs for mic amps as some say it improves the sound, especially ribbon mics. >10k Ohms is not uncommon here.

LEVEL is the property to worry about. In almost any "system" if level and gain staging are correct and sound quality good, impedance will be sorted.

Passive magnetic guitar pickups are said to need a 1,000,000 Ohm input Z. The magic "one meg". Not really vital, passive DI boxes and quite a few interfaces will have a Z of as low as 100k and nobody seems to notice! A lower input Z also make cable capacitance slightly less important.

As was said, electric acoustics tend to have built in amps but a purely passive piezo pup should "see" around ten meg or the sound can be bass light and thin.

About the only things that are at all fussy about impedance are power amps, especially valve amps. ALWAYS load them to The Book!

Dave.
 
If you physically connect xlr pin 1 to the jack sleeve, and also join it to pin 2, then you can connect pin 3 to the jack tip. If you use a three circuit jack which can be used for stereo headphones, then it could handle balanced audio, but very few devices use this connection type, and many would just use tip and sleeve, leaving the ring circuit unconnected, and no audio is the result. Have you actually bought the mixer? If so, then you just bought the wrong thing. Cheap real mixers are everywhere, and they are streets ahead in features and quality. You could use your little device to blend together two sound sources, no matter what they are as it's better than cutting plugs off and twisting the wires together, but that's about it.

We've all told you the problems with it, only you can listen to the result and decide if it's good enough for your own individual application. We think it something we would not consider doing. The rest is up to you.
 
rob aylestone said:
We've all told you the problems with it, only you can listen to the result and decide if it's good enough for your own individual application. We think it something we would not consider doing. The rest is up to you.
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u r right , guys...

and ecc83, thanks for the info..

farview, It's designed for something completely different???? what for?? give me examples then.. thks
 
Jesus....really guys?

It's a line mixer for line level sources. Keyboards, synthesisers, ipods....
A microphone puts out a much smaller signal and needs a preamplifier in front of it. A dynamic mic needs an especially strong preamplifier.

Waste of money.
 
richardosim78 said:
i quit the system.. i dont have a job, friends, love, left my wife.. and all whats left is 15.. dont know about the future.. but i saved my honor.. i dont regret..
well if its all what ive got, gotta go for it... "super mixer".............................................

fuck the system!.. im not apart of it.. i will never come back... thats my nature.. i dont deserve this shit..
and i think people who made this system (including this website) r on a wrong side of the history.. they abuse those who dont deserve to be abused..
Click to expand...

This is an awesome post! :drunk:

:)
 
Steenamaroo said:
Jesus....really guys?

It's a line mixer for line level sources. Keyboards, synthesisers, ipods....
A microphone puts out a much smaller signal and needs a preamplifier in front of it. A dynamic mic needs an especially strong preamplifier.

Waste of money.
Click to expand...

how can it deal with unbalanced strong line inputs if it has such low impedance values???? i dont get..
so how important is to have 7-10 higher impedance in inputs than outputs???
plz give me more examples.

ecc83 says its not so important.. so why everybody scream about inputs being much higher than sources?? to avoid signal loss, degradation..
i ve seen how guitar's high end gets lost and souds overall dull when input inpedance is lower..
the same with mics...
 
It's healthy to learn all this stuff, but I think you're focussing on the wrong thing.
You're worrying about what type of fuel to use, but the real problem is that you're planning a road trip in a JCB.

If you want to plug in microphones, buy something with mic preamps (look for XLR input and gain pots).
Impedance won't be a problem then because the gear is designed to do what you want it to do.

This might be useful info...maybe.
 
Steenamaroo said:
It's healthy to learn all this stuff, but I think you're focussing on the wrong thing.
You're worrying about what type of fuel to use, but the real problem is that you're planning a road trip in a JCB.

If you want to plug in microphones, buy something with mic preamps (look for XLR input and gain pots).
Impedance won't be a problem then because the gear is designed to do what you want it to do.

This might be useful info...maybe.
Click to expand...

yes, when u have a money for a mixer then it is JCB.. but when u got 15bucks u gotta think about the mopeds and fuel..
 
richardosim78 said:
yes, when u have a money for a mixer then it is JCB.. but when u got 15bucks u gotta think about the mopeds and fuel..
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But 15 bucks isn't going to make the mixer work. Cheaper to buy something that will as opposed to making something that is not able to do what you want.

How about I PayPal you another $15 so you have $30 to spend? :)
 
jimmys69 said:
But 15 bucks isn't going to make the mixer work. Cheaper to buy something that will as opposed to making something that is not able to do what you want.

How about I PayPal you another $15 so you have $30 to spend? :)
Click to expand...

golden words, man.....
but i decided not to take money from, or play music with someone who is not my real friend.. i mean real friend.. im out of the game, so i need real friends.. its not about money.. its about being on the right side..

so can anyone give me good real life examples of that mixer's usage?? more -better.. thnks
we r talking about super duper moped mixer soundlab micro mixer g105da
 
The real message here - don't "leave the grid" with only 15 bucks in your pocket. :facepalm:
 
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