It's probably the mic itself or interference from some other device. How high to you have the treble set? I always turn the highs down on my mics.
American Audio 19MXR
- Thread starter jtnichol
- Start date
As Wes said, it could be the mic, so try another brand/type. It could also be the mixer pre-amp .. as Houston was alluding to, the pres in many DJ level mixers aren't up to the level of many basic live sound type mixers .. not sure why, but it is what it is.
Unless I missed something he has stated several times that it does it with no mic connected and anytime he activates the input to the mic channel on the mixer board. To me that is internal to the mixer on whatever bus the switch activates.
I do not trust DJ Mixers to do serious Mic Duty. It is also a problem to get an External Monitor on just the Mics. preamp stage in Live sound Mixers tend to be superior than those in DJ Mixers.
I can hear the hiss at 12' o'Clock gain and treble. It's worse as I turn it up the treble. The bass knob does nothing to offer hiss one way or another. With the mic gain up about 75% and the treble up at 50% it's totally unbearable. I can't even fake it. When I turn the mic channel off by pushing the mic button the sound disappears.
From the tech at ADJ: "Ok I had a tech look at the unit I have & there is a small hiss when the volume was high. He doesn’t think there is going to be a fix for this or at least not soon. I would return the mixer wile you can."
They Acknowledge the fact they are shipping them out with a "small hiss".....I don't know about you, but if this is "normal" it's really dumb in this day and age. Especially because this unit allows for 3 mics of which 2 have XLR connections. I'm getting hiss WITH NOTHING ATTACHED...not even a computer. Just XLR Mains to Amp. I really love this mixer with VDJ.
I'm getting hiss WITH NOTHING ATTACHED...not even a computer. Just XLR Mains to Amp. I really love this mixer with VDJ.
Indeed.
Then why engineer 3 mic inputs and make 2 of them XLR.....AND onboard reverb? I'm just saying....they are throwing a unit to the massess with the capability to do it. I trust this brand but I think they need to rework this line or at least this mixer.
OK....I'm interested. Please try this for me. Unplug everything except your line out to your amp. Power it up, activate the mic (any of them) and then push the gains past half and the mic treble knob between 50 and 100 and see what you get. If you get no noticeable nausiating hiss coming out I will return my mixer and buy one just like yours. Please help out and post back or PM me what you get. I appreciate it.
OK UPDATE: The mic gain control can be all the way DOWN and the hiss still comes through when the mic channel is activated. Just the mixer master volume has to be be turned up in order to hear it.
Video showing exactly what I'm talking about! Yay technology!
View: https://www.youtube.com/watch?v=3uvqgLv1YV0&feature=youtu.be
I got word back from ADJ that the 14 mixer does this less but it's still there. The 10 is about the same as the 19. I don't know what to make of it. It's pretty wild. No mic attached.
What's it like WITH the mic .. still a lot of noise? Without the mic, it can be something simple like a lack of a noise gate, but if it doesn't go away with the mic, then it's a circuit issue. I know my cheap little Behringer B208d hisses if not connected to something .. and drops significantly when it is.
Hiss remains the same. Tested with Shure SM57 and AT3000 series wireless.
I've never heard of an open input allowing for noise. That's interesting though. Other than ground loop stuff, it should be silent.
Yes .. it should be. The output stages of older amps used to have thresholds that needed to be crossed before output started, so there was little noise with no signal. Current IC based amps tend to pass signal easier and need a noise gate that only passes signal when a threshold is reached .. probably a buck in parts, but many leave them out. Not saying that is the issue .. especially if the level is high enough to hear it when in use. My JBL PRX has a low level hiss with no signal, but it completely fades away when a signal is present.
A lot of this is a downside of "digital" and poor design. But .. it shouldn't be as bad as it is.
