JBL Eons, Microphone and Noise

Hi all,

I used my new Eons I bought from Ben for the first time Saturday night and over all, I loved them. Actually, the first time for any powered speaker other then the Mackie 1500 subs.

I am a novice on anything that has settings but I will get better with that.

My problems were these.

1. From my vantage point, I heard a lot of bass in different parts of songs. When I stepped in front of the speakers, it sounded ok. I am sure this is not a problem but I am not used to it.

2. My biggest concern is when I would turn on my wireless mic, I would get a bass humm sometimes. If I would hold my mic in different locations it would stop or if I backed away from the speakers it would go away. Mostly when I would turn it on, the switch is on the bottom, it would humm until I turned the mic right side up. Now I don't think the crowd heard this because I seen no reaction from anyone.

Is this something with the mic or the speakers or a combination?

What do all of you recommend I set the dials to on the back?

Thanks. I am really gear stupid.

Karl

This is something with the mic... A easy low-cut filter should remove those small low frequency issues.

As for the bass being more heavy in the back, a simple idea is that anything under 100hz (or so) is omni-directional... Typically during my gigs, I hear a lot more bass that is actually being heard in the audience, therefore... Don't go by what you hear at your station, go out and listen to the volume in the crowd!

Thanks.

Anyone else. I figured that the base would be more for me but the mic thing is what is bothering me.

Ben? You out there buddy?

Karl

Thanks.

Anyone else. I figured that the base would be more for me but the mic thing is what is bothering me.

Ben? You out there buddy?

Karl

Where is the wireless sending unit in relation to your speakers?

I have the JBL EON's and I have used several different wireless mics with them. I never point head of the Mic towards the speakers, that will cause feedback as you know.

Are the speakers and Mic sending unit plugged into same source? Properly grounded?

These are all things I have learned from the gear guru's on this board.

The receiver is right in front of my rack on my table and the speakers were directly to the sides of the table about 4 feet on either side of the receiver and elevated of course on stands.

Again, the funny thing is it happened more when the mic was upside down while switching it on and off.

ANyone else have any clues?

We will see if it happens again this weekend.

Karl

Yep, I'm here Karl. I'm confused too. What wireless system are you running. I have not encountered anything with the symptoms you are describing. Especially the "upside down" thing.

Ben

Brother Karl,

Please, don't wait 'til the next show to debug this. If you can, set your system up at home and work it out there. :)

Karl

Give a slight cut on your EQ from the 40Hz to the 100 Hz tones and see if that works. I used to have a similar problem with my CVs years back anytime the head of the mic was lowered the bass hum would start. If this dosen't work try changing speaker placement a bit

Is Karl using a VHF or UHF wireless? Could a VHF higher frequency mic interfere with the EON's internal wiring possibly? Even though I am this forum's mod, and an engineer in my own right, I don't know enough about how the EON's shielding is constructed, or if VHF (if that's what Karl is using) interference would come into play.

If Karl is using a UHF wireless with selectable channels, could simply changing the channel be a solution?

What type of venue was Karl playing when this problem occurred? Did it have any kind of RF producing equipment nearby?

Just my thoughts.

I would first try EQ'ing it out.
Both with the EQ in your rack (if you have one) and then from the mixer (if you have a mic EQ).

As far as feed back, people have different opinions on that. Feedback can definitley be eliminated by EQing your system, but I also ust the Sabine feedback eliminator to ring out my system before every gig. You have to be careful though, you can blow out your speakers if you don't ring it out slowly. But once it done, you are set for the night.

Thanks for the replys everyone.

I am using a Audio Technica mic. Not sure of the number right off hand. It is a cheaper model. It has been great for 6 + years so I have kept it.

I will try your suggestions.

Karl

I've heard the humming proplem on the Freeway series. I dismantled one the other day for a competitor. Found nothing loose or any cold solder joints. Reassembled it and the hum was gone. ???
No idea why it hummed. (maybe it didn't know the words! :) )