All,

My parents own a church and were given 4 brand new microphones that require 2 AA batteries. We are stuck. We cannot figure out how to get them working. We have a Tall Portable L1 I believe. Phantom power can be turned on and you'll find that on the back of it. 

As for the L1...I need to know if it has phantom power and DO THEY BOTH NEED TO BE ON? OFF?

**Remember the microphones have 2 AA batteries in them**

 

Thanks for your urgent feedback.



Edit Subject: Previously "Phantom Power"
Bose Pro Community Admin  

Original Post

It would help to know the model and type of the mics and what model the L1 is: Classic/Model 1, Compact, or Model 2. The base of the classic/model 1 is a big circle with multiple channel inputs, whereas the Model 2 is very small and only has Tonematch and a 1/4” connection. The Compact has a built in subwoofer speaker in the base. 

We’ll need a model # to answer your question. As Danny said, they could be wireless and, if so, don’t use phantom power, but need a wireless receiver unit that would plug into a PA. Wireless mics would not have a cable jack on the end for a mic cable (XLR or, if a cheap mic, maybe 1/4”).

While there *are* mics out there that have an internal battery for power, they are few and far between, and wouldn’t require phantom power from the PA mixer unless they didn’t have the batteries in. They would also have an XLR jack on the end  

Jeff

All,

I apologize for not having the amount of info needed, but I live quite a ways away and am trying to help from there. I believe it's the compact one. I didn't look into the switches on the actual unit, but I know there was an on off button for phantom power on the back of the mixer. 

The microphones are wired and had the batteries in them when I check on it. I ended up just putting them back in the box, because we could literally get nothing out of them. 

I am wondering about that phantom power issue. 

IN GENERAL, as far as electricity goes, If the mics are powering themselves, I should have both phantom powers "off" correct?

One of you mentioned taking the batteries out and leaving the phantom power or "powers" on...Think that will work?

Go ahead and get some sleep tonight guys. I appreciate the effort and will having a chat with my mother tomorrow night on FaceTime. Hoping to get you guys a few more answers. Thanks once again.

Hi gensy5,

Welcome to the Bose Portable PA Community.

What model L1 do you have?

Since you mentioned the phantom power button on the back, this sounds like an L1 Classic or L1 Model I.

Phantom power won't hurt any modern microphone that is correctly wired. So there's no harm in turning that on, on the L1®.

Most microphones that take batteries can work without the batteries if the mixer has phantom power turned on.

OR

Insert the batteries, and if there is a on/off switch, turn that on. Then you can turn off the phantom power on the Bose system.

Please reply and confirm what model L1 you have, and give us the full make and model of your microphones.

Thanks,

ST

All,

I have spoke with my mother and she will head out to the church today to check on mics and options. She is going to try to take the batteries out and see if it works right away. All other mics on stage do not have batteries and work perfectly. Phantom power is "on" on the mixer.

Here is what I found:

MIC: STAGG SCM200 *AA Batteries*

Bose L1 with seperate sub woofer *Don't know if it has phantom power option*

Mixer: 6 channel Behringer with 7/8 and 9/10 channels roughly*** *With phantom power option*

 

Thanks for your effort on this. 

Hi gensy5,

I found a link to the STAGG SCM200

There's not a lot of detail on the manufacturer's site.

The simplest thing that should work:

  • Put the batteries in the microphones
    • Make sure the batteries are fresh
  • Turn off phantom power on the mixer unless you are using it for other microphones
  • Turn off phantom power on the L1 power stand. This is not needed if you are using a mixer between the microphones and the L1


Does that help?
ST

Well...at least they were free...I really can't find much of value on them either spec-wise, except some generic specs and a too-low-to-be-any-good price of about $30. Stagg music is more of a budget guitar/bass company you find in Walmart, etc, not known for selling mics. Which means these are basically cheap re-branded Chinese-made toys intended for kids and karaoke machines that some well meaning souls see as a great deal for "professional" equipment. Sadly, if they have to put "professional" on it, then it usually means it isn't.

This mic model's output impedance is unusually high at 1000 ohms, you normally would expect 150-300 ohms. Why does this matter? Well, to get proper signal coupling from a microphone or instrument to a mixer or amp input, you typically want the mixer's *input* impedance 10x the value of the mic or instrument going into it. If the Behringer mixer is anything like my Mackie's (probably so, since they copied a lot of their designs), the mic input impedance is generally around 3000 ohms, so would like to see 1/10th or less of that in a mic, i.e. 300 ohms or less, which this mic ain't. What's the effects of that? Well, besides possibly having issues with long cable runs (i.e. through a mic snake from the stage back to the mixer), most noticeable would likely be not being able to get as much volume level out of it as a typical (real) professional or even "pro-sumer" mic would give you, meaning you have to turn it up more on the mixer channel, resulting in more audible electronic hiss...and I gather that mic probably puts out more hiss to begin with by virtue of its cheap build quality. I had a cheap Samson mixer once that I bought just for basic on-location videography sound and it had so much electronic hiss I had to return it.

This isn't to say that these mics won't work for something, but I wouldn't do anything critical with them...maybe pass-around testimony mics, kids' skits or something? As a church tech director, I really cringe when people donate equipment rather than funds to the church's tech ministry. If they knew anything about what they were buying, they'd probably be *on* the tech team, but you really can't refuse it or you'll hurt their feelings...and after all, they mean well.

Hope this helps,
Jeff

I am reminded of the old adage, don't look a gift horse in the mouth.

Typically low impedance means less than 600 ohms, and high impedance means more than 10k ohms. Numbers in between are  considered medium. At 1000 ohms, the SCM200 should work OK as far as impedance is concerned. 

The mics in question are XLR, balanced. If they are not defective they should work with the mentioned equipment when connected with proper cables and switches or batteries in proper position.

Without knowing what else the Church has in the way of mics, these might be better than are currently in use. I once did a show with a Nady SP1 mic when nothing else was available, and was glad to have it.

O.. 

 

 

 

 

 

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