Connecting a CD Player to a PA System ?

In our local church, we have different groups that use the hall for various functions.
We have a PA system that has numerous sockets around the church for plugging microphones into.
I was wondering if it would be possible to plug a personal CD player, which has a line output socket as well as an headphone socket, into the mic sockets without causing any damage to the PA System.
If I need a circuit diagram, please does anyone have one that I can build.?
Jim
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the_constructor wrote:

somewhere there has to be a mixer for all that lot. That SHOULD have line level input that you can use.

Damge, is unlikeley but ghastly overloads and distortion is. You will be 10-100 times higher signal than a mike produces.

First of all find out where all those mike sockets go, and report back.
I like the sound of this. I have told my wife to play Hendrix's 'VOODOO CHILE' as loud as possible as I get burnt or interred, whichever is the cheaper.

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We have a microphone on the pulpit that goes directly to the PA System and uses 1 mic input We have 2 radio mics on different frequencies that take up another 2 mic inputs We have numerous sockets all linked that go to the final mic input. We have to make sure that only one mic is used on these sockets at a time.
Selector switches and level controls regulate the outputs for each channel.
No aux socket.

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the_constructor wrote:

Then a DI transformer is what you need, unless there is a lin<->mic switch on one or more of the inputs.
There is nothing TO build. It's a specialised transformer in a box with two sockets!

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On 03/08/2011 19:20, the_constructor wrote:

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On 03/08/2011 21:19, Adrian C wrote:

Ah, whoops. Finger trouble. Disregard last post.
--
Adrian C


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<snip>

Somewhat OT, but have you considered promession? http://en.wikipedia.org/wiki/Promession I'm told it's the way to go. Don't know about cost, but I wouldn't be worrying about it anyway.
Nick.
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Nick wrote:

sounds good. Could take the powder and put it on the veg garden and let it decompose that way anyway.
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On 03/08/2011 18:47, The Natural Philosopher wrote:

In which case, the line output into a mic input overload will enhance the Experience...
--
R


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Ron Lowe wrote:

True: )
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I'm surprised that Grimly hasn't posted this link
(Amazon.com product link shortened) 2/ref=cm_cr_pr_pb_t
--
geoff

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On 03/08/11 18:35, the_constructor wrote:

You need a DI box:
http://en.wikipedia.org/wiki/DI_unit
They aren't very expensive to buy so I can't imagine it worth building one.
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Personally I get a big thrill from building something and seeing it work rather than just purchasing a box and plugging it in.
Very interesting article.
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Go to Maplins or somewhere similar and buy a 10 K ohm pot. (Potentiometer) a "LOG" one if they have one.
Wire the CD player across that, co-ax screened type cable from said CD player screen thats the outer braiding on One end of the pot, the Inner to the other.
Take another bit of screened coax type cable or a couple of bits of ordinary wire will do, keep them reasonably short.
Take One wire to One end of the pot thats got the screened or outer braiding on, and the other to the Middle connection of the pot.
This will give you a very simple attenuator volume control shouldn't cost more than a quid..
You can do the same with fixed resistors but this way makes it variable so you can twiddle it to whatever level you want...
from CD player ---------\ / \ /<---------------------------------------- to Microphone input \ / -----------------------------------------------------to mic input earth screened side
from CD player outer screen of cable
http://www.maplin.co.uk/dual-miniature-potentiometers - 2204?ordercode=JM83E
this one will do, you can use both sides one for the left channel and one for the right If you only have Mono inputs to your mixer then put the balance on one input full right, the other full left have fun:!...
--
Tony Sayer



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Luxury, that's got a spindle and costs very nearly a pound. Skelington presets are good enough for me ;-)
I've done this kind of bodge for 40 years, even been known to carry one in my suit pocket at wedding receptions "just in case". Never knew they had a posh name until just now though.
--
Graham.

%Profound_observation%
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On 03/08/2011 19:06, Cod Roe wrote:

Tons on ebay like:
http://www.ebay.co.uk/itm/Filter-Direct-Injection-Box-/260829321014?pt=LH_DefaultDomain_3&hash=item3cbaa39736
--
Cheers,

John.

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A DI box is a bit overkill. They are usually designed to bridge a guitar pickup etc (high impedance) without loading it and match the low impedance mic input, with as little level loss as possible. A CD player has a line level output, so a simple attenuator will suffice.
Although it would be better performance wise to use a line input to the mixer.
--
*Do they ever shut up on your planet?

Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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