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Multiple Radios/One speaker

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cfn

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I am planning my install of CB, Moto 1220 UHF, Uniden 996XT scanner and Kenwood TM V-71A. I have seen a thread where the speaker output of multiple devices can be channeled into one speaker but I cannot locate it. Can anyone help with a link or solution? Thanks in advance.
 

davidgcet

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are you going to switch them, or are you wanting full time audio from each thru it? if any of them have a non-ground negative audio lead and another has a grounded negative lead, then expect a blown audio amp. the better bet would be to install multiple speakers but hide them under the dash/seat/etc.
 

fineshot1

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There used to be a company called fleet radio products that made a great speaker audio combiner
but it was a bit pricey( approx $150 ) but they went out of business around 2008.

It had 4 speaker audio inputs and one speaker audio output. Your gonna have to find something
like that.
 

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LesWurk

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do not know how well it would work because don't see input impedance but microphone mixer might do the job, could always return it it it didn't satisfy you

4-Channel Stereo Microphone Mixer - RadioShack.com




I am planning my install of CB, Moto 1220 UHF, Uniden 996XT scanner and Kenwood TM V-71A. I have seen a thread where the speaker output of multiple devices can be channeled into one speaker but I cannot locate it. Can anyone help with a link or solution? Thanks in advance.
 

gmclam

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A microphone mixer wont just do the job between the speaker outputs and a speaker unless in incorporates its own built-in amplifier. You'd be better off using line inputs (rather than mic inputs).
 

SmitHans

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I like having a speaker for every radio. Because the speakers are placed in different locations, I can tell which radio is active by where the audio is coming from without having to look at the console.
 

n7lxi

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+1 for the RDL stuff. we used the little "stick on" DAs and amps all the time for projects like this. For example, in a remote vehicle that I helped build, we had an cue from a console, a 2 way radio output (for comms with the radio station) and the IFB (with program mix minus) all mixed into one speaker through a stick on.,

Radio Design Labs Product Subcategories

Works like a champ on 12v, set 'em and forget 'em.
 

W2NJS

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The RDL units are great and are well known as the audio man's friend. Can't tell you how many times one of their stick-ons saved my bacon on specialized audio setups. Best part is you can call them for advice if you have a problem.
 

K9JDN

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What ever happened to Fleet Radio Products? Does anyone know? Just curious, since their 4 ch. combiner/amplifier product was GREAT! Did another company pick up this product, under a different name? I've been searching for another one or two of these units, but they very seldom come up for sale on the net.
 

c5corvette

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So which RDL device do you use to combine your speaker level outputs?

It appears to me that you need to reduce speaker level to line level and combine with the RDL device and then run to a new amp and then to the speaker.

Which RDL device?
 

homeinva

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this works for a base set up

I am using the radios shack 4 channel mixer with a set of power computer speakers for the audio output

just hook one radio audio output to the left aux input one to the right aux input (aux input 1 )
do the same for aux input two
set the mixer to stereo you will get the audio from all 4 radios through the amp. speakers
hook them up to the output of the mixer
you can then adjust the audio level for each radio
what it will do is give you two radios on the left speaker and two radios on the right speaker

runs on 9 volt battery but get the 9 volt ac adapter
i used 4 ( radio shack number 42-2444 ) cables to hook the radios to the mixer rca to 1/8"
take the audio cables form the speakers and plug into the output of the mixer There need to be rca plugs to 1/8 " stereo plus ( i used the rca to 1/8 stereo cable and used a 1/8 " stereo coupler to connect the two

works great here

just remember to label the slid to what radio it is


Raymond
 

c5corvette

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This is the best way I have found...

BEHRINGER: MX400
Use the Behringer and 1/4 to 1/8 phono plug adapters.
Its small and runs on 12VDC - perfect for mobile applications.
You will need an amplifier or an amplified speaker (Moto made one that is nice.)

If your scanner doesn't have REC or LINE out, you have to play with the level controls a lot.
If one of the radios is a two-way with hot audio out, you might want to buy a car stereo adapter that converts speaker level audio to line level with an adjustment point (hint when using these since they are stereo use one channel [L or R] for one radio.)
 
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Old thread bump: Command Communications has started manufacturing the Fleet Radio 4-channel speaker combiners again. I just picked 2 up at $200 apiece.
 
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