[Hidden-tech] Looking for Stereo Setup Assistance

[Michael Muller]

Hmmm... I thought wattage was wattage, no matter the cone size. It's 
totally possible that the stereo is under-powered for the speakers, but 
will they really just fuzz out when I get to 1/3 of the possible power 
output?

I do have a full stereo I can swap out to see if there's a difference.

Mik

Mik Muller, owner
Montague WebWorks
413-320-5336
http://MontagueWebWorks.com
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On 4/18/2017 11:49 AM, Robert Heller wrote:
> At Tue, 18 Apr 2017 10:54:53 -0400 Michael Muller <tech at montaguewebworks.com> wrote:
>
>>
>>
>> Hey all,
>>
>> With the coming of the good weather, I'm getting ready to set up my
>> backyard for outdoor sound.
>>
>> I already have four Advent Marbl speakers and a decent car stereo
>> hard-wired to a strong DC power supply.
>>
>> If I put the volume above 50% the speakers just put out fuzz. Total
>> crap. And this is with only two of the speakers connected. So...
>>
>>    * Is it the speakers? (175w RMS)
>>    * Is it the wiring? (16 gauge)
>>    * Is it the stereo? (18w RMS)
>>    * Is it the power supply? (12vDC* 10A = 120w)
>>
>> I'm looking for someone who works at a car stereo installation place, or
>> who really knows about this kind of stuff down to the technical wattage,
>> ohms, wire-length and gauge, etc. level.
> I don't know much about car stereo, but working with the Full Moon Coffeehouse
> sound system (with advice from Klondike), it seems like your car stereo is not
> putting out enough power to drive the speakers.  Are these Advent Marbl big
> indoor type speakers?  If so the *little* car stereo is not really designed
> for that.  It is for the *little* dashboard speakers typical in a car.  The
> "fuzz" output suggests that the stereo's output drivers are going into some
> sort of overload state.
>
> Is there some reason you can't use a proper high power (eg ~200W or something)
> home stereo system?  I fully understand using big speakers outdoors -- they
> would be needed to cover the space, but that means you need a powerful enough
> amp to drive them.
>
>> Ultimately I want to drive eight speakers from one unit, using the
>> "front" and "back" settings on the car stereo, and the "surround"
>> line-out on each of the four main speakers. See the attached PNG file if
>> you're interested.
> Be carefull of putting too many speakers on any *one* output: you will hit
> impedance and power load issues.
>
>> https://www.ebay.com/p/Advent-Marble-Main-Stereo-Speakers/69600291
>>
>> https://www.crutchfield.com/S-xO4AMhTXX8Q/p_500CDA9883/Alpine-CDA-9883.html
>>
>> Please contact me if you're interested in helping me on-site
>> (Greenfield), or pass this along to someone you may know who knows about
>> this stuff.
> I'd suggest John "Klondike" Kolher of Klondike Sound.
>
>> Thanks,
>>
>> Mik
>>
>>

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