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Kenwood KAC-729S Car Audio Amplifier

Newbie Install Question

By paulrmc - usenet poster


Hey everyone,
                     I have a 2001 Mercury Cougar C2 with a 6 Cd Changer
in-dash.  I have a Kenwood KAC-729S 600 W amp and I don't want to take out the
radio.  I went to the Wiz to have the install done, using the speaker level
inputs on the amp.  The Installer there told me that he's not allowed to
install the amp on an in-dash changer because the radio blows up after
everything is connected when there is a changer present.  I asked him what I
could do then since I just bought this stuff a few months ago and it's a brand
new car, and his only response was "buy a new radio that lets the amp be
connected to it".  So my question is, is this true?  Am I stuck with an amp
that can't be connected to the stock radio?  Do I have any other options like I
line level converter or something like that?

Thanks,
            Dave

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Solution #1
posted on Aug 10, 2005
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Rogers

Rogers - usenet poster

Rank:Apprentice Apprentice
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This is the same thing I've been saying.  He never questioned the amp blowing
up, he said that the amp was fine.  His EXACT reasoning to me was, "The head
unit itself will 'blow up' and not work anymore, this is because the signal it
puts out isn't strong enough for the amp"  How can a weak signal blow up the
RADIO when the amp is connected to it? He never said that I'd break the Amp.
He said that he couldn't do the install because when they installed amps on
other in dash changers, the radios later broke.  Which means he might have been
doing something wrong.  I questioned everything, like using the speaker level
inputs.  He was kind of saying that when the amp is attached to the head unit,
the signal is too weak and this causes the head unit to overload or "blow up".
I know I didn't misunderstand him, because he said that it blows up and you'll
end up costing yourself a ton of money to get a new radio from the dealer.  If
anyone else has any more, or if they've heard of problems on any cars in-dash
changers with amps,  please post it or email me.  I really appreciate the help.

Dave

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Solution #2
posted on Aug 10, 2005
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Powe33

Powe33 - usenet poster

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he's still wrong

--
Scott D. Freedman ----------  scott_freed @yahoo.remove.com
alpine audiocontrol orion mbquart and polk in a 92 accord coupe

``````````````````````````````­``````````````````````````````­``````

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Solution #3
posted on Aug 10, 2005
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LiZzIe

LiZzIe - usenet poster

Rank:Apprentice Apprentice
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I could see it killing the radio.  Highly unlikely though.

If the audio drivers are not rated that high in the radio and the amp tries
to pull to much current from them the could over heat.

If it over heats to much I could see the internals melting.

I know this is possible.  I'm not sure about the specifics in your case
though.

Later

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Solution #4
posted on Aug 10, 2005
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Mini Me

Mini Me - usenet poster

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why does the presence of a changer make a diff? what douche bag! some people
are stooooopid

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Solution #5
posted on Aug 10, 2005
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Jimmy NY

Jimmy NY - usenet poster

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I don't see why the amp would try to "pull too much current from them".  The
input impedance of line level inputs is usually on the order of thousands of
ohms...

--
Mark Zarella
www.decriminalizefreedom.com

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Solution #6
posted on Aug 10, 2005
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kcw573

kcw573 - usenet poster

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Oh my god. What would blow up the radio? Don't report that guy to his
manager. Have him beaten half to death. As far as "not enough power" to the
amps. That's absolute BS. There may be some sort of incompatibility problem,
but that doesn't make any sense. Speaker level inputs are designed to take
more power than line level inputs. And you feed amps power thru POWER
cables, not the damn inputs. That's why you use amps! I'm really trippin on
the "blow up the radio" thing. I don't work in car audio or anything, but
I've never heard of a car stereo blowing up.

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Solution #7
posted on Aug 10, 2005
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Cato

Cato - usenet poster

Rank:Apprentice Apprentice
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again that sounds like a lie.
an amp without high level inputs can usually take a signal from .5volts to 2
volts easily. any newer amp should handle 5 volts some will handle 10 volts
at the rca inputs.

how would the amp be over loaded if the signal was NOT powerful enough.

some one here might be more familiar with the stereo in you r cougar  and
can make better recommendations  but that guy was lying

--
Scott D. Freedman ----------  scott_freed @yahoo.remove.com
alpine audiocontrol orion mbquart and polk in a 92 accord coupe

``````````````````````````````­``````````````````````````````­``````

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Solution #8
posted on Aug 10, 2005
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Phoebe

Phoebe - usenet poster

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You might have misunderstood my question.  The installer wasn't saying that the
amp would break.  He was telling me that my actual Radio Head Unit itself would
"blow up" and not work anymore.  I didn't see how hooking the amp up to it
could do it, but I'm no expert.  

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Solution #9
posted on Aug 10, 2005
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lawyer

lawyer - usenet poster

Rank:Apprentice Apprentice
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report that guy to his manager. that is a blatant lie.
if you have speaker level inputs on that amp there should be no problem
unless your car has outboard amps (i.e. a premiums system)  if that is the
case they you may (MAY) need to by a special adaptor.  but eplace the radio,
no way.

--
Scott D. Freedman ----------  scott_freed @yahoo.remove.com
alpine audiocontrol orion mbquart and polk in a 92 accord coupe

``````````````````````````````­``````````````````````````````­``````

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Solution #10
posted on Aug 10, 2005
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Chandler

Chandler - usenet poster

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Thanks.  The system is the top of the line one offered in the cougars, but I'm
pretty sure that it doesn't have outboard amps, Something else the Installer
said was that it would blow up the radio because the signal from the radio
didn't have enough power to feed the amp.  Any more help would be greatly
appreciated.

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