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Separate amp for am and fm?

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Old Mar 17, 2003 | 07:25 PM
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Question Separate amp for am and fm?
Do newer MBZ's have a separate amps for both am and fm?

Thanks
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Old Mar 18, 2003 | 11:49 AM
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Why would anyone want/need separate amps for AM and FM? Makes no sense at all. Why do you ask?
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Old Mar 18, 2003 | 06:57 PM
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Signal --> Antenna --> Tuner --> PreAmp --> Amp --> Fader/Balance --> Speaker
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Old Mar 18, 2003 | 09:18 PM
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There are such things a antenna amplifiers but I doubt that Mercedes has them in thier cars. Car radios usually have excellent sensitivity that would make such an amp superfluous. Local/distance switches are actually attenuation to knock down powerful signals that are too much for a radio tuner to handle.
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Old Mar 18, 2003 | 10:16 PM
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The C class has antenna amplifiers. The ones in the coupe can be damaged by water when tint shops try to install the tint from the back of the car with the hatch raised.
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Old Mar 18, 2003 | 11:22 PM
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Originally posted by Lynn
The C class has antenna amplifiers. The ones in the coupe can be damaged by water when tint shops try to install the tint from the back of the car with the hatch raised.
Thanks Lynn.You mention "antenna amplifiers" is there a seperate antenna amp for both am and fm?
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Old Mar 18, 2003 | 11:28 PM
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Originally posted by Kal Rubinson
Why would anyone want/need separate amps for AM and FM? Makes no sense at all. Why do you ask?
See my post titled Thoughts Please, after you read it I would appreciate any suggestions, the reason I mentioned separate amps for am and fm is a local stereo shop installer said he was having a problem similar to mine on his 99 Jetta and his am amp was bad, maybe it was an antenna amp as mentioned by Lynn in this current thread.
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Old Mar 19, 2003 | 12:19 PM
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1. Amps usually means audio amps in an audio system. Antenna amps are something else.

2. Where is your thread "Thoughts please?"
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Old Mar 19, 2003 | 08:44 PM
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Re: Separate amp for am and fm?
Originally posted by RJC
Do newer MBZ's have a separate amps for both am and fm?

Thanks
I know in ML it has an AM amp in the liftgate and from there I think most/all MB model does has one. This amp require power from the HeadUnit to power up if you change to after market HU you need to wire this line to the power out on the new HU. Most of the time the installer don't know it there and the result is no AM.

Tony
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Old Mar 19, 2003 | 10:04 PM
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From: 2000 ft over the FL coast in a B-17
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Originally posted by Kal Rubinson
1. Amps usually means audio amps in an audio system. Antenna amps are something else.

2. Where is your thread "Thoughts please?"
Kal, It's under the audio and electronics section, just scroll down and you'll find it.I just gave this post a bump up to make it easier to find
Last edited by RJC; Mar 19, 2003 at 10:13 PM.
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Old Mar 19, 2003 | 10:10 PM
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Re: Re: Separate amp for am and fm?
Originally posted by tonyML
I know in ML it has an AM amp in the liftgate and from there I think most/all MB model does has one. This amp require power from the HeadUnit to power up if you change to after market HU you need to wire this line to the power out on the new HU. Most of the time the installer don't know it there and the result is no AM.

Tony
Thanks Tony. My speakers sound like they are blown in AM mode and when I switch to FM they sound fine,could a bad AM amp be the problem? There is also no static in AM but as the annoucer speaks it's when the speakers sound blown.

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Old Mar 20, 2003 | 01:44 PM
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Originally posted by RJC
Kal, It's under the audio and electronics section, just scroll down and you'll find it.I just gave this post a bump up to make it easier to find
Thanks. Well, the answer may be the crappy AM reception in general, a poor connection to the AM antenna or, if such exists, the separate antenna amp for AM. What evidence is there for the latter?
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Old Mar 20, 2003 | 04:01 PM
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Re: Re: Re: Separate amp for am and fm?
Originally posted by RJC
Thanks Tony. My speakers sound like they are blown in AM mode and when I switch to FM they sound fine,could a bad AM amp be the problem? There is also no static in AM but as the annoucer speaks it's when the speakers sound blown.

Thanks
Did you look at the sound setting on the AM mode, on my I have separate setting for each mode AM, FM, CD, NAV.....etc.

Other option is bring it into the dealer, maybe the ground connection at the antenna is loose.

Sorry that all I know.

Tony
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