antenna amplifier question
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New Member
Joined: Jun 2006
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antenna amplifier question
i have searched the forums and cant find were to buy this (antenna amp) or for that matter what exactly it does, if any one could help or has a wiring diagram so i could provide power from somewhere in the trunk maybe.
thanx
thanx
AudiWorld Senior Member
Joined: Nov 2003
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The antenna amp is only needed if changing the HU from stock.
The stock HU has an antenna amp already in it, so if you upgrade the HU then you nee to add the amp in order to get decent radio reception. It's just a small cylinder that plugs into the antenna input on the HU, the antenna cable then plugs into the other end and there is a flying lead that needs to be hooked up to the power ntenna feed on the new HU, to give it power when the HU is switched on.
Some older Audi models circ 1996-99 had the OEM amp in the base of the bee-sting aerial or as a seperate box buried in the trunk. But as these tended to fail quite regularly, Audi changed the design to make it easier to swap out.<ul><li><a href="http://www.caraudiodirect.co.uk/product_info.php?products_id=211">http://www.caraudiodirect.co.uk/product_info.php?products_id=211</a</li></ul>
Some older Audi models circ 1996-99 had the OEM amp in the base of the bee-sting aerial or as a seperate box buried in the trunk. But as these tended to fail quite regularly, Audi changed the design to make it easier to swap out.<ul><li><a href="http://www.caraudiodirect.co.uk/product_info.php?products_id=211">http://www.caraudiodirect.co.uk/product_info.php?products_id=211</a</li></ul>
Audiworld Junior Member
Joined: Apr 2006
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where can we get this antenna amp, or where is the stock on located.
I changed my headunit aswell, the unit gives fm signal but its not strong alot of static, and my ford non cd and non tape give better reception...also i dont get any AM and i had it installed at a shop!
AudiWorld Senior Member
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As I said the stock one is usually inside the original Concert/Symphony HU
Not sure who sells them in the US - Autotoys?
But it depends on the model of Audi. On a 2000 A4 The Antenna Amplifier is located on the rear driver's side roof pillar, behind the panel.
So you need to first check to see if there is a feed on the power ISO connector that would have been getting 12v from the Audi HU, but is not getting anything from the new HU. Check the diagram on the top of the Audi HU. Find the power connector and then the connection showing a little switch usually th pin next to the perm live shown as UB+. If this is wired on the Audi loom then chances are it is powering an external antenna amp. So next check this pin corresponds to the power antenna output on the new HU. Chances are it won't be. Using a very small watchmakers screwdriver you can release the pin and slip it into the right location for your new HU. If there doesn't appear to be any wiring connected to the switch then the amp must be inside the HU so you'll need to install the aftermarket amp. The antenna amp on my A4 is external, but evn connecting it up to the right power antenna feed on my Alpine still gave crappy FM, so I installed this amp and the problem was solved.
But it depends on the model of Audi. On a 2000 A4 The Antenna Amplifier is located on the rear driver's side roof pillar, behind the panel.
So you need to first check to see if there is a feed on the power ISO connector that would have been getting 12v from the Audi HU, but is not getting anything from the new HU. Check the diagram on the top of the Audi HU. Find the power connector and then the connection showing a little switch usually th pin next to the perm live shown as UB+. If this is wired on the Audi loom then chances are it is powering an external antenna amp. So next check this pin corresponds to the power antenna output on the new HU. Chances are it won't be. Using a very small watchmakers screwdriver you can release the pin and slip it into the right location for your new HU. If there doesn't appear to be any wiring connected to the switch then the amp must be inside the HU so you'll need to install the aftermarket amp. The antenna amp on my A4 is external, but evn connecting it up to the right power antenna feed on my Alpine still gave crappy FM, so I installed this amp and the problem was solved.
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