The rear-end part of my 2-part Becker Mexico got corroded, and I had a company install a new Alpine radio up front. They tell me it's impossible to connect the "active base" powered amplifyer whoch drives the front door speakers. They tell me that they cannot connect the same speakers directly to the new radio because of impedence and ground problems. I seem to be stuck with 4 speakers, none of them doing the bass work. Anybody know better? ---mason

On the stock system, I think the inputs which send the bass signal to the rear to be amplified are line level, a function of the Becker stereo. If you have subwoofer outs on your new Alpine, you may be able to connect these to the inputs on the active base amp, with a splice job, which will power the bass woofers in the doors. However, not sure if the ohms are the same. With a new, more powerful stereo why not just add better speakers?

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro

The left and right side speakers share a common ground - one ground per side. When you move to a higher output deck you need to separate these grounds as the higher-wattage decks drive the channels separately. The wires, luckily, are tied together near the center console - remove it and you can find the speaker wires, cut the common ground, add new dedicated grounds, and off you go. This way you get dedicated LF, RF, LR, and RR channels.

Been there, done that -

Brian

Post this in the Car Audio section and you'll probably get a better response. Scott from LaJolla Audio is very knowledgeable.

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Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon