Here's What I got:<br>-Audi Bose Package<br>The problem: muddy bass, poor mid range up front<p>What I already own but not installed:<br>-Sony 35x4 bridgeable MOSFET amplifier 4/3/2<br>-T82 Bazooka 8" tube<p>Here's what I want:<br>-More mid range, crisper bass.<br>-Use my existing equipment coupled with a new set of 5.25" MB Quart components up front.<p>The Advice I need:<br>-How to put these elements together.<br>-What level of MB Quarts (reference, autobahn)?<br>-Should I bridge the Sony amp to power the MB Quarts? (90Wx2)<br>-Can the Bose amp be bridged to just power the rear doors and rear deck?<br>-Should I scrap the bazooka tube?<br>-Rienforce the rear deck?<p>Any advice would be great. Just wanted to get some thoughts before I go forward.<p>

Again the universal question; what's your budget? You could use MB Quart "referenz" separates (5.25"mid + tweeter) in the OE door locations, using the front chanels of your amp, & bridge the rear channels into the Bazooka (although I still recommend the StealthBox). Without knowing budget there's almost no way of being much more help.

My first bit of advice is very simple: Take no one's advice about which set of MB Quart speakers to buy. My reason for saying this? No one other than yourself will be the one seeking satisfaction from your new audio upgrade. No one on this or any other forum can tell you with any certainty what will sound best to your ears. Therefore, I say to listen to the different lines of MB's at a dealer, preferably in a vehicle. If a vehicle is not available, a sound board will have to do. DO NOT buy anything until you have listened to it and feel that it meets your standards and budget.<br> As for the advice you seek, let me give you a bit of background as to why I say the things that I do. When you go to a concert, you certainly don't turn your back to the stage. So why should you do this in a car? Simply put, get as much bass as possible in the front of the car. This goes for other frequencies as well. If you can create a good soundstage in front of you the sub-bass situation is a simple matter. As for amplification for your front stage I will say this: Buy as many clean watts as possible! In your case, bridge the Sony for the fronts. The rear speakers are totally useless in my opinion, but many people like some ambience and rear presence. If this is your case, just let the factory radio continue running them. Remember, you are trying to achieve a realisitc FRONT stage.<br> The sub-bass question is simple, but potentially costly, depending on what you expect from your sub system. Remeber one thing: Sound is simply composed of moving waves of air. If you contain your sub system to the trunk, it will act like an infuriated caged animal in your trunk trying to get out. You will end up with a rattling trunk lid and parts shaking loose in your bumper You want to let the air move freely from the trunk to the passenger compartment. If you want to get rid of the rear fill in the deck, those holes will be sufficient for air to travel to and fro. You can have a bandpass enclosure built. It could be designed so that its ports access the passenger compartment; It will be more costly due to its complexity and venting it into the interior. A free-air setup, aka infinite baffle, which uses the trunk as enclosure could be ideal for your needs and will produce marvelous results sonically without requiring an enclosure to gobble up your trunk space. Talk to an experienced installer about this decision. Find one that has an excellent audio system himself, possibly competes, and is a music lover in general. Those are steep requirements for installers these days, most are probably just having fun as a part time employee that is not very helpful when he should be. If I can assist you in any way feel free to Email me! Good luck!<br> <br>

I totally agree with what your post said. My question to you is: What sub set-up do you currently have in your A4? I have been considering upgrading, read throwing away, the stock bose system. I haven't heard a single infinite baffle (rear deck) woofer that sounded tight enough for my tastes. Has speaker technology improved so that infinite baffle works? My last system about 3 years back consisted of an Eclipse CD Tuner, AudioControl EQX2, Soundstream Ref amps, Canton separates, JL 10W4 woofers within a sealed enclosure. Anyway, I told myself I wouldn't do that again when I bought the A4, so I got BOSE. Big mistake!!! My ears can't take it anymore. My problem now is finding a good installer in my area who knows the A4. Well, thanks for reading my babbling.<p>Paul C