S4Rules

The Bose system lacks highs, mids and weak at lows. Just not very clear. I have a B6 S4. Can I just replace the amp or do I need to do the amp and speakers also? What are some aftermarket speakers that will fit the B6 A4/S4? My old B5 w/Bose had speakers with different Ohms than aftermarket amps so that needed both a new amp and speakers.
Thanks,
Paul

Gerbosi

I put a 500 watt mono channel amp in the trunk powering a single 10 inch JL Audio W7 subwoofer. I kept all the other speakers stock. It bumps pretty hard now without drawing too much attention.

deepdelicious

Hopefully this info that I dug up and have used in the past will help you out. BOSE generally uses speakers with an impedence of roughly 1 ohm, compared to the common 4-ohm rating on most widely available components. The BOSE speaker places far less load on the amplifier, allowing lower power output to be used to achieve a given volume level. A BOSE power spec would be rated at the lower impedence, but if connected to a 4-ohm speaker, the actual output would drop significantly. If BOSE speakers are connected to a conventional amp, it'll most likely destroy the speaker AND fry the amp. Most conventional amps can't handle the 1-ohm load.If considering upgrading the stereo, understand some of the system design elements. Each BOSE amplifier contains active equalization circuitry tailored to the specific driver (not you, the speaker!) characteristics and the location of each original BOSE speaker. In addition, the speakers are mounted in ported enclosures (the big, odd-shaped black plastic boxes). The air volume and port tube (hole in box where the air comes out when the speaker's working) size are designed to resonate at a specific frequency to enhance the bass response of the BOSE driver. If mounting aftermarket speakers in the stock enclosures, use aftermarket amplification, and it'll take a fair amount of effort to achieve a good physical fit due to BOSE's unique speaker sizing.

oggie_s

i'd also suggest that you try image dynamics subs... very musical but can still move enough air...

04S4SouthCali

Go with Kicker and Kenwood, but make sure to Dynomat.
<img src="http://pictureposter.audiworld.com/78725/system_left.jpg">
<img src="http://pictureposter.audiworld.com/78725/system_right.jpg">

S4Rules

If I replace the headunit only won't it fry the Bose speakers? Please let me know the fitment and size of speakers that will fit the B6 A4.
Thanks

oggie_s

the most bang for the buck is just adding a monoblock amplifier and a subwoofer. the other solution is to keep the head unit and disconnect bose amp, install the new amp and new speakers... this is the setup that i had on my B5... very stealth and excellent sound... i did install focal speakers all around with JL Audio amp and image dynamics 12" sub...

front speakers are 5 1/4 and rear deck speakers are 6 1/2... i disconnected speakers in the rear doors...

hope this helps...

Audi S5 TC

It's funny how the automotive press loves the Bose stereo system in the B6 A4/S4 yet the customers bitch and moan about it incessantly.

S4Rules

It really does sound like crap! Especially if you've listened to Acura's 5.1 Dolby System! No Compar

Scotty (UK)

Do you have the Avant? I was out in a friends S4 avant and it sounded nothing like my saloon.