I’m posting this mostly for me, but as a general piece of information, this offers a good explanation of how bass works in a sedan. In my old Honda (search the articles), the trunk and passenger compartment were sealed off from each other as show in figure 4. This prevented the cancellation of sound waves shown in the previous figures.
In digging through some old pictures, I came across the pictures of my car audio system from 1994. This was built into a 1993 Honda Accord EX with the sole intention of entering IASCA competitions. While the scene has certainly changed since I was in the game, the sound remains the same. Loud, quality audio systems that reproduce a concert-level music atmosphere.
The system took first in every competition entered, and even took best of show in the 1994 Car Toys season finale. I managed to snag enough points for a nationals invitation, but bought a house and didn’t have the funds to compete at the national level.
The system consisted of the following components:
- Alpine In-Dash CD Player
- Alpine 6-Disc CD Changer
- Alpine ???? 7-Band Parametric EQ
- Alpine 3656 Active Dividing Network
- (2) a/d/s/ PQ-10 Amplifiers (bridged to 2×100 for tweeters and midranges, one amp per channel)
- (1) a/d/s/ PQ-20 Amplifier (bridged to 2×200 into the subwoofers)
- Boston Acoustics Pro series 6.5″ midrange and 1″ tweeter, custom mounted into stock locations
- Clifford Alarm System with Remote Start, Window and Sunroof Automation
- Optima Red Top second battery
- 1F Stiffening Cap
You can see pictures of the system in the gallery.
With all the talk about cars lately, I just wanted to mention that I run a motorsports oriented web site for the Oklahoma and Arkansas called Green Country Motorsports. The site is a simple portal with a forum and features many members who are active in area Autocross, Rally, Open Track (Hallett) and some drag racing events.
The site has been around for more than four years and we’ve managed to keep a pretty solid base of regulars and the conversations are focused and mature. If you are into motorsports in the area (Tulsa, Oklahoma City, Bartlesville, Fayetteville, Stillwater), you might check it out. We keep an updated calendar of upcoming area events as well, and the Northeastern Oklahoma SCCA Solo II planning committee regularly mention events and results on the site.
So stop by and check it out!

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