Last week I had another customer coming for sound tuning. The customer was not satisfied with the sound even with all that high end system in the car. Basically he has focal component speaker, focal 4-ch amp, 8″ focal subwoofer, all top of line monster cable, and Pioneer navigation deck. All these setup must cost him thousands of dollars yet there are a few problems about the sound quality.
First there is excessive engine noise coming out of the speaker when engine is on. Also, the amp when at high volume would turn it self off after about 10min of playing. Finally, the bass although is located right behind the driver side, it feels soft and delayed.
Luckily we were able to find out the reasons behind all these problems. First is the engine noise. After taking out the panels, for sure I found out that the RCA wire is tied up and ran together with the power wire. Even the customer has top of line MONSTER cable, it’s still not enough to prevent noise from getting into the signal. To solve the problem, we completely took out the RCA wire and ran it on the other side of the vehicle. Guess what, the engine noise is gone.
We also upgraded the ground point. Originally, it was screwed to the metal by just 2 little screw. I have seen this style of install several times. It might look secure, but as time goes by, the screw will start to get loose and you will end up with a bad ground. Do I need to explain what a bad ground can do? ^^
Last, the bass performance problem. The subwoofer he has was an 8″ sub. The previous installer even made a “custom” ported box for it. Well, when you listen to the sub, it’s slow and sloppy, so the tuning frequency and the box volume is definitely off, and my feeling is it’s too big. Plus the customer listens to dance music and techno music, so the last thing he needs was slow and off-beat bass. I recommended him to just get a matching sealed box, that way he will be surprised on what he has been missing.
To be continued.