I'm looking at upgrading the stock stereo with a sound processing unit, amplifier, speakers, and sub. I read a post a while back Here
that talks about upgrading the stock head unit with a sound processor. The premise is that the stock head unit cuts low frequencies or shapes the sound to make the stock speakers sound better. When aftermarket amps are installed, it's crap in and crap out.
I took to some engineering skills and hooked up my laptop running some free real time analyzer software
and playing some pink noise through the CD player, and found that this just doesn't seem to hold up (see attached picture).
The problem is, my laptop has a sucky sound card, so I couldn't get any higher than volume level 6 before it started clipping the signal, so I can't get any idea of how the frequency response changes at higher volume levels (you know, like the ones I listen to). I know that some stock manufacturers cut the bass at higher volume levels.
Rather than spend the money on a good RTA or soundcard, I'm taking to the forums to see if anyone has done this test already and could share the results. Do I need to spend $300 on the JL Cleansweep
, or can I get by with a less expense line output converter?