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Hi guys. I'm new here. Have never ventured into ICE all my car ownership life because I personally like things "original" and "if it ain't broke, don't fix it." But anyway, I just bought a 2nd hand Mazdz2. The ex-owner had an ICE installed from I don't know where... (suspect JB - brand of speakers "Soundstream") which I thought sounded absolutely horrible, worse than my stock ICE in a BMW which was already bad enough... and he claimed he spent nearly $2,000 on them! 1. PROBLEMS When I got the car the RIGHT tweeter had NO sound, or was weak and cracking. And at volume "2", the ICE was already quite loud! So basically, 0 = off, 1=on, 2=loud, 3=damn bloody loud, 4=inhumanely loud. So the first thing I did was to look under the seats at the amp... 2. AMP AND WIRING HORROR What a terrible job!!! The amps were not secured and there wasn't much slack in the wiring (which is bad for the wires). The amp was also in the way of the rear passenger's legroom. As I fiddled with the fader and balance, I found out that the amps had left/right and front/back wired wrongly. From here, I'm already thinking to myself - what else was wired wrongly? Maybe +/- also reverse, who knows?! 3. AMP GAIN + LPF HORROR There were two amps. One Sony amp for the components, and another (I forgot the brand) amp for the sub. I found out the component amp had gains turned up to the MAX which resulted in a buzzing noise from the working left tweeter. I fixed the gain and swapped a few incorrectly wired cables. The I found out the sub amp LPF was turned OFF which resulted in horrible hums from the sub. I turned it ON, tweaked the LPF frequencies, set the gain (which was at MAX also?!). I sat down and "enjoyed" some music for the next 1 day. After tweaking the gains, LPF, it was much more bearable but I must say the tweeter suck! It's too loud (vs. the components) that I had the high frequencies right in my face and it was very uncomfortable to listen to. Wife also didn't like the "spider" emblem on the tweeter. So I started venturing into removing the tweeter... 4. TWEETER CABLING HORROR So I removed the scuff plate and some interior panels to reveal the hidden tweeter wiring and this is where I started to see some of the UGLY cabling job. The tweeters had nice high quality cables soldered to them, but right under the dash it was twisted together with cheap cables that seemed like stock cables that the car came with and then black-taped all over making the cable all yucky and sticky. I cut the cables, removed the tweeters... Me digging for tweeter cabling... *** INTERMISSION *** P.S. Although I have a seemingly simple 2-way hi-fi at home, I am no car ICE expert. But I must say I am a computer engineer, and I totally HATE terrible cabling jobs and this 2nd hand car has opened up my eyes to one of the worst cabling jobs I've witnessed in a car...