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Subwoofer suggestions please! Yes I have included the details no one ever does!
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<blockquote data-quote="vector" data-source="post: 7527587" data-attributes="member: 635692"><p>I thought I would update this thread with what I ended up buying and building and my results.</p><p></p><p>First to answer some of the other posts I ignored, sorry, I went off to buy and build! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>I wanted roughly 135db as that is what the system in my BMW M3 will hit and I was decently happy with that output.</p><p></p><p>I ended up finally buying a single 15" TC sounds 3000. I bought it locally used from a guy in Boulder who I think may be Ryan Shaw who posted above? I don't know.</p><p></p><p>Anyway I am really happy with the sub itself to get that out of the way. It is amazing. However there is a story and some questions for you guys.</p><p></p><p>I bought the sub and the mb quart onyx 1500d that I suggested above. I built a 3 cubic foot box tuned to 28hz as was recommended to me by TC sounds. The sub is wired to 1.5 ohm and the amp sees about 1.8 with box rise. I decided to also put an amp in for my front stage so I installed a 4 channel rockford fosgate amp for the Morels.</p><p></p><p>After I got the system installed, I immediately realized I would have to upgrade my electrical system. When I had the system playing really hard dubstep at volume the lights would not only dim but almost go dark. So I did the big 3 leaving the original wiring in place too. I then upgraded my factory 65 amp alternator to a 150 amp alternator that I bought from Toyota as a direct fit. I upgraded the battery and installed a capacitor. I bought the best knu concept wiring kit of ebay for the amp runs and used welding cable for the big 3. So now the lights don't dim unless I have the system all the way up. I work for HP as an engineer so I have access to all the test equipment I need, which I used to set levels (yes I used a 30,000 dollar oscilloscope to set car stereo levels,lol) balance all the channels and then proceeded on to trying to create ruler flat frequency response...</p><p></p><p>Now I know this is an impossible mission in a car but I came pretty close when I did the system in my M3. So I started taking measurements and then trying to eq out some of the worst humps and dips. Most of the range I have very flat however I have a drop from 50 to 60hz that is 13db! No matter what eq adjustments I make this will not change!</p><p></p><p>I have tried eqing 50hz down, 60hz up, sub facing forward, sub facing back, sub facing sideways, sub facing up, opening the passthrough in my rear seat, and finally went and dynamatted my car. Still have the same result.</p><p></p><p>I then read about the TC 3k having an inductance problem right at 50hz and just to see if that was the problem, put the 2 12 inch type r's from my M3 into the lexus. Same dip! Agh!</p><p></p><p>I will say I wasn't impressed at all with the new system since my M3 with all alpine sounded so much better. Then after swapping the type R's into the lexus and the TC 3k into my M3 I realized the TC 3k sounded vastly better than the type R's! It was the Lexus that sounded horrible! I am out of ideas now. I can't stand the bass this car has now, as I love dubstep and this frequency response is making it sound horrible.</p><p></p><p>Any ideas? Honestly if I can't fix this I will sell the car, I spend 2hrs everyday in it listening to music and don't want to put the mileage on my bmw.</p></blockquote><p></p>
[QUOTE="vector, post: 7527587, member: 635692"] I thought I would update this thread with what I ended up buying and building and my results. First to answer some of the other posts I ignored, sorry, I went off to buy and build! [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] I wanted roughly 135db as that is what the system in my BMW M3 will hit and I was decently happy with that output. I ended up finally buying a single 15" TC sounds 3000. I bought it locally used from a guy in Boulder who I think may be Ryan Shaw who posted above? I don't know. Anyway I am really happy with the sub itself to get that out of the way. It is amazing. However there is a story and some questions for you guys. I bought the sub and the mb quart onyx 1500d that I suggested above. I built a 3 cubic foot box tuned to 28hz as was recommended to me by TC sounds. The sub is wired to 1.5 ohm and the amp sees about 1.8 with box rise. I decided to also put an amp in for my front stage so I installed a 4 channel rockford fosgate amp for the Morels. After I got the system installed, I immediately realized I would have to upgrade my electrical system. When I had the system playing really hard dubstep at volume the lights would not only dim but almost go dark. So I did the big 3 leaving the original wiring in place too. I then upgraded my factory 65 amp alternator to a 150 amp alternator that I bought from Toyota as a direct fit. I upgraded the battery and installed a capacitor. I bought the best knu concept wiring kit of ebay for the amp runs and used welding cable for the big 3. So now the lights don't dim unless I have the system all the way up. I work for HP as an engineer so I have access to all the test equipment I need, which I used to set levels (yes I used a 30,000 dollar oscilloscope to set car stereo levels,lol) balance all the channels and then proceeded on to trying to create ruler flat frequency response... Now I know this is an impossible mission in a car but I came pretty close when I did the system in my M3. So I started taking measurements and then trying to eq out some of the worst humps and dips. Most of the range I have very flat however I have a drop from 50 to 60hz that is 13db! No matter what eq adjustments I make this will not change! I have tried eqing 50hz down, 60hz up, sub facing forward, sub facing back, sub facing sideways, sub facing up, opening the passthrough in my rear seat, and finally went and dynamatted my car. Still have the same result. I then read about the TC 3k having an inductance problem right at 50hz and just to see if that was the problem, put the 2 12 inch type r's from my M3 into the lexus. Same dip! Agh! I will say I wasn't impressed at all with the new system since my M3 with all alpine sounded so much better. Then after swapping the type R's into the lexus and the TC 3k into my M3 I realized the TC 3k sounded vastly better than the type R's! It was the Lexus that sounded horrible! I am out of ideas now. I can't stand the bass this car has now, as I love dubstep and this frequency response is making it sound horrible. Any ideas? Honestly if I can't fix this I will sell the car, I spend 2hrs everyday in it listening to music and don't want to put the mileage on my bmw. [/QUOTE]
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