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New member Username: ZzimPost Number: 1 Registered: Aug-06 | Ok just got my new sound system put in my car yesterday I have 2 alpine 12" type R sub woofers in a sealed box. I have one 2 channel amp, is a Rockford Fosgate Punch 550.2. I got it installed a best buy because i work there and i got a discount. Now I think they bridged the 2 channels and so its running a 150 W x 2 @ 4 Ohms RMS and the subs can take up to 500W. I dont know much about this stuff and i dont even know if i am talking about the right things, but my friend has the same subs and they sound like 4 times louder then mine not sure what amp he had he moved a wile ago an I stoped talking to him just want to know if any of you had any suggestions on an amp i am thinking about returning the amp and getting this one. http://www.bestbuy.com/site/olspage....6&type=product O and btw the sub has to be from best buy becasue i get a big discount on it. Link to subs http://www.alpine-usa.com/en/product...odel=SWR-1242D Link to Amp http://www.rockfordfosgate.com/produ...3&locale=en_US |
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Gold Member Username: CtmikeCt. Post Number: 1422 Registered: Feb-06 | link don't work for that amp. but i have the same subs and in a sealed box they do kinda suck. put them in a ported box tuned about 32-35hz, and give each sub 600-650wrms and you'll be alot happier. |
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New member Username: ZzimPost Number: 2 Registered: Aug-06 | Ok i am kind of a new when it comes to this stuff so you will have to help me out here what is a ported box I know of sealed and vented....and how do you tune a box in hz. I am a big newb. Here are the links again hope they work this time. Amp I have: http://www.rockfordfosgate.com/products/product_details.asp?cat_id=2&series_id=6 &family_id=20&item_id=106463&locale=en_US Amp I want: http://www.bestbuy.com/site/olspage.jsp?id=1141762608776&type=product |
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Silver Member Username: Tiggerboi87Pensacola, FL United States Post Number: 221 Registered: Jun-06 | You can get two Alpine MRD-605 amps and run each one to each woofer. The best buy i live close to sells them and they are good for that sub depending on the VC config. I had two of these and two type-r 12's myself and it was pretty descent to me but then i upgraded. |
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Silver Member Username: Tiggerboi87Pensacola, FL United States Post Number: 223 Registered: Jun-06 | just a thought |
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New member Username: ZzimPost Number: 3 Registered: Aug-06 | Well let me explain someting i have them sitting in a club cab in a dodge dakota. when the windows are closed and the sound is truned all the way up you can just hear them when your standing out side the truck. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3160 Registered: Oct-05 | make sure your box is built correctly to the specs of the sub |
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New member Username: ZzimPost Number: 4 Registered: Aug-06 | How would i go about finding if they are to correct specs. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3162 Registered: Oct-05 | if you buy a random box from the store, it wont be made to the specs of ur sub. check your "gain" also, and make sure its set to the pre-out voltage of your HU |
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New member Username: ZzimPost Number: 5 Registered: Aug-06 | Will the box make that much of a difference.. well any way here is the box that I have is it that its 2 big? http://www.bestbuy.com/site/olspage.jsp?skuId=6294388&type=product&productCatego ryId=cat03082&id=1072287759557 alos how do i chek the gain if there is some kind of tutoril on how to tune your system could you pls direct me 2 it I would greatly apprecieat it. |
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Gold Member Username: CtmikeCt. Post Number: 1429 Registered: Feb-06 | if that box is 1.25 cu. ft. per sub it's to big. alpine recommends .8 cu. ft. per sub with 1 cu. ft. the biggest, if i remember right. definately get one made pre fab boxes suck. and go ported with them. just read the manuel for your headunit in the back with the specs and it'll say the pre out voltage. |
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Gold Member Username: Dustin3Tigard, OR U.S. Post Number: 3166 Registered: Oct-05 | every HU has a pre-out voltage some 2 some 8 volts you have something on your amp called the "gain" or "level" -- on some amps. sometimes the gain is from 2-8volts (min = all the way counterclockwise, and max = counterclockwise) if ur HU was 4v output, you would set the gain right in the middle some amps go from millivolts - volts. then you just have to convert. i have seem 200 milivolts - 4v, so you just have to calculate. look in your amp manual ot see what the range of your gain is... the see what the pre-out voltage of ur HU is, and set that to your amp make sure your subsonic filter, is OFF and you LPF arond 80hz |
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Gold Member Username: RzarectorCoquitlam, Bc Canada Post Number: 1249 Registered: Dec-04 | box is not to big.. just not enough power for those subs.. u can go ported or sealed.. i personally liked them in sealed boxes better, of course they will get louder ported though |
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New member Username: ZzimPost Number: 6 Registered: Aug-06 | wow you guys have been a great help I guess i need a new amp and a smaller box and I need to check the setting on my amp for now. My friend has an L7 sitting in room in vented box so I am going to try hooking that up to my current amp and bridge the 2 channels to see how much louder it is. I know the L7 is a much better sub then the type R but i just want to see how is sounds. If any one had any onther suggestions pls let me know. |