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The answer to your question varies depending on your specific application. Because you stated that you're interested in the "alpine type r subs" I can only assume you're interested in using at least two subwoofers with this amplifier. If this is the case, you will want to select the Dual 2 Ohm models. Currently, this impedance is only available in the 12" size, so, hopefully, the custom box you plan to use will accept this size.
Because these subwoofers are dual voice coil and the amplifier is a "mono Class D" you will need to wire the two voice coils in series, which will present a 4 Ohm impedance for each subwoofer. You can then wire each subwoofer in parallel to the mono channel amplifier to get the 2 Ohm impedance and the 1000 watts of RMS output. This wattage will be evenly split among the two subwoofers providing 500 watts RMS to each. This application will allow you to realize the full potential of the amplifier and subwoofers at the same time.
I hope that helps.
If anyone else can explain this better than I have, please do. It can be a little complicated.
thanks for the advice and hey i think you guys should look in to putting these boxes on your web site they are sick and they are for camaros and firebirds and do have any idea how dbs my system will put out because i want to know if this setup will break my glass in my 1995 camaro and im putting 2 alpine type r's in with the alpine amp and can you seguest any other sound proffing other than dynomay because its to expensive and heavy here is the web site to the boxes they make alot of boxes but i think your website just needs the camaro ones especially the t-top box its sweet and just what im looking for and i know lots of guy that are looking for the same kind of box because they want to subs but dont want to give up there t-top storage space and when you look at the t-top box can you tell me what kind of box it is i mean type 1,2,0r 3 and if the subs ive picked will sound good in it and again im interested in the t-top one but they make many others so if you could take a look and get back to me i would really apreaciate that and im interested the 2 12's t-top box
here is the website for the boxes
I cannot agree with Keith more on this topic. He is absolutely correct. One of the major reasons we get calls from people is that they have blown their subs or burned out their amps. It is all from the lack of matching them up correctly. The easiest way to ruin your equipment is to under/over power your speakers or to run your amp too hot. Even the best amps out there still have ratings that you should pay close attention to and stay within the limits listed. As Keith said, even being slightly off from the recommended impedance levels can damage your equipment.
Great post, Keith. I bet that if people chimed in on this topic, that we would hear from a lot of people who have damaged their equipment in this way. So, take heed guys and your equipment should last you a long time.
I recently got a 2 ohm Alpine type R, would it be compatible with this amp.... http://www.crutchfield.com/S-nQU9qNDEcIP/cgi-bin/ProdView.asp?g=120&I=113KAC8103&search=Kenwood+VENDORID113&SearchDisplay=Kenwood
Sorry... I know it seems like a dumb question to most of you.
(I dont know if the link works, the part number of the amp is KAC-8103D)
Since you have the Type-R subwoofers, I would not get that amp. A dual 2 ohm voice coil subwoofer presents either a 1 or a 4 ohm load to the amp. Since most amps are not 1 ohm stable, we use the 4 ohm method. This means that you need to find an amp that outputs something around 500 watts at 4 ohms. The Kenwood KAC-7203 amp is a great choice as it will output 500 watts at 4 ohms in bridged mode.
Any other ideas?
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