question on amp kits

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=32088
Printed Date: April 29, 2024 at 1:31 AM

Topic: question on amp kits

Posted By: Redstorm3
Subject: question on amp kits
Date Posted: May 13, 2004 at 7:15 AM

I have a kenwood 800 watts maximum peak power and was wondering if it is better to buy the rockford fosgate 8gauge 500w amp kit or to go out and buy each individually? or if there is something better out there?

Replies:

Posted By: Redstorm3
Date Posted: May 13, 2004 at 7:43 AM

I might as well add what type of subs i have so you guys can give me the best set up options...i have 2 12" Kenwood KFC-W3009<>wS('185','5') Single-Voice-Coil Subwoofers in a sealed box powered by the kenwood 800 w peak bridgeable 2 channel w/3 way power distribution (800 peak/460rms x 1 @ 4ohms, 460peak/230rms x 2 @ 2ohms or 300peak 150rms x 2@ 4 ohms) how should I hook this up?

Posted By: stevdart
Date Posted: May 13, 2004 at 8:37 AM

Any 8 ga. amp kit will work. The load on the amp using these two 4 ohm SVC woofers will be 4 ohm stereo, or 8 ohm bridged. You can get about 150 watts to each sub.

posted_image

The subs should play okay with that. They are rated at 200 watts RMS. If you already have this equipment, then go with it like this.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: Redstorm3
Date Posted: May 13, 2004 at 9:03 AM

If i hook up my subs w/out bridging them, would that be better? or will i get more if i bridge?

Posted By: stevdart
Date Posted: May 13, 2004 at 10:01 AM

It will be the same. 4 ohm stereo = 8 ohm bridged. When the subs are bridged, each channel reads a 4 ohm resistance load. So hook it up however it best suits your installation. You said both speakers shared a box, so use the bridged method.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: Redstorm3
Date Posted: May 13, 2004 at 10:06 AM

thanks a lot, appreciate the help

Posted By: thepencil
Date Posted: May 13, 2004 at 10:21 AM

Redstorm3,

The amp kit that you have is sufficient to do the job, but do check the minimum gauge requirement of your amp to be safe.

“If i hook up my subs w/out bridging them, would that be better? Or will I get more if I bridge?”

Yes, you are better off not to bridge the connection to your sub. The amp will be much most sable not bridging. Bridging the sub that you got will bring the impedance down to 2 ohm. Not a good idea since most amp is meant to be bridge at 4 ohm. If you want to get the most out of your amp. You can do this. Instead of running both of the sub, run a single sub at 4 ohm in bridge mode then you will fully maximize the power of your amp.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: Redstorm3
Date Posted: May 13, 2004 at 10:27 AM

so, if I hook it up like this: it would be the best bet? posted_image

Posted By: haemphyst
Date Posted: May 13, 2004 at 10:28 AM

Listen to Stevdart... 4+4=8, bridged to 8 ohms, your amp will see 4 ohms per channel... or run it stereo, with one woofer on each channel... It won't matter... same power, either way.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: Pola_Trucos
Date Posted: May 13, 2004 at 11:14 AM

I have a friend with 2 dvc 1ohm woofers. He want to wire them in a 2 ohm load stereo but he has a mono amp. Is that posible????

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Posted By: thepencil
Date Posted: May 13, 2004 at 11:57 AM

Yes, it is possible to wired them into a 2 ohm load, but not on a 2 ohm load stereo since a mono amp is just mono. All output will be in in a single channel.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: DYohn
Date Posted: May 13, 2004 at 11:58 AM

Pola_Trucos wrote:

I have a friend with 2 dvc 1ohm woofers. He want to wire them in a 2 ohm load stereo but he has a mono amp. Is that posible????

No, you cannot wire a mono amp in stereo. Mono means one. It only has one channel. Stereo requires two channels. Plus, you cannot wire 2 1-ohm DVC woofers as a 2-ohm total load. Your options are 0.25 ohms (all in parallel), 1 ohm (series-parallel), or 4 ohms (all in series).

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Posted By: Redstorm3
Date Posted: May 13, 2004 at 2:14 PM

last question, if i run my 2 subs parallel, I can only hook it to my amp on 1 channel? i know its a stupid question, but it's confusing me. I want to be 100% b4 i install

Posted By: DYohn
Date Posted: May 13, 2004 at 2:21 PM

No. Connect them as shown earlier in series as an 8-ohm load ontoyour amplifier bridged.

Your amp is rated at 230 watts X2 into 2-ohms. If you connect your speakers in parallel on one channel, this will deliver 230 watts to them, or 115 watts per speaker. Your amp is also rated at 150 watts X 2 into 4 ohms, which is teh same as 300 watts X 1 into 8 ohms. This will deliver 150 watts per speaker.

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Posted By: Redstorm3
Date Posted: May 13, 2004 at 2:28 PM

so, be clear, i can either run series on 1 channel or just hook up 1 sub per channel and it will put out the 150watts per speaker

Posted By: DYohn
Date Posted: May 13, 2004 at 2:41 PM

Redstorm3 wrote:

so, be clear, i can either run series on 1 channel or just hook up 1 sub per channel and it will put out the 150watts per speaker

No, not on one channel, but on BOTH channels BRIDGED. Do you have the owner's manual for the amp? It will show you how to do this. Or yes, simply connect each sub to its own channel on the amp.

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