need help figuring out power of amp!?

Mac6135 · 05-13-2005, 12:19 PM

I bought a sub from a friend and he gave me an amp for free. I already have an amp so I am not using this one, but I thought I might stick it in the boat or something. Except I dont know the power of it and I cant find it anywhere online.
Its a Kingwood (NOT kenwood, yea Kingwood, never heard of it). Model number: KWR-600. 4-Channel, 2-ohm/4 ohm stable, 15A fuse. Ive looked everywhere to find the wattage, but cant find it. Can anyone help?

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4-RUNNIN' FREAK · 05-15-2005, 03:11 AM

600 in the model number may point to 600 watts peak to 4 channels.
Divide that by 4 for the 4 channels and that is 150 max per channel.
Now divide that by two because the RMS is usually half of the max.
That is for a 4 ohm load. In 2 ohms you can get 150x2 channels.

I notice on lesser amps they rate them at max power to make them sell.

I can be wrong, but it may be a little more or a little less.

Correct me if I am wrong.

My Alpine can push out 170 watts RMS and is rated for 125 per channel RMS.

Metal Wulf · 05-15-2005, 09:35 AM

it's probably a little less as it's only got a 15amp fuse.

It's probably 50watts per channel

Gangus2006 · 05-16-2005, 03:13 PM

Well, seeing that its a 15A fuse:
15A x 12V = 180W (peak)
180W / 4 Channels = 45W (Peak)
45W / 2 = 22.5W (RMS)

probably less due to inefficiencies in the amp, so figure around 15-20WRMS x4 @ 4ohm

I put in a 50x4 (16-18Wx4) head unit, and it had a 15A fuse...

4-RUNNIN' FREAK · 05-16-2005, 04:09 PM

Who knows if it's the right sized fuse.

I know people who run a lesser amp fue just for added protection.

I also know people who run without fuses cause they think it robs them of power.

I would just like to hear about a fire one day so I can say "I told ya so".

05-15-2005, 03:11 AM	#2 (permalink)
4-RUNNIN' FREAK Contributing Member Join Date: Jun 2004 Location: NNJ Posts: 3,951	600 in the model number may point to 600 watts peak to 4 channels. Divide that by 4 for the 4 channels and that is 150 max per channel. Now divide that by two because the RMS is usually half of the max. That is for a 4 ohm load. In 2 ohms you can get 150x2 channels. I notice on lesser amps they rate them at max power to make them sell. I can be wrong, but it may be a little more or a little less. Correct me if I am wrong. My Alpine can push out 170 watts RMS and is rated for 125 per channel RMS. __________________ '02 4Runner - '06 XRunner Breakdancing www.BadgeYourRide.com Check this out Multi-Touch Interaction Research http://mrl.nyu.edu/~jhan/ftirtouch/ Highest Xmax 6.5" subwoofer made Total Posts: 32,218 (75.35 posts per day) [/center] [/color] Still A Neon

05-15-2005, 09:35 AM	#3 (permalink)
Metal Wulf Registered User Join Date: Mar 2005 Location: Bridgeton, NJ Posts: 24	it's probably a little less as it's only got a 15amp fuse. It's probably 50watts per channel __________________ '89 4x4 Pickup SR5 Stock for now... RIP... '89 4x4 SR5 4" Trailmaster lift w/ 33" BFG MTs Last edited by Metal Wulf; 05-15-2005 at 09:36 AM.

05-16-2005, 03:13 PM	#4 (permalink)
Gangus2006 Banned Join Date: Oct 2004 Location: Fitchburg, MA Posts: 1,110	Well, seeing that its a 15A fuse: 15A x 12V = 180W (peak) 180W / 4 Channels = 45W (Peak) 45W / 2 = 22.5W (RMS) probably less due to inefficiencies in the amp, so figure around 15-20WRMS x4 @ 4ohm I put in a 50x4 (16-18Wx4) head unit, and it had a 15A fuse... Last edited by Gangus2006; 05-16-2005 at 03:15 PM.

05-16-2005, 04:09 PM	#5 (permalink)
4-RUNNIN' FREAK Contributing Member Join Date: Jun 2004 Location: NNJ Posts: 3,951	Who knows if it's the right sized fuse. I know people who run a lesser amp fue just for added protection. I also know people who run without fuses cause they think it robs them of power. I would just like to hear about a fire one day so I can say "I told ya so". __________________ '02 4Runner - '06 XRunner Breakdancing www.BadgeYourRide.com Check this out Multi-Touch Interaction Research http://mrl.nyu.edu/~jhan/ftirtouch/ Highest Xmax 6.5" subwoofer made Total Posts: 32,218 (75.35 posts per day) [/center] [/color] Still A Neon

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