is a relay what i need? 2 amps, pwr wire
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=105745
Printed Date: May 28, 2024 at 7:56 PM
Topic: is a relay what i need? 2 amps, pwr wire
Posted By: tcwave
Subject: is a relay what i need? 2 amps, pwr wire
Date Posted: June 27, 2008 at 7:50 PM
Hi Guys, I am running 2 amps,. a 300w and a 400w. Individually, i can get each amp to run great. When both hooked up, my 400w amp powering my side speakers fades in and out of power. I traced the problem back to the pwr wire coming from my Head unit (kenwood) When it is wired diredtly to the 400w amp, there is no issue. When the 300w is also attached, it begins fading. Is a relay going to solve this? If so, can you let me know what type/size? I have no experience with relays but am trying to do some research now. i appreciate your help. Thanks, TC
Replies:
Posted By: i am an idiot
Date Posted: June 27, 2008 at 8:10 PM
Do you have the power wires of the amps connected to the battery? Have you used a meter to verify that the voltage is dropping on the Blue/White wire of your radio? This is the wire that should be connected to the remote terminal of your amps.
Posted By: tcwave
Date Posted: June 27, 2008 at 8:19 PM
Yeah, everything works great when the blue/white wire off my radio is only connected to one amp. Soon as I put two amps on it, the 400w starts fading out. I haven't tried a meter only cause I didn't have it with me at the time. But given that keeping everything else the same except for when I move that wire, I am fairly certin its it. As for the way I am connecting the 3 wires. I have tried two methods. First was to wrap to together in a spiral then put them in a red crimp, then but the 3rd wire in the other side and crimp it. The second method was to just wrap all three wires together. i tried to keep them long and then braid them together, then wrap them in a spiral. i appreciate your help. Tc
Posted By: jar754
Date Posted: June 27, 2008 at 8:38 PM
i hope your not running your power of the headunit. your power should be ran directly to the battery with an inline fuse within 12" of the battery, and your remote turn on wires go to the headunit, these you can run from hu to 1 amp and daisy it over to the 2nd
Posted By: i am an idiot
Date Posted: June 27, 2008 at 8:54 PM
i am an idiot wrote:
Do you have the power wires of the amps connected to the battery?
Posted By: tcwave
Date Posted: June 27, 2008 at 8:57 PM
right. my power is 4 guage from battery to a distribution block that brings it down to two 8 guages wires going to the amps. I have a fuse 6" from my battery. It's my remote turn on wire from my Headunit that is causing the issue. In the headunit manual, it's they refer to it as the "external amp control wire". when that is directly connect to either amp, everything works and sounds good. (except on one amp is powered up of course). when that wire is connected to both amps, the 400w fades in and out. The red light on the outside of the amp actually gets dimmer then flickers then comes back on, repeat. -Tc
Posted By: i am an idiot
Date Posted: June 27, 2008 at 9:17 PM
Posted By: jar754
Date Posted: June 27, 2008 at 9:37 PM
what model # hu do u have
Posted By: tcwave
Date Posted: June 27, 2008 at 9:39 PM
Nice...Thanks "i am an idiot"....you have helped me out alot lately and I really appreciate it. I am pumping my boat out and it's coming together well. If you ever want to go tuna fishing in MA, just let me know.
Posted By: tcwave
Date Posted: June 27, 2008 at 9:40 PM
Kenwood KTS-300MR. It's a marine radio.
Posted By: i am an idiot
Date Posted: June 27, 2008 at 10:01 PM
It seems as though the forum won't let you plmp your boat out. Hey thanks for the invite, swing around to the Gulf of Mexico and pick me up.
Posted By: jar754
Date Posted: June 27, 2008 at 10:07 PM
the pink/black wire should be your remote turn on, and the blue/white goes to your antenna
Posted By: tcwave
Date Posted: June 27, 2008 at 10:10 PM
jar754, your right. I posted blue white, but i was wrong. I am using the pink/black wire for the remote turn on. sorry for this mistake. my buddy was telling me how if I use the antenna wire, the power would shut off ever time a cd was played (becuase the antena would power down. funny)
Posted By: i am an idiot
Date Posted: June 27, 2008 at 10:22 PM
The Blue/White wire is the amp remote turn on wire. The antenna control wire is blue. The pink/black wire is a digital control wire that will actually allow the deck to control certain features on some of their amplifiers. Use the Blue/White wire without the relay. Your deck should have no problem turning on 2 amplifiers.
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Posted By: jar754
Date Posted: June 27, 2008 at 11:28 PM
blue is not used
Posted By: i am an idiot
Date Posted: June 27, 2008 at 11:36 PM
I guess they don't think you would have a power antenna on a boat.
Posted By: jar754
Date Posted: June 28, 2008 at 12:00 AM
blue/white is used for this
Posted By: tcwave
Date Posted: June 28, 2008 at 3:12 PM
You guys are awesome. Thanks. It worked. I used the blue/white now everything is cool. Thanks again for helping me out. TC
Posted By: i am an idiot
Date Posted: June 28, 2008 at 6:11 PM
So the Pink/Black wire wasn't cutting it?
Posted By: tcwave
Date Posted: June 29, 2008 at 10:27 AM
Yes..blue/white worked.
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