washdup Posted June 21, 2010 Author Report Share Posted June 21, 2010 I did not end up using the RCA's, but instead used the other "universal" connectors that came with the Basslink unit. The signal wires were run down the other side of the car, although they do all run together for a few feet near the BL. Pretty glaring possibility is the currently ungrounded remote switch-on lead. I will see if grounding that takes care of the dental-tool whine. Link to comment Share on other sites More sharing options...
Dave 54 Posted June 21, 2010 Report Share Posted June 21, 2010 A good point. It's always a good idea to keep power and RCA seperated Crosstalk from power into signal can be a problem with full range amp installs, but at subwoofer frequency's, it's not likely. Ground loops are a lot more common. I'd look that direction. ( And RCA's are made of coax cable, that makes'em Shielded.) Don't think mine are Link to comment Share on other sites More sharing options...
washdup Posted June 21, 2010 Author Report Share Posted June 21, 2010 BTW, the 40 amp fuse by the battery went up in smoke already once. Normal? Link to comment Share on other sites More sharing options...
Jaxx Posted June 21, 2010 Report Share Posted June 21, 2010 BTW, the 40 amp fuse by the battery went up in smoke already once. Normal? no... check for shorts. Link to comment Share on other sites More sharing options...
BEJinFBK Posted June 21, 2010 Report Share Posted June 21, 2010 Don't think mine are If you have an RCA cable, it's made of coax. Coax = coaxial. One inside of another. A center conducter surrounded by a shielding conductor. Link to comment Share on other sites More sharing options...
bdimag Posted June 22, 2010 Report Share Posted June 22, 2010 unless its twisted pair //edit: never mind i see his picture. didn't i just see a line level converter in the for sale section? but i guess you're past that point? Link to comment Share on other sites More sharing options...
washdup Posted July 6, 2010 Author Report Share Posted July 6, 2010 I grounded the little loose white wire from the eBay harness and re-grounded the main ground on the BassLink to a better area and even sanded the paint off the location first. Still whining. BEJ--when you said check for "ground loops" what did you mean? What further steps should I take to stop the whine? Link to comment Share on other sites More sharing options...
andyb5 Posted July 7, 2010 Report Share Posted July 7, 2010 Mitch, as far as my understanding goes, a ground loop occurs when you have multiple grounding points within the same circuit and that allows electrical current to enter the circuit at multiple points, creating "noise." Link to comment Share on other sites More sharing options...
BEJinFBK Posted July 8, 2010 Report Share Posted July 8, 2010 There are three common ways that engine noise gets into a stereo. Radiated - RF hash so strong that it gets into your audio. Usually spark plug noise.More of a series of pops thane a whine. Not Common. Power Line - With a full range amp, running power along with your signal lines can induce noise from the alternator. That's why separate runs are a good idea. With a sub amp, it can still happen, but not as bad. Not too common either... Ground Loops - The ground in a car varies. The farther away you get from the battery, the more resistance involved. Mix that up with differing sheet metal thickness, bad connections, rust, etc and you can get a volt or so of difference. Put and RCA cable between an amp grounded at the back and an HU grounded up front and you've created a current path that picks up alternator whine along the way. This happens a LOT! Does the noise go away when you disconnect the signal input? If it does, you've got a ground loop. That white wire at the adapter probably isn't helping things...Probably just one more unequal ground. Without digging through your car, all I can do it point you those directions. There are a pile of details that can make or break engine noise. Time to school thyself. Write back and tell us what ya find! Oh Yeah - If you REALLY wanna get a grip on noise problems, Check out these guys. They do a very good job with this stuff: http://www.davidnavone.com/ You'll find this at the bottom right of the page: CD-BOOK Troubleshooting 2005 by Autosound 2000 and Navone Engineering Link to comment Share on other sites More sharing options...
washdup Posted July 8, 2010 Author Report Share Posted July 8, 2010 Thanks BEJ. It did seem to get louder after I grounded the white wire coming off the harness by the HU. My signal and power runs are on opposite sides of the car, but obviously there is some convergence near the sub/amp. I'll try disconnecting the signal feed to see if the whine goes away, and will edumacate my self at the site you (and Andy by PM) suggested. Link to comment Share on other sites More sharing options...
andyb5 Posted July 8, 2010 Report Share Posted July 8, 2010 There are three common ways that engine noise gets into a stereo [.....] by Autosound 2000 and Navone Engineering +1 Took the words outta my mouth and did a better job explaining them too Link to comment Share on other sites More sharing options...
washdup Posted July 8, 2010 Author Report Share Posted July 8, 2010 The site is educational, and has lots of potential product solutions. Not being able to decide which suited by situation, I emailed an inquiry to David Navone about my system's symptoms and asking for a product recommendation. To my surprise, he basically told me to just get a different sub/amp setup. :monkey: Link to comment Share on other sites More sharing options...
BEJinFBK Posted July 9, 2010 Report Share Posted July 9, 2010 The site is educational, and has lots of potential product solutions. Not being able to decide which suited by situation, I emailed an inquiry to David Navone about my system's symptoms and asking for a product recommendation. To my surprise, he basically told me to just get a different sub/amp setup. He's been in this game for a looooong time. Could be there's some history with your gear... But hey - Still curious. What happens when you disconnect the input? Link to comment Share on other sites More sharing options...
washdup Posted July 9, 2010 Author Report Share Posted July 9, 2010 Surprise! When the signal inputs are disconnected from the sub/amp, the whine remains. In fact, there is no whine from the sub/amp when the inputs are connected. It's the only speaker that is clean. Good call, BEJ! Additional fun fact--There was no whine issue from the other speakers before installation of the sub/amp. Hey, this is fun! :huh: Link to comment Share on other sites More sharing options...
washdup Posted July 11, 2010 Author Report Share Posted July 11, 2010 So, I disconnected the ground off the eBay wiring harness. That took care of most of the very loud whine. Now the whine is very slight, and it only comes from the rear pillar speakers. I realize now, this is the original post-install whine I had assumed (wrongly) was coming out of the BL, that prompted me to try grounding the extra wire from the eBay harness. So I feel like I have wasted a bunch of time to get back to this point. The whine is tolerable, but I'm wondering why those rear speakers developed a whine after this install. Aside from the addition of the BL itself, there's also: (1) The BL is grounded to an existing ground bolt that I found around 16" under the left speaker back there. I'm not sure what was grounded to that bolt already, but they are sharing the bolt now. (2) I had cut the wires to the rear pillar speakers and used them as a signal feed for the BL at one point, but later resoldered those wires together and instead used the signal feed off the eBay wiring harness. As I recall, the wires for the pillar tweeters were indicated with a black stripe on the negative(?), so I don't think I messed up the polarity. I'm not sure if this is for anyone else's edification, but at least I'm learning from you all, and from the process of mistakes. By the way, aside from the slight whine (which you can't hear with music playing) my system sound great now. :) Link to comment Share on other sites More sharing options...
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