Tweeter Wiring Touching Back of Woofer

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David Carter · #1 Post by **David Carter** » Tue Jan 15, 2008 6:00 am

Just got finished mounting the woofer in my first DR250, and now I'm working on inserting the melded tweeter array. The plastic sheathing on some of the wiring on the melded array is touching the back of the woofer. Is this OK, or is there a danger of melting the plastic sheathing?

Thanks.

DAVID_L_PERRY · #2 Post by **DAVID_L_PERRY** » Tue Jan 15, 2008 7:11 am

It will probably not do much against a Neo heatsink but I would use some zip ties to pull the cable in tighter to the melded array assembly and give yourself a little space.

Dave

LelandCrooks · #3 Post by **LelandCrooks** » Tue Jan 15, 2008 7:19 am

Cover the back side of those tweeters close to the driver with something very thin and non conductive. Voice of experience.

David Carter · #4 Post by **David Carter** » Tue Jan 15, 2008 7:24 am

LelandCrooks wrote:Cover the back side of those tweeters close to the driver with something very thin and non conductive. Voice of experience.

Any recommendations? Are we talking about just sliding a thin piece of cardboard in between or what?

Tim A · #5 Post by **Tim A** » Tue Jan 15, 2008 7:53 am

Electrical tape over the contacts.

DAVID_L_PERRY · #6 Post by **DAVID_L_PERRY** » Tue Jan 15, 2008 8:01 am

I think its just the cable, not the metal solder tags that he is concerned about.
David, perhaps you can clarify that ?

Sliding anything loose over the rear of the magnet could block the air passage of the magnet. Thats not a good idea, pull the cables back using zip ties if you can and don't have the concern of blocking the vent.

Dave

Tim A · #7 Post by **Tim A** » Tue Jan 15, 2008 8:16 am

David Carter · #8 Post by **David Carter** » Tue Jan 15, 2008 8:30 am

OK. Here are a couple of images of what I have:

As you can see, the wire leads alternate between bending inward toward the center of the array and bending outward toward the edge of the array. The ones that bend inward also tend to protrude backward beyond the back of the array itself. These are the wires that were coming in contact with the woofer. I have since bent the the offending wires down and hot glued them to the back of the array so they no longer touch. This is reflected in the pic on the right (the close-up).

Maybe I misunderstood, but I was reading more into Leland's recommendation to put a non-conductive barrier between the array and the woofer than simply to avoid physical contact. Is there any electromagnetic interference that will take place if I don't take steps to shield the wires on the back of the array? Should I go ahead and cover the contact points with hot melt glue even though there is no longer any contact with the woofer?

Hope this clarifies my situation. I'm looking forward to getting the array installed correctly the first time so I don't have to keep ripping it out trying to correct oversights or stupid mistakes.

Thanks.

Tim A · #9 Post by **Tim A** » Tue Jan 15, 2008 8:34 am

You should be all set!

David Carter · #10 Post by **David Carter** » Tue Jan 15, 2008 8:37 am

Tim Ard wrote:You should be all set!

Great! That's what I like to hear!

Tue Jan 15, 2008 8:43 am

I'd use a few layers of electrical tape on the back of the array in the area where it comes close to the woofer magnet to insulate the tabs and connections.

David Carter · #12 Post by **David Carter** » Tue Jan 15, 2008 8:50 am

Bill Fitzmaurice wrote:I'd use a few layers of electrical tape on the back of the array in the area where it comes close to the woofer magnet to insulate the tabs and connections.

Thanks, Bill. I'll do that.

SoundInMotionDJ · Tue Jan 15, 2008 12:39 pm

Skip the tape. Paint some rubber cement on all the contacts after you solder and test the array. It takes a fraction of the time that taping will, and it's more durable. It is a pain in the butt to remove.

We use to "float" or "flood" circuit boards in rubber cement in college whenever we had to do electrical projects that had to survive in a hostile environment...everything from vibration, to humidity, to dust, to immersion.

--Stan Graves

David Carter · #14 Post by **David Carter** » Tue Jan 15, 2008 12:55 pm

SoundInMotionDJ wrote:Skip the tape. Paint some rubber cement on all the contacts after you solder and test the array. It takes a fraction of the time that taping will, and it's more durable. It is a pain in the butt to remove.

Sounds a lot easier, but I'll definitely need to test thoroughly first. Thanks.

LelandCrooks · #15 Post by **LelandCrooks** » Tue Jan 15, 2008 1:23 pm

SoundInMotionDJ wrote:Skip the tape. Paint some rubber cement on all the contacts after you solder and test the array. It takes a fraction of the time that taping will, and it's more durable. It is a pain in the butt to remove.

We use to "float" or "flood" circuit boards in rubber cement in college whenever we had to do electrical projects that had to survive in a hostile environment...everything from vibration, to humidity, to dust, to immersion.

--Stan Graves

So that's what that crap is that makes my scissor lift control boards so frickin hard to work on.

You ain't kiddin it's pita.