Cone slap?

[EYEdROP0]

Hello all. My Velodyne DF-661 monitors are having a problem. Im hooked up to a 100wpc yamaha stereo receiver and playing music off my computer.

The problem is with moderate to high volumes and very bass heavy music it sounds like a sputter or clicking inside the woofer. It seems like its bottoming out pretty easily. My temporary bandage has been to set a high pass filer to around 90hz and adjusting my subwoofer acordingly. The problem decreases, but I still can only turn it up to a certain point.

Another problem is these drivers are dual voice coil, super rare, and I dont know if its fixable. Is there a simple solution to this? Can I send it to a reputable speaker builder? I contacted Velodyne some time ago, and all they said is buy another pair off ebay and switch the drivers, which I wont do.

Here is some pictures I found of the inside of the box, speakers, crossover, etc...: http://www.flickr.com/photos/vinerp/page3/

Go onto page 4 and 5 for more pics.

Can someone possibly help? Id also like to know if there is any simple mods I can do if I tear my stuff apart.

 

[MidnightSensi]

Is it distortion from just too much excursion? Is this a new problem or something the subwoofer has suffered from for a while?

90Hz is actually a fairly high crossover point. Set the crossover to 80Hz on your receiver and don't use the crossover on the subwoofer (turn it all the way up and allow the receiver to handle bass management).

 

[EYEdROP0]

Is it distortion from just too much excursion? Is this a new problem or something the subwoofer has suffered from for a while?

90Hz is actually a fairly high crossover point. Set the crossover to 80Hz on your receiver and don't use the crossover on the subwoofer (turn it all the way up and allow the receiver to handle bass management).

I have a very simple yamaha stereo receiver with no modern features, so I use software for the high pass filter. I think it might be from too much excursion. Its always done it since I had the speakers. But it shouldent be doing that at the volumes Im asking for.

 

[EYEdROP0]

Ok, so after some experimenting, I found out that the screws where the woofer goes effect the clicking sound. Its like its not mounting correct and effecting the excursion of the speaker. No matter how much I try, there is till a sputtering sound.

 

[TLS Guy]

Ok, so after some experimenting, I found out that the screws where the woofer goes effect the clicking sound. Its like its not mounting correct and effecting the excursion of the speaker. No matter how much I try, there is till a sputtering sound.

Have you tried these speakers with a source other than your computer, a CD player for instance? This sputtering sounds like a decoding error to me. Check your source before blaming the speakers.

 

[EYEdROP0]

I know for a fact its the speaker. The driver is attached to a frame that bolts onto the box itself. I think the problem is this frame is warped and the driver isnt moving straight.

 

[TLS Guy]

I know for a fact its the speaker. The driver is attached to a frame that bolts onto the box itself. I think the problem is this frame is warped and the driver isnt moving straight.

That was a weird driver, with two voice coils. It had what they called a counter coil, to reduce distortion. It all sounded highly questionable to me.

Any how unless Velodyne, will sell you a driver, or you can buy one from someone parting out, those speakers are history.

 

[EYEdROP0]

That was a weird driver, with two voice coils. It had what they called a counter coil, to reduce distortion. It all sounded highly questionable to me.

Any how unless Velodyne, will sell you a driver, or you can buy one from someone parting out, those speakers are history.

I already talked to Velodyne. They said the drivers are very rare and they cant re-manufacture. the thing is, I know the driver isnt blown. It still sounds great. I bet it could easily be fixed by getting a new gasket for the frame.