AKG d200e no bass under 300hz

[AardvarkBry]

I just bought 2 AKG d200e mics. One of them works and sounds fantastic. The second one sounds like you’re singing into a telephone. There’s a dramatic bass roll off. It’s like you put a high pass filter all the way at the 300hz range. I figure since it’s a 2 way, one of them has failed. Does anyone know what it would take to repair this, or do you think it’s some kind of capsule failure, and it’s not worth the investment?

 

[Erik2345]

Open it.
Then you know what you are up against.
Could be just a wire that snapped.

 

[dmp]

Maybe you've already seen this: http://www.coutant.org/akgd200e/
The tech sheets at the bottom show exploded views of the mic.
Usually, a capsule without low end means there is a problem with the capsule. But in the case of this mic, it has two dynamic capsules ,one for high and one for low frequency. So the place to look is at the low frequency capsule, which is mounted below the top capsule, and how the low and high frequency capsules are connected together.

 

[AardvarkBry]

Wow, thank you, I have not seen this. I knew about the two way capsule, but this is great info!

 

[AardvarkBry]

It’s hard to tell how to take the top off this mic. Do I have to take the black label band off to access the screws?

 

[AardvarkBry]

Never mind, I just saw that last drawing on that link. Screws are under the band.

 

[dmp]

Sometimes if you are careful taking the label off you can reapply the label. Or if you can feel where the screws are under the label, you may prefer to just cut access circles over the screws and leave the rest of the label in place. I've never had this particular mic though so I am just going off past experience trying to dissassemble / repair mics.
Once you have the top off, it still looks like you have to take off the XLR at the bottom and unscrew a nut that holds the capsule assembly in (#9 in the drawing). Then it may all just lift out?

 

[Hibernate Audio]

Hi there, did you ever have any luck fixing your mic? I have the same, but opposite problem... all low frequency, no high frequency. Super boomy and phase-y sounding. I think my HF capsule or some part of the crossover is shot. It looks like my voice coil wires are intact.

Besides reflowing the large solder joints and cleaning the diaphragm of all the deteriorated foam particles, I'm not sure where else to look.

Any thoughts?