AVS Forum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
1,829 Posts
Discussion Starter · #1 ·
Need some help. I am getting a sudden distortion peak around 470hz. As I bring up the volume, its suddenly there. Its not there at any lower SPL, and is ever-present at higher. I dont see it in the other speaker.

Things ive tried:

1) Changed amp channels driving the speaker
2) Made sure all the mounting screws are tight
3) Tested both near field and far field.
4) Eliminated anything that could vibrate near the speaker

The graphs were taken near field (about 10" from cone).

Has anyone seen this type of thing before? Ideas?

Text Map Line Plot Diagram


Text Plot Line Diagram Design
 

·
Registered
Joined
·
2,381 Posts
What speaker is this?

Looks like it is something buzzing/vibrating at that frequency. A spike like that in all the harmonics is a tell tale sign. If you run a slower sweep can you hear it? Should be pretty obvious. It could be something like a loose crossover rattling inside the cabinet or the wiring.
 

·
Registered
Joined
·
1,829 Posts
Discussion Starter · #3 ·
What speaker is this?

Looks like it is something buzzing/vibrating at that frequency. A spike like that in all the harmonics is a tell tale sign. If you run a slower sweep can you hear it? Should be pretty obvious. It could be something like a loose crossover rattling inside the cabinet or the wiring.
Speaker = http://www.troelsgravesen.dk/Jenzen-NEXT.htm

I'll continue to look for something vibrating. Can we rule out the driver itself as the cause based on the data provided?
 
1 - 4 of 4 Posts
Top