Noisy 6105's

I bought 4 6105's to replace my noisy mp40's and these are twice as loud. Is there a breakin period to these ?

They've only been running for 24 hrs. and it's all four pumps making the same humming with a click, click about every minute.

These are all connected to a 7096

When I change the % of power I can here them change speed but the humming continues.

It's like a bad dream when there in interval HUMMMMMMM click HUMMMMMMM HUMMMMMM click HUMMMMMMMM

Does this go away?
 
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