[Elecraft] Use of a LP filter necessary with a KPA500?

[vtnn43e at comcast.net]

Just finished my KPA500 and was wondering if I need to use a low-pass filter on the out put? In the manual for the am p I noted there is a LP filter for each frequency band. 

I have a Bencher YA-1 LP filter , a nd yes I know that it cuts off at 29.7MHz. 

BTW the amp is going to be used with a SteppIR BigIR vertical and a Flex-5000a. 

Zack 

N8FNR