[Elecraft] Question about using external DPS audio filter with K2

[dw]

Hi All,
I have an opportunity to pickup a Timewave 599 audio filter to use with
my K2.
>From what I understand, audio filters like the Timewave units are really
good at reducing cyclical noises, but not simply to reduce general
noise-floor levels. 
I'm wondering if it would be a waste of money for the attempt at simply
reducing noise-floor, for CW on the lower bands.
I have the KDSP2 DSP filter, but prefer the more natural sound of the
KAF2 analog CW filter.
Anyone have any past experience using the Timewave filters with a K2?
Sincere thanks
Duane
-- 
 Bw_dw at fastmail.net