[ICOM] Roofing Filters Question

[Skip Cameron]

I have an IC775DSP with 455khz and 9mhz IF's.
I have the stock IF filters, which are 500hz for CW and 2400hz for SSB.
On CW I can select wither the 2.4 or the 500, and I can also engage DSP which really narrows the CW,
down to about 50hz.
For contests and split Dxing, the DSP 50 hz is too narrow on CW, 500 hz works pretty good, and the
2.4 is too wide on SSB, with lots of other strong signals interfering.
I have been considering INRAD roofing filters, 400cw and 2100SSB.
Would I need them in both 455 and 9 IF's?
If I just wanted one, not both, which would be best?
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