Thanks Bill for the clarification - I thought the 250 might also enhance the bottom end as well, clearly it's great for creating sparkle on older recordings that might have some missing high end - but could wreak havoc with a lot of newer material that has been smashed in the studio.
I used to have an old Compellor 320A in our airchain but it was pumping too much on modern (smashed) material (I think also the fact that it's in bad need of recapping may have had also increased the muddyness over a new unit)
Now I use a DSPX in DR mode (heavy AGC+ Lookahead Limiting but no clipping) at the studio with a Cutting Edge Unity AM box at the TX - surprisingly competitive as both units tend to work together to increase density while still letting through some nice punch and high end. I don't really think I can better this combination until the AM version of the DSPXtra is released.
Like all of Franks older boxes (pre Turbo), the Unity AM loves having consistent levels from the DSPX and really shines. It's still crushing the audio quite heavily but the Wideband AGC is showing minimal activity. I guess the DSPX's 4 band AGC is creating an effect like an Audio Prism on steroids!
Cheers,
Matt