others have reported exceptional experiences with these: check the archives dude
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They're certainly worth trying, with no risk. As with all Walker Audio products, if they don't work for you, return them in original condition within 30-days and Walker Audio will refund your purchase price.
If you call Lloyd, he'll tell you directly what his customers' experiences with hybrid stats have been.
I never had much luck with these on My Eros Mk 3. I did have great results with them on some other dynamic speakers I used them with though. Just didn't seem to do much of anything on my Eros, so I took them off. It always seemed to me that these don't do as much on a system that has lots of power conditioning and power cords, just an observation.
I had both the Hi-Def links and Ultimate Hi-Def links, and while they both worked very well to my ears, I recently discovered Argent Audio BOBs, which, to my ears at least, add a little more realism and detail to the sound than the Walkers. And they're significantly cheaper than the Ultimate Hi-Defs. And not as fragile. Like the Walkers, they don't work in every system, but Argent offers a 30-day warranty. Argent's phone number is (785) 331-4123. I'm in no way affiliated with the company--just a very happy customer.
Walker HDL and Ultimate HDL both worked wonders on my Sound-Lab U-1's. After I switched to Dali Megaline the difference was slight, but still worthwhile.
I have the BOB modules here too. I tried them only on my Dali's as Sound-Labs had been sold before BOB's arrived. The BOB's did not work with the Dali, unknown what they might have done for U-1's.