Hi @akaybee, Naida Paradise 90 UP BTE’s are indeed excellent aids for severe/profound loss, I also use, double walled tubing, gives me around, an extra 5db MPO, and I believe this helps with feedback? I had never heard of double walled tubing, until I was speaking to my A.uD last year, so I ordered a pack, every little helps Naida UP P90’s, are by some distance the best aids I have ever owned, closely followed by Naida M70’s SP BTE, a Super Power aid, for severe/profound loss, smaller and slimmer in overall size, with the 13 batteries, you may well like these, but REM is imperative, as it makes a big difference! I would say, my main reasons for liking Naida P90’s, in a nutshell, Clarity & Connectivity, the Bluetooth is excellent, I think you can pair, up to 8 simultaneous connections, and if you are an anorak/geek like me, then that is awesome…… But, as always, your HIS/A.uD is the single most important part of the equation, in order to get a good fit. Personally, I dabble in DIY, and I basically know enough to get reasonably good fit, and I know this works for me, but DIY is not for everyone! We all hear differently, and what works for you, may indeed not work for me, it is all about compromise, and reasonable expectations…… Try the Naida P90’s UP, or indeed the Naida M70/M90 SP, you may like either or you might like both? Good Luck, cheers Kev