Hello All - First post...

Years ago, I purchased 2 - 2461 CDs for a project. I was essentially building an SR4725 clone which consists of 2226H bass driver, 2426H CD and 2307A Horn (plus x-over). As you may know, these are PA units, but I figured I could also use them for the odd casual listening sessions with the guys at the cottage as well. (We've been JBL fans for 40 years...) Long story short, I had the bass driver and horn, but couldn't come up with the 2426s (or 2425s) at the time and eventually found the 2461s. They were "J" models (16 ohms), but someone told me all I had to do was change the diaphragm to the 2425H phragm (DR82425) and they would become 8 ohm drivers - OK.

At the time though, I didn't realize that the 2461 was actually an upper mid CD, with response limited to around 12K. And to be honest, we never heard any lack of top end out of these monitors and we've been using them for years. I've heard anecdotally, that changing the diaphragm in a CD like the 2461 to a 2425 diaphragm, the CD will produce the same frequency response as a 2425. ie. up to around 20K.

Can someone confirm or deny this for me? I currently want to use the 2461s in another project and am curious to know what freq response they actually have using the 2425 phragms. (Sorry about the long post, but wanted to explain the whole story...)

Thanks guys,