Jkaiser3

Hi, I’m a little late to the party on this discussion. But i have had success in taming the exaggerated highs, dip in the midrange and sloppy bass of the rp 600 with an upgrade kit from Danny Ritchie at GR research. The kit includes sonicap caps, air core inductors, and i splurged for mills resistors of the same spec in the kit. I took this upgrade a step further and used non hardening clay on the driver basket and back of the tweeter horn frame. I also used no rez for the lightly braced cabinet, which is by no means sturdy stock. Lastly i used Dynomat to line the binding post cup and bass port, further dreading resonances. I haven’t listening since installing my mills resistors. But i can say i am increasingly pleased. These things have soul! Now With the crossover upgrade and bass driver dampening, these speakers have excellent mids, something this speaker never was a used of stock. Awesome detail instrument seperation and that sort of holographic floating soundstage. Most importantly i think for you, is that sonic is glassy smooth and balanced, no more shrill highs that measure elevated compared to the mids and bass. Very pleasing and clean highs with the upgrade. No longer a show off speaker but a truth telling speaker. Bass is way tighter cleaner plays lower and with more authority. All around took this speaker to another level in every way. I can’t even describe how much better its off axis listening is. It took it from a speaker that sounded like a 500 dollar speaker to a speaker that can compete with competition in the 1000-2000 price point. There are a plethora of you tube videos of the upgrade and listening demos before and after you can check out, at GR research and new record day. Cheers