Westend --at the risk of sounding (more) ignorant--what is a CD upgrade--not sure what the abbreviation CD stands for in this case? Also, I'm not interested in using an active crossover--I don't have the know-how or measuring equipment to implement it with confidence and I'd rather use something that already has all the necessary adjustments made for me.

Old Guy--thanks for the detailed response. I agree the Valencia crossover leaves much to be desired, I suppose it makes no sense to shell out over $400 for two GPA 902 drivers (or used Altec 802 or 902 drivers) and subject them to the old Valencia crossover. The Heathkit AS-101 crossover that I have in my Heathkit AS 101's, however, is a better crossover than the Valencia--not to mention that with the help of some of you guys on this forum (and Zilch from another forum), I recapped my Heathkit crossovers last year and they sound better than ever. Do you or does anyone out there think that the Heathkit AS-101 crossover (800 hz) would work well with the GPA 902 drivers and 416-8A woofers?

My other option is to wait until GPA offers a Model 19 crossover -- I have a feeling that it's in the works (see quote below). If they do offer a Model 19 crossover I would buy four of them and four 902 drivers and upgrade both my Valencias and my Heathkit AS 101's. I'll bet there's lots of others out there that would be interested in doing this upgrade if they could buy GPA Model 19 crossovers--and many people that would love to build "new" Model 19's with the GPA 902 and 416-8c if they could buy a GPA Model 19 crossover. My Valencias are the 16 ohm version--I know GPA offers both an 8 ohm version and a 16 ohm version of the 902 driver. I'm hoping if they offer a model 19 crossover for this type of upgrade that they will offer both an 8 ohm version to go with the 8 ohm 902 that they sell (I'd use these for my AS-101's), and a 16 ohm version of the Model 19 crossover to go with the 16 ohm 902 that they sell (for my Valencias). My Valencias and AS 101's sound great the way they are now--so I'm in no major hurry and I'm not even considering scouring the internet for a used pair of Model 19 crossovers--I've heard horror stories about people "parting out" Model 19 crossovers because they've been "pushed" (partially fried) with too much power....
Also, I've heard that the "new" Iconic Model 19 crossovers are really expensive--I'd rather wait for the GPA version if it is in the works (especially since I've done business with GPA before and was very impressed by them)--does anyone (Todd maybe?) know if GPA is going to offer Model 19 crossovers?

Quote Originally Posted by Todd W. White View Post
Iconic has their own methods of utilizing those parts, and builds their version of the Model 19 crossover themselves, by hand, on a per-order basis. Reports are that they work well, but they are expensive. As far as I know, Iconic has slowed down their marketing efforts, while GPA has and is increasing it's marketing efforts, and has and is introducing new products, crossovers, and complete systems.