Quote Originally Posted by GM View Post
Originally, there was a very noticeable sonic difference between the 416, 515 [no comparison to my ears], but I've read/heard that some later ones and GPA's are almost same-same sonically, but no personal experience to comment. Makes sense really, Altec consolidating parts as the company was being gutted and Bill winding up with the parts, tooling used at the end, so maybe the 'magic' is gone from the 515 with the trade-off being a better overall 416. FWIW, mine have enough HF 'sweetness' to XO them to super-tweeter horns at 5 kHz/2nd order! Can anyone do it with even a GPA 416 without a huge dip in the response and/or without obvious HF break-up modes 'shout'?
Probably can come pretty close, GM. In my GPA 416 thread, my measurements showed pretty flat response out to about 3900 Hz. They definitely have some range on them! I'd love to hear a refurbed Model 19 with the new GPA 416s loaded, and the crossovers modified for the new woofer. I would bet they sound fantastic. Sorry if this is a derail of your thread Hemi!