From what I understand the only dif b/w the amps supplied with the ULD 15 and 18 is that they were tweaked differently so as to operate optimally with the respective driver. Mine does work with the 15 amp but it would be nice to have it closer to perfect. For that matter it was said that each amp was individually tweaked to perform best the the specific specimen of each driver it was paired with...don't know how much that mattered though.
The biggest thing for me would probably be the ability to change the xo point. 85Hz is just too high for me. I currently favor my Infinity SSW210 most of the time because I can adjust the xo point to blend more seemlessly with my speakers. I use my system for music. Don't really care about how explosions in movies sound at all.
The one on ebay was a series II -- not compatible with series I unless there is a way to convert the amp to work with series I (hence my question).
The biggest thing for me would probably be the ability to change the xo point. 85Hz is just too high for me. I currently favor my Infinity SSW210 most of the time because I can adjust the xo point to blend more seemlessly with my speakers. I use my system for music. Don't really care about how explosions in movies sound at all.
The one on ebay was a series II -- not compatible with series I unless there is a way to convert the amp to work with series I (hence my question).