Quote:
SteveCallas wrote:
 The rated sensitivities may be similar, but in the same size enclosures, the Avalanche 18 will produce more output with less power. With my enclosure, tuning, and desire to stay amp limited, I wanted 600 watts into 4 ohms. I found it in the Carvin hd1800. Realistically, I'm probably rarely pushing more than 50 watts. The LMS with 6000 watts wouldn't fit the amp limited criteria - 2000 watts is all you'd want. |
Willy, Steve, thanks for the responses. Steve, I'm still trying to understand your "amp-limited" concept as you conceive it. How are you determining amp size for a particular application to make it properly amp limited? Also, I'm trying to understand exactly what the limiting factor would be in this case to keep the power at no more than 2000W. WinISD shows me that at that power level in a 19 cu ft enclosure tuned to 12 hz (using the 18" LMS), we're only using 38mm of the driver's 76mm p-to-p Xmax (above tuning). Clearly the driver's not close to excursion limits at 2000W input. It also is rated to handle much more than this thermally (8000W dynamic). The only issue I can think of is how quickly the driver gets to Xmax below tuning. At 2000W, the model shows the driver hitting excursion limits about 8.8hz. At 3200, it hits at about 9.7. I can't see either of these being a real problem, would you agree? Now, obviously modeling a sub can be somewhat different than real life performance, but where am I going wrong in thinking a sub like this could easily take 3200W? It would seem at that level it's only working the driver at about half its capabilities. It would be pushing an 8" port pretty hard, though, at 56m/s air velocity.
As a quick comparison, TC-Sounds themselves now offer a
PR sub design using the 15" LMS 5400 (not tuned or sized like an LLT, though, I believe) which they match with a 3200W amp.