Does anyone know:

1--Are these two the same horn?

2--Where I can find information about the 2381, if they are different.

3--Will 2380 series BRFF preemphasis work with the 2352?

4--Why JBL specifies the 2352 for its 2447 and 2451 but uses the 2381 in many of its SR series speakers?

Thanks

David