actually yeah ill get some obsidians or sa-15's basically same sub haha id be good running my amp at 2 ohms, be a little easier on my electrical i think
I've posted this a few times on other forums but I suppose it doesn't hurt to outline the differences between the drivers again.
There are a few items that the Obsidianís share with the SAís, but a short list of what is different between the two drivers is as follows:
Top plate OD
Top plate ID
Top plate thickness
VC cooling method
VC winding width (winding height)
VC OD (both D2 and D4 are different from the SA)
VC former vents
Thermal power handling (SA has the advantage)
On the TL the SA's are between 0.5 dB and 1 dB louder
F3 in specified enclosure sizes and types (OA's play a smidge lower - in Klippel testing the Fs on the Obsidian's is a little lower and Cms is slightly higher, which is indicative of more LFE with all other factors remaining the same)
Both drivers do use a Nomex spider, flat sewn-on leads, and a triple joint reinforcement advantage.