Efficiency becomes an important parameter when you start talking about high output applications. The overall output capabilities of the driver are dominated by efficiency. Personally, I think it's a pretty big deal, particularly in midrange and midbass applications where output limitations are often very real (partly due to their unique position of trying to achieve high frequency extension while still trying to move some air).Whiterabbit said:given the fact that many DIY enthusiasts tend to change power output to each driver (like buying a 50 watt amp for the tweeters and a 350 watt amp for midbass drivers), and that the DIY enthusiasts tent to have advanced signal processors that allow for tuning individual gain between each drivers for the purpose of output matching, Ive never really concerned myself much with efficiency.
Dont get me wrong, I always check it and keep it in mind. just in case. But I see it as a qualitative spec rather than quantitative, and until I run or install a passive stage ill never use efficiency as a "deal breaker" when picking drivers.
so I CERTAINLY dont see 8 ohm drivers as a dealbreaker either! if the other performance specs fit my app, its the driver for me!