Custom-aged Replacement Tweeter for NS-10M The Avantone Pro AV10-MHF Aged is a faithful re-creation of the original Yamaha NS-10M high-frequency driver, treated with a custom aging process for authentic vintage sound. Ever since Yamaha discontinued the NS-10M, aftermarket components have become less available and more expensive. Further, the drivers in the field are rapidly deteriorating due to years of in-studio use, making buying used components a risky proposition. If you have consigned a pair of these iconic speakers to your closet due to blown tweeters, the AV10-MHF Aged is the perfect solution. It's a direct, drop-in replacement, and thanks to Avantone Pro's custom-aging process, you won't need to break this tweeter in to make it sound right. Rather, the AV10-MHF Aged will sound correct the day you install it — and it will maintain this voicing over time. Here at GearNuts, we've also found the AV10-MHF Aged to be a