I emailed definitive about upgrading the BP10s to the BP10bs and here was the reply:
Thanks for your recent email to Definitive Technology. The original BP10s used two 1" soft dome tweeters, whereas the BP10Bs use two 1" aluminum dome tweeters. The newer BP10Bs produce a subtle improvement in detail and clarity.
In order to upgrade your BP10s to the same level of performance of the BP10Bs, you really would need to replace the tweeters as well as the crossover networks. The crossover networks in your BP10s won't properly blend the new aluminum dome tweeters to the 6.5" bass/midrange drivers. (You could actually keep your 6.5" drivers. The performance of the newer 6.5" drivers and the older 6.5" drivers is very similar.)
Honestly, the difference in sound quality between the BP10s and BP10Bs is fairly subtle. Since the cost of each tweeter is $60.00 and each crossover network is $100.00, it would be hard for me to recommend paying $440.00 for this upgrade.
If you need any other information, please email me at
cpelkowski@definitivetech.com.
Thanks Again,
Chet Pelkowski
Definitive Technology