Need Info on older 6.2 main woofer speaker

[Flister]

The main speaker, 8 in woofer in my old Bose 6.2 system has a blown voice coil.  I need to know the frequency specs of that speaker so I can order one from a store, seller, online.  I do know the 2 tweeters work just fine and have checked out the 8 inch speaker out of the cabinet on another system and I definetly know the voice coil is bad. 

The info I need is: EXAMPLE

Frequency 50HZ TO 5KHZ or whatever the specs are.

I was unable to get any info from Bose because they tell me that is an engineering question and I can't have contact with them via phone or e-mail.

Thanks for any info you can supply