This is your best bet. Alpine used to have a good archive of manuals, but I tried searching it the other day, it did not seem to have much for the older gear. I see no reason why the specs given in Bassbox would not be accurate. Good luck.You could always just email Alpine. They might be able to help.
Hi,It looks like you have definitely found what I am looking for.It definitely pays to hold onto everything.Can you please take a dark photocopy of all the pages of the information on the alpine 6012 EX subwoofer so you can see all the details clearly, and send them to me.I would definitely like a personal copy of them for myself.I do not have a printer.I would even like the front and back cover.Just photo copy everything.I will definitely pay you in advance for them to have them shipped to me.You can send a paypal pay page for the total amount shipped, to my email, and I will promptly pay you.You can send me a private email and I will give you my private email address to send the paypal pay page, and give you my full address to send the photocopies of the alpine 6012EX specifications to.You can send them as cheap as possible since I won,t be doing the subwoofer install till spring time.If you could just fold them up in a letter or an envelope, or whatever will work best for you,that would be great.I have waited a long time for these so I am very grateful for you to have taken the time out for me on your busy schedule so I can complete my oldschool alpine sound quality dream stereo.Thanks so much. CareyLet me know if those help