Sub+ Amp Installation/ Stock Head Unit

joelgas

Member
:
2009 Mazdaspeed3
Looking for some assistance with install of a sub and amp while keeping the stock head. I have an 09 Speed3.

What is the best way to do this? Do I need to wire the sub into the rear speakers, or is there a way to tie into the head unit. I will be running a single sub with a mono amp.

Thanks
 
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