Originally Posted by RedInterior
"ppro" doesn't say where to get the signal for the Basslink. One way is to connect it to the signal to the original subs. This signal has the filtering assigned to the original subs. An alternative is to connect it to the output of the radio. This signal is not filtered.
Yes he does:
Originally Posted by ppro
Then I would put a new sub in the rear compartment powered by your new power source.
There are two options - either the new head unit has sub outputs (in which case they probably have High Pass Filters and Sub Cutoff options. Or out of the new power amp.
My plan is to go out from my head unit to my sub, bypassing altogether BOTH the factory amp and factory subs.
Since I'm working up the circuit drawing now, here's a preview:
This shows JUST the part added for the subwoofer circuit. Leads out from back of head unit (subwoofer or non-fading output)
And now the schematic for the part added to the factory head unit to power the Basslink. Head unit to Basslink leads showing high-level relationship.
And the details of the POWER connection on the Basslink:
Don't overthink this - it's two channels, power and a remote "on" lead plugged into a self-powered sub.
If you use unpowered subs and a separate amp, there would be signal leads from the separate amp, signal, power and remote "on" leads to the separate amp.
In both cases, the signal comes from the back of the head unit.