This seems to indicate that high Rin on the sub can have some deleterious effect on the subs performance?
^ @Toys4Boys
Other way around... You're sending the signal to two loads in parallel ... At least I think that's the way it works.
If the sub's Rin is particularly low (<20k)... then you've got a possible issue.
I think it's twofold.
Lower input impedance for the sub / higher current from the pre-amp. Pre-amp only has so much oooooomph.
Also... b/c the amplifier you're using for your main speakers is likely something 40k Rin or higher. Think voltage divider. Think if the Rin was 0 on the sub (yes, that's absurd, but it's just a thought exercise) => all the signal would go to the sub. You know the Rin of the speaker amp. His mightiness does too.
tl;dr - If both input impedances are 'high enough' and roughly similar (not orders of magnitude apart) then it's all groovy... I think... maybe...
.... I think ... therefore I am dodo ...
Other way around... You're sending the signal to two loads in parallel ... At least I think that's the way it works.
If the sub's Rin is particularly low (<20k)... then you've got a possible issue.
I think it's twofold.
Lower input impedance for the sub / higher current from the pre-amp. Pre-amp only has so much oooooomph.
Also... b/c the amplifier you're using for your main speakers is likely something 40k Rin or higher. Think voltage divider. Think if the Rin was 0 on the sub (yes, that's absurd, but it's just a thought exercise) => all the signal would go to the sub. You know the Rin of the speaker amp. His mightiness does too.
tl;dr - If both input impedances are 'high enough' and roughly similar (not orders of magnitude apart) then it's all groovy... I think... maybe...
.... I think ... therefore I am dodo ...
