Originally Posted by activestatic
I have a Yamaha RN303. There is no sub out but I do have a B set of speaker terminals. If I got a sub with speaker in terminals, would I be able to set it up that way or will it not work?
Assuming your receiver's "B" outputs are like most and represent paralleled outputs off the same amps that power the "A" speakers, this should work fine. Your sub presents no impedance to the receiver's amps.
But even if you didn't have the "B" outputs you could still connect a sub in this fashion by wiring it in parallel either at the receiver's speaker outputs or at the speakers' inputs. Or, if your sub featured speaker-level outputs (high-passed or not; see below
) you could utilize them in the wiring scheme if desired.
Originally Posted by afrogt
Option B. You could buy a sub with high level inputs and outputs. Then connect your speaker A terminals from receiver to the sub and then connect your stereo speakers to the high level outputs on the subwoofer. then you could use the crossover dial on the sub to control what frequencies get sent to the subwoofer and what goes to your left and right speakers.
A sub's "crossover dial" setting doesn't affect what is sent to its high-level speaker outputs. A sub's "crossover dial" only controls the sub's variable low-pass filter setting.
Originally Posted by bobknavs
Are there any subs that perform a crossover for your "option B", rather than a straight pass-through?
(Not a rhetorical question. The few susbs that I checked, months ago, just did a passthrough on their line level input/output pairs.)
A (scant?) few subs have high-passed speaker-level outputs that are (crudely?) high-passed at a fixed value (usually somewhere ~80Hz-120Hz) and this allows a crossed-over setup, albeit with a fixed high-pass and variable low-pass. But, you're right, most subs that even feature high-level ins/outs nowadays are simply only pass-throughs.
Of course, even with speakers that are running full-range, you do use the speakers' natural low-end roll-off as the high-pass component, along with the sub's variable low-pass setting, to configure a "quasi" crossed-over setup when connecting a sub in this fashion, anyway.