Quoted from NickBuffaloPinball:For those of you with a Pinwoofer kit, and that also hooked up an external subwoofer, how did you do it? How did you hook up the external subwoofer with the Pinwoofer kit installed?
Hey NickBuffaloPinball !
The only external stuff we plan to offer is in support of the PinWoofer Amp and we currently have a solution at the link below:
https://pinwoofer.com/pinwoofer-line-trimmer/
You've talked about PinWoofer in the stream quite a bit so I'll send you a unit + cables to play with.
This "Line Trimmer" gadget is for the GT Amplifier which has a studio / pro level out (+4dBu) so there's tons of drive for your sub and you can control the volume at the coin door location. This applies to all platforms (Spike, JJP, etc.).
+For the KO Amplifier on Spike-2 you can use the consumer line out (-10dBV) from the provided Line Out Board, but I would not recommend the Line Trimmer for this combination because you'll likely end up max-ing out the control to achieve adequate drive, so there's no point.
++I've been meaning to comment on JJP having seen some recent discussion to split the motherboard headphone audio to drive both the Factory Amp Card AND an external. A couple of problems; the track levels are highly attenuated to keep things clean and there are also some impedance matching issues when trying to split. As a consequence, there's not enough drive to supply both the Factory Amp Card AND a split to an external device. (Disclaimer - "generally speaking".)
We'll likely offer a solution to + and ++ that provides a pro level output in the future.
Good times!
GT - LO Use Model (resized).jpg