akalchschmid Posted December 13, 2018 Share Posted December 13, 2018 Hi all, I have a question regarding the circuit diagram of the Spider Valve 112 MK1 (I attached a screenshot from the manual). As I read it, the “All-tube power amp” section consists of the pre-amp tubes AND the power amp tubes. However, the “Preamp out” is right before that section where the pre-amp tubes are. And the input to this “All-Tube Power Amp” section is labelled “Power Amp In”. So, when I go with an external signal (in this case from Hx Stomp pedal) into the “Power Amp In”, I still use the preamp and poweramp section of the Spider Valve, correct? Although the section from “Guitar in” to “Preamp Out” is completely bypassed. I’m confused… Quote Link to comment Share on other sites More sharing options...
psarkissian Posted December 13, 2018 Share Posted December 13, 2018 What manual? Never seen this. Don't mess with it. stay out of the insides of it. The shock hazard is too dangerous. It really hurts when you get zapped. Quote Link to comment Share on other sites More sharing options...
akalchschmid Posted December 13, 2018 Author Share Posted December 13, 2018 This manual: https://de.line6.com/data/6/0a060b316ac34f05935d6c78e/application/pdf/Spider Valve User Manual - English ( Rev A ).pdf Quote Link to comment Share on other sites More sharing options...
psarkissian Posted December 13, 2018 Share Posted December 13, 2018 The buffer stage before the pre-outs are also pre-amps. The tube power stage has pre's as well. You don't go high gain all at once, so there are two pre-amp tubes. Typical in such a configuration. It's a hybrid amp, pre stage out of the processor board, a pre stage for the input of the tube amp section. Quote Link to comment Share on other sites More sharing options...
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