HX Effects Advice in Helix Posted October 16, 2019 I'm worried I don't understand your questions. For example, on question 1, you're just wondering if you can have the HX wah before your "real" OD pedal? The answer is yes, use an FX block. However, in question 2 you mention the FX block which means you must know about them, so I'm thinking I don't get what you're asking? As for question 2 ... huh? I have no idea what you're asking here. You want to use a "real" modulation pedal but you can't because your HX Effects is already using a modulation block? That's how I understand that question but the solution is too obvious (remove the HX block) so that must not be what you mean.