My son tried using a double-bass pedal from his regular drums on the Alesis Nitro kick pad, but the pad was too small. His double bass pedal clamped directly below one of the beaters, and the other one didn't hit. I don't know if all double bass pedals are like that, or if some have the clamp centered between the beaters, or if that would work anyway. Where the clamp is located and how far apart the beaters are would be two things you'd need to look into before buying a double pedal. If you have a music store near you, you could take your pad with you to see if any double bass pedals they have available would work.
Since we already had an unused single pedal, we bought a second kick pad, the Yamaha KP65 Electronic Drum Kick Tower. There are others on Amazon as well. It's plugged into the aux Tom input. That's a different option you might not have considered. That was cheaper than the double bass pedals I saw, but if you don't already have a spare single pedal, you'd have to take that cost into account.
We have an Alesis Nitro, and the beater pad is kind of small. We have a double pedal for real drums, but they are aligned with one right over the center of the clamp, and the other off to the side, and there was no way to get it to clamp and have both of the pedals hit.
We also had a spare single drum pedal, so it was cheaper to get this second kick pad than to buy a different double pedal. The Nitro doesn't have a second bass pedal input either, but it has an aux cymbal input and an aux tom input, and we were able to plus the second kick pad into the aux tom input. So we have double bass pedal using two kick pads.
~~So does your Forge have aux inputs you can use?~~ Just looked at the Forge on Amazon, and it's got the same tom 4 and crash 2 additional inputs as the Nitro. Before I bought the Yamaha, I plugged the Nitro's pedal into each of the aux jacks, just to check that it could detect a kick there. A little light came on on the drum brain, so I figured it was a safe purchase.
The Yamaha kick pad also allows pass through. You can plug your existing pad into the Yamaha, and the cord from there is a stereo cord, so both pads can send a signal to the drum brain. AFAIK, the Nitro doesn't support that input for the bass pedal, so we can't hook it up that way, but maybe your Forge does. (I'm assuming that's how that will work, but I'm not an E-kit expert.)
The Yamaha pad has a 4 inch clamp zone, compared with the Nitro's 3 inch zone, so it's also possible the double pedal would have worked on that, but we've never tried.
I'll also mention that you can use the hi-hat pedal on the Nitro as a second kick pedal, although it's going to feel different.
We got the Yamaha KP65. I don't know first hand how well it works with a double bass pedal, since we already had a second spare single pedal to use with it, but some of the comments at the Amazon link say it works well. We just plugged ours into the Aux Tom input of the Alesis Nitro.
We have a second kick pad, the Yamaha KP65, plugged into Tom 4, for double bass pedal. We had a spare bass pedal laying around, so we've got a single pedal on that and on the original kick pad.
Great! From what I've been reading the felt beaters are bad if your kick tower is mesh (looks like yours is). I have the Yamaha KP-65 which is all rubber, but this is good to know anyway.
My son has a double kick pedal for his real set, but couldn't get them to work for the Nitro kick pad. The hit points are offset from the clamp, so one of the beaters doesn't line up with the pad at all.
Does anyone have any thoughts about the Yamaha KP65 Electronic Drum Kick Tower? It's only $65, and would give a second independent kick pad. You'd need a second regular drum pedal (which we already have, from before he got the double pedal). That kick-pad has an Aux in, so you can daisy chain the Nitro kickpad through it. I'd hope that would "just work", but I don't know how it works electrically. Another approach would be to just plug one of the pads into the extra cymbal jack or the extra pad jack that the Nitro has.
Does anyone know about this Yamaha Kick Tower? We already have a single pedal not in use, and the Yamaha beater is supposed to allow daisy-chaining, so the idea would be to plug the Alesis beater into the Yamaha, then the Yamaha into the Alesis drum module. Then there would be two independent kick pads as far as placement. This seems to be a cheaper option than a double kick pedal.
If you don't want to deal with two kick pads, you can just buy a wider kick pad and get an actual double kick pedal. I did this about 6 months ago and it works out super well, but definitely don't try to put a double pedal against the stock nitro pad because it's definitely not big enough
Here's what I bought from Amazon: https://smile.amazon.com/gp/product/B001R2RA4E/ref=od_aui_detailpages00?ie=UTF8&psc=1
https://smile.amazon.com/gp/product/B003XJLLCQ/ref=od_aui_detailpages00?ie=UTF8&psc=1
Which console? Please don't be on Xbone...
> AND how I can set double-bass up on it.
We have the Alesis Nitro, which is the cheapest of them, and the kick that comes with it was too narrow for the double bass pedal we had. I think some of them come with wider kicks, so it might be possible on those, IDK. Some double pedals might work better as well, ours had the clamp directly below one of the beaters. Maybe some have the clamp centered.
We already had a spare single pedal, so instead of a double pedal, we bought a second kick pad. This is plugged into the aux tom input, and works fine there.