# Pro Dual DBW Hbridge 1 and 2 **URL:** \ **Category:** EMU PRO\ **Created:** [March 22, 2025, 3:28am UTC](https://community.ecumaster.com/t/pro-dual-dbw-hbridge-1-and-2/3398 "2025-03-22T03:28:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![FloorItGarage](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/flooritgarage/32/61_2.png) [@FloorItGarage](https://community.ecumaster.com/u/FloorItGarage)\ **Post date:** [March 22, 2025, 3:28am UTC](https://community.ecumaster.com/t/pro-dual-dbw-hbridge-1-and-2/3398/1 "2025-03-22T03:28:11Z")
Swear I saw a post or thread on this, can’t find it again or in the Pro software guide. When using dual dbw are we supposed to use H bridge 1 and 3? I tried using 1 and 2 and they have a crazy cross talk. swapped 2 to 3 and it actually finished a calibration. Anyway, thought I’d ask for clarity and potentially pass on a pro tip. ---
**Author:** ![mkuklis\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mkuklis_ecumaster/32/104_2.png) [@mkuklis\_ECUMASTER](https://community.ecumaster.com/u/mkuklis_ECUMASTER)\ **Post date:** [March 24, 2025, 10:56am UTC](https://community.ecumaster.com/t/pro-dual-dbw-hbridge-1-and-2/3398/2 "2025-03-24T10:56:54Z")
You should be able to use any combination of h-bridges. What do you mean by “cross talk”? ---
**Author:** ![FloorItGarage](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/flooritgarage/32/61_2.png) [@FloorItGarage](https://community.ecumaster.com/u/FloorItGarage)\ **Post date:** [March 24, 2025, 12:58pm UTC](https://community.ecumaster.com/t/pro-dual-dbw-hbridge-1-and-2/3398/3 "2025-03-24T12:58:12Z")
When I would run the test on throttle 1, throttle 2 was making noise. Same if I ran throttle 2 test, throttle 1 would make noise. I would get failed test after failed test. Worked fine after switching from Hb2 to Hb3 though