X5M Reasonably Loud and Quick Air Horne

[master1917]

I just bought my first BMW, finally. Its a 6 year-old X5M with 99k kilometers. The horn sounds ok, but thinking to add a second, loud one (not train horn) with a separate button. Looking at Marco Hurricaine (MARCO HURRICANE DEEP TONE COMPACT AIRHORN from Fox & Dragon for 60 at amazon) with a truck-low tone, but thinking to add a 2nd regular Marco which is more high pitch for a combo. Will it be too much load for the electrical system? Again this would be an alternative horn, for highway, etc. Otherwise, a more traditional 2-3 pipes with tubing and 1 compressor? Anyone had 2 Marco or Stebels running simulteneously?