engl e530 cab output question

[YesIEffinAm]

I recently purchased an engl e530 tube preamp, and I’m loving the sound, but I’d like to hear it through some real guitar cabinets. It has a quirky feature which allows you to turn the stereo headphone output into a 3 watt power amp (with a clear warning to only use a stereo plug to avoid destroying the power amp). If I wanted to connect it to two cabinets, what cable should I use? It seems like a 1/4” Y-splitter cable is intended to be used for this purpose (TRS cables can handle up to 3 watts), but I’d like to make sure so I don’t end up melting a cable or damaging the power amp. The manual doesn’t go into further detail. Any tips or advice would be greatly appreciated.

 

[laxu]

I'd contact ENGL about this. I agree the manual is vague.

For a single cab, I assume you would use a speaker cable, but with one end of it replaced with a TRS plug where the Ring is just not connected to anything.