Disclaimer: I am NOT an expert on the Rumble LT25, nor on the Studio or Stage, nor for that matter the non-modeling Rumbles! But, I have a 500 combo and a Studio that I feel comfortable using and playing with. Now ...
A. While this isn't technically a modeling question, tommy, I'm commenting on
your post in the main Rumble Club thread here in the
LT25... Club sub-thread because
the discussion might help other LT25 owners who might be reading here, or
one of them might have the answer!
That, and most non-modeling Rumblers in the main Club thread, and even a lot of Studio & Stage modeling Rumblers here, don't realize what limited connectivity, but advanced features, the LT25 has!
2. It ain't mentioned in the manual, but the
7ender website says the LT25 headphone output is S
TEREO
! Because of that I would assume that the USB for recording is also S
TEREO. I know that on the Studio & Stage both the headphone and USB outputs are in S
TEREO
. That would make a difference in the connectors that you should use, and probably blending them together, in order to get the full output to go into your mono-only 500 combo. Sorry, I don't currently have any good ideas for this.
Maybe some of the recording enthusiasts here can help?
III. Seems like I had another comment, but I had to get up and go to another room while typing the previous paragraphs and my "old timers" made me lose that thought. (sigh)
Edited to add: uh, ...
D. Oh, yeah, now I remember! Be sure to check the signal strength and/or impedance level (or whatever electronic stuff applies) before connecting too much stuff together! Don't ask me specifically what, or how, to check. It just seems like something that could be problematical.
Good luck, tom t 'rific.
.