I want to try running my tech 21 Trademark 10 as a second "channel" into my Line 6 Spi...I mean Axsys212 ( ), because I prefer analog>digital distortion, using the Line6's modulation and delays. If I run a chord from the FX loop of my TM10 into the AUX channel of the amp, will this damage it? I know that running a power amp into an amp can damage it, and I want to know if this would avoid doing that.

'89 MIJ Fender Strat
Rivera S-120
'60s PEPCO Model 211 5w head
'60s Paul (Pepco) 1x12 tube amp
'60s Harmony H303a 1x10 tube amp
Probably.. if a guitar pedal can take the fx loop send power level from the tm10 then an aux input of an amp should be able to handle it.
Pain is an illusion.
Schecter Hellraiser C-1 w/ Seymour Duncan JB/Jazz Combo
Pitchblack | Bad Horsie 2 | DS-1 | BF-2 | ISP Decimator | DD6
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It should work

-Gibson LP VM
-Silvertone Kentucky Blue
-MXR CC Delay
-Ibanez TS-9
-Egnater Rebel 20
-Avatar 1x12

My rig is simple
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You're not truly playing guitar unless you know theory.