Ok here's my quick story. I'm trying to do a little long distance recording with my brother. I'm on bass, he's the guitar player. I just got him a Focusrite Scarlett 2i2 for his birthday because his sound clips sucked so bad so I was trying to help the both of us lol. Anyway we're on the phone and he mentions he's gonna plug his all tube guitar head into the Focusrite because he wants his amps sound and I freaked out on him cuz I'm pretty sure he might make an early fourth of July fireworks show that way! I told him he very well might blow something up doing that and that the tube head needed to see a load. I also told him to get a decent mic and mic his cab and send THAT into the Focusrite if he wanted to capture his TUBE amp sound. So did I give my bro bunky advice or is there any truth to that? I think I read about tube amps needing to see speakers here on TB but I'm not 100% sure but I figured it was safer to tell him NOT to do it just in case... until I got to the bottom of this anyways. Oh and since we're on this topic is there any HARM in running my signal through my BX1500 without speakers attached then to an interface>computer? I want to say no but I'm pretty sure you guys will say that's a dumb idea anyways for some reason? Help I'm a complete to recording!