What?  Are you serious? Nooooooooo!

So the new Spider IV HD 150 that arrived today I cannot simply use with my Marshall 1936 2x12 with 75 watt celestions at 8 ohms mono like I do with my Spider Valve HD100 (so, I got the IV HD 150 as a backup to the Spider Valve which intermittantly doesn't work)?

Why would one have to use an amp head in stereo?  Isn't that for preamps and separate power amps?!?

To quote the manual that came with the amp:

"Provides an 8 ohm load at each jack, wired in parallel, to give a 4 ohm if used simultaneously."

It says "IF" used simultaneously and nothing about damage to a transformer if only one tap is used.

Please clarify so I can return this thing during the 45 day policy if necessary.

I am bummed as I think this amp sounds pretty cool.

OR, can I run both outputs into each input of my 1936, which is a stereo OR mono cab.  This would be 2, 16 ohm loads I think...is this safe...it should be since the amp will see more resistance and not less, right?!?!  My big Mesa 4x12 cabs have 4 input jacks (they are not at my home so I can't look at them)...but again, if I have to take any of those big guys, it defeats the purpose of the Spider IV as a means to creating a smaller, more compact all-in-one type rig for certain venues.

This is very confusing and I watched the videos about matching cabs to amps on this site.

Hopefully I misunderstood this since its late here, and my ranting and raving is for naught!

Message was edited by: rayneman