Orange recommends to use only one of the outputs at a time.

Mine is closed back.

Fulltone 69 - great tone but expensive

www.fulltone.com

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote> The AD15 <u>cannot</u> use both speaker outs at once. Yes it will run a 4X12 fine (and sound cool too!) but make sure if it's a 16ohm cab that it is plugged in to the 16 ohm output and th...

Can someone reply who knows the AD15, maybe from tech support? I don't want to ruin my favorite amp...

maybe I didn't write clearly:

- the AD-15 has two output jacks: 8 ohm and 16 ohm
- the internal speaker is 8 ohms, my 4x12" is 16 ohm
- the amp CAN drive both the cab and the internal speaker

my question is: is this correct or can it damage the amp?

I have mine since it came out, and there was only one situation where it was too weak without an additional 4x12: LOUD session with drums, bass, hammond (overdriven Leslie), vocals

blues-rock style; if you need a really clean sound, get another amp...

I have an AD-15 combo (12"). Can I connect both the internal speaker (to the 8 ohm jack) and my Marshall 4x12" (1960TV, 100 watts, 16 ohm, to 16 ohm jack) at the same time?