Hi!

I'm not too familiar with impendances and I'm trying to add a monitor speaker to my amp. As mentioned in the title, I'm using Marshall DSL40C combo, and in order to send my signal to my drummer on gigs I need to connect it to an active speaker (Behringer B12D - 8ohms). Currently I have stock speaker in the amp (70/80, 16ohms) but I'm thinking of replacing it with something different.

My question is - what would be the optimal combination (ohm wise) that would work without any danger to the amp? Can I put in the amp 8ohm speaker (amp speaker) in the first 8ohm output and the Behringer monitor on the other, or do I have to use 16ohm speaker (and what output is better to put it in) with the active monitor (changing the monitor is not an option unfortunately)?

Hope I didn't complicate the question too much!

Thanks!

I have an Axe Trak insulated speaker (here is a link to info on the speaker) www.axetrak.com/guitarmanual.pdf

When I have run it from the Marshall it has cut out after playing for a while, I have turned off the amp and then the following day used the amp with its built in 12" speaker and it has been fine. When i read the JTM 60 manual it said it is fine to drive a 8ohm from the external speaker output ONLY, not the internal out connection.

Is this OK? when things cut out it makes me worry about my Marshall and I really don't want to cause it any damage.... Also I have checked the speaker lead and that is all good, when it cut out it the sound broke up and faded in about 1 second. It is the 2nd time is has happened so i thought I best get some advice. The Axe Trak is great and means i can play a valve amp and get valve amp tone and not disturb my neighbours, it is a great bit of kit for home recording and I want/need to be able to use it. Any advice?

Thanks, Robin..