9448+ internal speaker alarm time?

HI I have a shed at the side of the house which houses an expensive motorbike. I have installed the scantronic 9448+with the onboard keypad in the shed. it is setup with a door contact and shock sensors on each wall, klaxon masterblaster and elmdene 600 internal sounder and a strobe.

One thing I would like to know is if the internal speaker is followed with the bell timer or if it is continous?. This is important to know because I want to use the speaker output to trigger the masterblaster. I find the first ply 30 second timer delay before the external bell sounds to long and the masterblaster would be destroyed by that time.
The elmdene sounder is just a backup sounder in case the mains were to fail.

I would like the blaster to trigger as soon as the 10 second timer runs out. but I need to know if the internal speaker is timed or continous?

cheers