rms, inc [me] invented the siren and i still have a few that can be built on custom order. i also used the duo-sonic in my volunteer fire days... nothing better.
please write if you are interested in one. rms, inc will bill you via paypal for a deposit, or can take your credit card via 'square register' and the remainder when ready to ship. it takes about 30 days for me to assemble one presently. $600 for siren and cables, w/nice microphone.
the ds-100-1 is for one 100W speaker. the ds-100-2 is for 1 or 2 siren speakers, 60W on one speaker, 100W with 2 speakers.
http://www.rms-inc-usa.com/linked/duo%2 ... l%20st.pdf
http://www.rms-inc-usa.com/rms-inc-usa_ ... _a_003.htm
hope this helps. if interested please write me at
[email protected] with duo-sonic in the subject line, or contact me here.
best.. richard