Industrial Covert Unlimited is in its 20th year of operation. CU1.COM has been up since mid 1999. Great security & CCTV products and people who answer the phone!
Check this out!
ETS SA1-HP 30 Watt Speaker Driver W/ 70V Input/Output or 8 Ohm for Audio Surveillance
The ETS SA1-HP is a line level input to 30 Watt, selectable 70V or 8 Ohm speaker driver (power amplifier) typically for use in 2 way audio surveillance systems. This device directly connects to DVRs and remote monitoring equipment.
The SA1-HP can also be used in any single zone public address application. Use one of the ETS speakers with a built in 70V transformer or drive a single speaker at 30 watts.
Additional features include an adjustable volume control, 120VAC input at 40VA, easy cable termination, and short circuit output protection.