HX-33-4525, specifically designed for use with intercom applications when connecting a 45 ohm speaker to a constant voltage system. The small size of these transformers makes them ideal for use in compact spaces. The insertion loss will not exceed 1.5dB and the frequency response is +2dB from 150Hz - 9kHz. The primary taps are .5 and 1 watt. Secondary impedance is 45 ohms. Model HX32-4570 is designed for 70.7-volt lines and HX33-4525 for 25-volt lines.