The HX-33-4525 transformer is specifically designed for use with intercom applications when connecting a 45 ohm loudspeaker 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 to 9kHz. The primary taps are 0.5 and 1W. Secondary impedance is 45 ohms. Model HX32-4570 is designed for 70.7V lines and HX33-4525 for 25V lines.