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The SEF Series of audio transformers offers a basic footprint that reportedly occupies less than 34 sq. cm (21.5 x 15.4 mm) and has a profile height of 7.8 mm. Frequency response is rated at 0.25 dB in the range from 200 to 4,000 Hz. Longitudinal balance is 60 dB over the same range. The transformer operates between -45 and 7 dB and is designed in its default configuration to meet FCC specifications under Regulation 15 for atmospheric noise. Primary impedances are all 600 W at 1 kHz. Secondary impedances range from 300 to 900 W; one model, SEF-2CT, offers dual secondaries of 300 and 600 W. Return loss at 1 kHz is 35 dB minimum.
Associated Components Technology Inc.
Garden Grove, Calif.