Since the connection from amplifier circuit to right satellite speaker use 7pin mini-DIN connector, I try to search about ATP3’s mini-DIN pinout. For tone control, ATP3 use IC LM1035 from National semiconductor which use DC controlled bass, treble and volume technology.īut I have problem because all speaker control is on ATP3’s right satellite speakers. ATP3 configured the IC to work both in single ended and bridge, 2 channel in single ended configuration for powering satellite speakers and 1 bridge configuration for powering the subwoofer. This amplifier IC can be configured to work either in dual bridge or quad single ended amplifier. ![]() The heart of this amplifier is quad power amplifier TDA7337 integrated circuit (IC) from SGS-Thomson. Volume, bass, treble control and right speaker is connected to amplifier using 7pin mini-DIN connector. Left satellite speaker is connected to amplifier using RCA connector. Input signal is connected to amplifier using 3.5mm stereo connector. I opened up the ATP3 subwoofer and found that amplifier circuit is located inside subwoofer enclosure. ![]() In this project, I want to replace ATP3’s original satellite speakers with my Selenium surround speakers.
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