https://integratornotes.com/2026-10-02 https://integratornotes.com/cards/028/2026-10-01 https://i.ytimg.com/vi/OeurA1KjBoE/hqdefault.jpg5.1 Surround Speaker Test — every channel in 60 s (true 5.1, play it on a TV app)New install or moved a speaker? Every 5.1 channel, one at a time, with the level measured on screen — in 60 seconds.https://www.youtube.com/embed/OeurA1KjBoE632026-09-30 https://integratornotes.com/cards/029/2026-10-02 https://i.ytimg.com/vi/a-nC84ap0Pk/hqdefault.jpgStereo speakers wired backwards? Left, right, center and polarity test in 40 sStereo system sounds thin, wide or off-center? Four test sounds at a calibrated level tell you if the left and right speakers are swapped, if the balance is off, and if one speaker is wired + / - backwards.https://www.youtube.com/embed/a-nC84ap0Pk422026-10-02