High pass crossover roll-off
I recently added a Crown 1502 amp to drive my front towers. I can set a high-pass filter on it with a 60hz roll off, to match the same crossover setting on my receiver. I was experimenting with turning off my sub woofers and playing test frequencies, but my Crown amp LED indicators (output?) were lighting up right from the lowest frequency through the step-up tones up to 60Hz; so these low frequencies were all coming through the Crown amp and the tower speakers. The towers are still set to "small" with the subs turned off (under the receiver's "audio" setting), so why am I still hearing frequencies below 60 Hz through the mains? I assume it isn't a "hard" cutoff at 60Hz, but why do I hear these <60Hz frequencies from the towers? Or does the receiver automatically route all frequencies to the front mains when the subs are turned off, even when the main front towers are set to small?
Marantz SR-7008, Pioneer DV-578A, Technics SL-DD2, Crown XLS-1502; Polk Monitor70s, RTi-A5s, CSi-A4, HTS12; Panamax 4310.
Last edited by Frank123; 12-11-2019 at 08:21 AM.