\rHi Vincent:
The output from the AMP300 is not a true LFE (low Frequency Effects). I believe you can only get that output from a AVR Receiver with dedicated LFE output. The LFE by passes the controls of a dedicated sub woofer amplifier. Most AVR output a mono low frequency signal.
The Delay switch; this has to do with the time when you turn line 1 off and Line 2 comes on. It adjusts between 3 and 15 seconds. The problem is when you listen to line 1 and there is an extended silent passage the automatic source switcher will think line one has turned off and will now switch over to line 2 but as soon as the silent passage is over it automatically switches back to Line 1. The Automatic Source Switching is found on our lower end amps like the AMP120 and XMP100. The delay is less than 5 seconds and there can be issues with it switching prematurely to line 2. We added the adjustable delay to our AMP200 and AMP300 as an upgrade allowing you to set the delay up to 15 seconds. We typically recommend connecting to Line 2 input when connecting only a single source. Plus Line 2 output only pertains to whatever is connected to Line 2 input. It does not work with Line 1 input. So when you talk about connecting your sub amp it will only work for whatever is connected to Line 2 input.
TL/4537\r