[gsmollin]

Hia barun, and welcome to the forum.

I don't own a Denon, but if its similar to the Pioneer, settings are automatically saved, and are not lost when you shut off the AV receiver.

The crossover is rarely above 100 Hz, because the subwoofers rarely have any output above 100 Hz.

I imagine you want more bass... There should be a menu where you can adjust the levels of each speaker. There should also be a speaker setup menu, where you have test tones, or band-limted pink noise, and can adjust the levels of each speaker. I can add that AV receivers are one of those things that require a lot of study. Curl up with the manual and your remote, read, and then start trying out the menus.

The difference between big speakers and small speakers IS the bass extension. Some home theater front, center, and/or surround speakers have no response below 200 Hz. These types are usually about 4 inches or less across, and contain only a tweeter. Even small bookshelf speakers can be treated as large, if they are designed to handle a full range signal. One of the tricks of the HT speaker setup is to harmonize the fronts and subwoofer channels so that are adding to each other. At the crossover between fronts and subs, a phase notch can occur, where the two waves are out of phase and cancel each other. The result is a hole in the frequency response, and coloration of the sound.

So your choice for large or small is dictated by the results you get in the sound. Frequently, even large front speakers are set to small, to prevent a phase notch at the crossover frequency. However, with careful placement, and adjustment of the distance delays and/or phase control on the sub, you can get a smooth response.

Keep working on it, and you will get it right. it does take some time.