What should I upgrade?

I believe that a pitched roof with beams on the ceiling will actually help break up any unwanted bass modes.

Before we worry about bass traps, perhaps we should get some bass first ; )

Rich

You need one Jl Audio F 113 or two of the smaller F 112 which are magnificent subwoofers.

Your room is huge, and the Maggies 1.6 are really too small for this size room 3.6 would be better,

More power couldn't hurt either it depends on how loud you play and how far away from the speaker you are.

The JL audio subs are really fast and blend well with these types of speakers, one of my customers had this subwoofer with a pair of $45,000.00 Scaena loudspeakers and the woofer could blend with this speaker which is really fast as well.

what cables are you using? more power would be great, two subs would be great, sure. but i would make sure that you're getting all the bass you can out of your system first to see where you stand.

i've never owned maggies and i don't know how sensitive they are to cables, but all the speakers that i've owned have been very responsive to different cables, particularly where bass is concerned.

i would think that the s300s would be able to get close to getting the lowest bass out of those speakers at low volumes, but (at least in my experience) that assumes that you've got good speaker cables and power cables on your components.

in my system, power cables on the components are as important as speaker cables for bass. recently i just got some nice (cryo'ed, for what that's worth) adapters to allow the use of 15amp power cables on c7 connections (those little 2-holed connections found on playstations and mass market electronics) and the difference on both my ps1 cd player and my hd cable box was great - the primary benefit being more bass. the two components had already been using a ps audio punch cable, which was a night and day difference over the tiny, stock cables, but using an even bigger/better cable was another jump.

so i would make sure all that is in place before spending tons on new amps.

Wow! I want to thank everyone for their advice. It sure is appreciated!

Re: Cables

Kimber Kable 4vs (15ft pair) for speakers (banana plugs).
Kimber Kable Timbre XLR interconnects (amp to dac).
Wireworld USB
Van den hul toslink.

Any reccommendations for speaker cable that will increase the bass??

well, a quick check shows that the 4vs are 13awg, maybe someone who knows maggies can speak to how they react to different cables?

my martin logans are not as sensitive as other speakers in terms of bass response because the panel doesn't go too low (so thin cables can carry the frequencies that it reproduces fine), but your maggies are supposed to go down to 40, so i would think a cable of 8 to 10 awg MIGHT make a difference, although i don't have any experience with that. my gallos react differently with ever cable i've tried on them, for example.

i'm sure that the kimbers are good cables, though, so if you haven't tried any aftermarket power cables, i would drop $50 on one to put somewhere in your system to see what that does. "my audio cables", element, and signal are all companies that have an audiogon presence and make great, inexpensive cables. for what it's worth, after i put a good power cable on my ps1 cd player, i had to turn the bass down on the back of my speakers (logans have powered cone woofers).