Bass management--high/low pass filtering

@bimmerlover 

if you know anything about logarithmic scales, at -10 dB it has dropped to a meaningless sound level, so has essentially -6 dB.

The F328Be:s taper out at 35 Hz at -3 dB, which is still a meaningful sound pressure. 

Exactly my point. You want the subwoofer to pick up that lower range. Those speakers do 35hz and up really good but you're not going to let them do their job. So, why did you buy them? Because they look impressive but you're only going to use half the drivers capability? Makes no sense to buy something and not use it because the tube amp is mis-matched to the capability of the speakers.

FYI... bass in music lives in the 35 to 80hz range where your speakers are optimum but your amp is weak.  

It's your system and you are free to set it any way you want. However, it's not good advice for everyone and could hinder more than help.

@gdaddy1 if you don’t like my approach, which I have explained in quite the length, why don’t you quietly move along. I was merely responding to the OP as I believe I have some relevant experience relative to his question. 

First of all deep bass is totally non directional. I've seen audiophiles stand right next to a sub crossed at 65 Hz and tell the demonstrator the sub wasn't working. The demonstrator had to take the grill off the sub and have the listener put his hand on the sub and it was roaring away. All 'sub' directionality comes from harmonics.

Secondly adding a high pass takes a huge load off the woofers of the main speakers and if done properly the frequencies above the high pass become more open and defined and dynamic. I know. I had stand mount SEAS Froy 3 speakers to which I added big woofers crossed with 4th order Linkwitz/Reily high and low pass filters at 85 Hz and it only took seconds to hear the improvement in the sound. The but is a simple generic high pass may not work. It may take a specialized high pass to work with your mains. The advantage of rolling in a sub where the mains roll off is the high pass is no longer a problem. But you're only getting half the advantages of adding subs.

@avanti1960  another +1 for the same rational as @gdaddy1 +1.

I was unable to enter the ELAC RS500 Manual. I found their Auto Room Correction claims uh, interesting.  

Forget me. I think you'll finally get to hear and feel the deep end of audio. Free shipping, product support and easy return policy. Bravo Elac!

Certainly seems like no brainer.  

All the best

M

JL audio's CR-1 active crossover will do the trick. About $3500 new I think, tons of flexibility for crossover points for high and lows, dead silent and transparent, excellent reviews. Feed your pre amp out into it and then your "trimmed" high level output back to your amp input; run the "bass" output to your dedicated subwoofer.