The pursuit of bass...


Most people would probably say that the most important thing for a speaker to get right is the midrange and I'd have to go along with this myself. If the midrange is too shouty or too recessed or just tonally inaccurate, the other qualities of the speakers are pretty much pointless regardless of how great those qualities might be.

However, with that said, I do not think that the midrange is the most challenging part of a speaker to get right. In my opinion, that award goes to the bass frequencies. Sometimes I listen to a speaker and it is indeed the midrange or treble that is holding back the sound quality, but far more often, for me, it's the low frequencies. I find that I’m more forgiving of midrange flaws. Midrange flaws don’t impact my musical enjoyment as much as bass flaws.

Now, of course, the bass is also the most vulnerable to room acoustics which just exacerbates the problem. But, mostly I blame the speakers themselves. Many fine speaker manufacturers simply ignore the problem by rolling off the bass early. I won't name any specific brands to avoid a flame war, but this is very common. Often I will see specs for frequency response that indicates -6db at 50hz. This is typically very unsatisfying bass. Also, many speakers are not balanced properly across the frequency spectrum so that while they might dig down to 35hz or 40hz, they don't sound like it because the bass is always underwhelming compared to the volume level of the midrange and high frequencies.

The speakers that do attempt to reproduce good solid 40hz bass, often still sound quite bad when reproducing those frequencies. And I'm not talking about pipe organ bass here, I'm talking about the 35hz to 55hz range. Unfortunately, really good minimontors that are amazing with 60hz up, really are missing out on a lot of the presence and atmosphere created by those low frequencies. Emotionally connecting to the music and suspending disbelief is easier with quality bass reproduction. For some reason many audiophiles are willing to live without it. I can understand this since pursing quality bass can be a frustrating endeavor. Also there is cost to consider. Good bass typically comes from bigger speakers and is therefore considerably more costly. But even the best mini-monitors usually commit the sin of omission in the low frequencies.
jaxwired
Just looked at your system. Very nice (I have a Bryston B100) which should be the next thing I replace. Add a Rel sub AND replace the stock 30' cable. The cable will make a huge difference and make the sub blend in with the Dyns. I replaced mine with a nordost baseline and finally got the bass that sounds more natural (kind of like the C4's).
I agree that bass is challenging to get right, and integrate well. I've certainly heard speakers that integrate the full range from top to bottom very well indeed, so it is not by any means impossible. I do agree that the room will play a very significant roll in how successful it all comes off to the ears. Where subwoofers are concerned, multiples definitely help. Taking the bass demands off of the midrange drivers also helps midrange.
First off,I completely agree with your assessment re: bass and the degree of difficulty in getting it right. IMO. getting the bass right is the biggest and (for the most part) most expensive technical challenge a full range speaker designer faces..

OTOH, you note that speakers face room problems, but that you mostly blame the speakers. I disagree. After screwing around with this problem since I first started the hobby in the '70s, I have concluded that few, if any, speakers can offer smooth behavior below about 120hz. It's the room. I went the DRC route (subwoofers), got great results and called it a day. If you want to try and beat the room problem in the bass without DRC, I wish you the best of luck. I couldn't do it.

Marty
The sense of space and ambience one perceives from well made live recordings is more dependend on full, accurate reproduction of bass frequencies than other parts of the spectrum.
Agreed with all that has been said hear regarding getting all frequencies as close to 'right' as possible and the difficulties of getting midrange right as the alternative is often hard on the ears and intolerable. Full spectrum bass adds so much to the enjoyment of listening regardless of type of material; finding a speaker that has as much put into achieving the speed, accuracy, tonality, decay etc....for bass and deep bass frequencies is a very hard task. As others have said, if a speaker gets the bass right for jazz it often produces too much or sloppy bass for other types of music. I'm currently enjoying Focus SEs from Legacy in so many ways; they have excellent price to value/performance and most notably they are incredibly musical and do a great job across the entire spectrum of frequencies. I enjoy very much hearing the subtleties in the all the frequency ranges especially the subtleties of a double bass note in a jazz ensemble or any percussion instrument head being struck at low-mid (i.e. real-world) listening levels. I've heard a number of speakers that get these things right; they often cost much more than the SEs that will be in my system for years to come.