subs for Sonus Faber Cremona M floor standing

No, IMHO the Cremona subs is not the best " road " even that because is a Sonus Faber product that could means synergy. Take this as a true statement is a mistake: synergy IMHO is understand the specific needs of those speakers and the subs that mate it in the best way.

Are you serious? If the Cremona M Sub isn't a good match for the Cremona M Floorstanding Speaker, then Franco Serblin and his whole operation should just pack up and go home.

There are several 3rd party subs that would work well--ones that offer the tools you need for a good blend--crossover points, continuously variable phase control, variable damping, and especially automated setup with EQ.

Still, the Cremona M sub is designed by people who know the Cremona M speaker's sensitivity, dispersion pattern, rolloff profile, crossover points, rise time, impulse response, and phase angles. I'm going to make a wild guess that they took those factors into account when designing a sub for it, especially when you consider that SF is known for a seamless, well-integrated house sound.

Add me to the run mains full range camp. Especially if you're happy with the mains down low and are only looking for some depth and a tad more slam. I actually had to fight myself to buy into this. Had always heard that cutting off the mains and getting 100% of the bass from the subs was the right way to go. played with all the settings on my dd12 for weeks trying to get it to sound as good as full range to the mains. I couldn't do it.

My gear sounded *much* better to my ears when running full signal to my aerial 7b's. With my dd12 volume set at a very low 11/100, it blends in seamlessly and gives me the bottom end I was looking for.

If there's something you don't like about your mains down low, I could see cutting them off. If a little more body and hit way down low is all you need, I think running full range mains is often the best way to go imho.

Cheers

Dear Johnnyb53: Design and build speakers is a totally independent audio design area, a different totally different area/subject.

Subwoofer design is a especialized area where you need different level knowledge that for speaker designs. Subwoofers IMHO is not part of the whole Speaker Area/Market is IMHO a totally independent area.

It is like a tonearm and TT: both different, with different targets and different needs.

As I said the subs subject is an especilized one and no I don't think that the Cremona subs can be better match for the Cremona speakers that and aftermarket one like the Velodynes or even the JL ones.

Till today I know no single speaker manufacturer that designed/build a subwoofer that can not only outperform but match better to his own speakers that those ones named here.

Many of you don't think so but subwoofers is not only an especialized audio area but a serious subject that needs good knowledge level to make the right decicions when we want to integrated in our home audio systems.

Yes, the subwoofer for a two channel systems is a misunderstood whole subject. I learned after several mistakes and that's why I posted what I posted and I can tell you that no one can argue about.
Till today I did not found out any person that integrated subs in true stereo fashion with afater market units that is not satisfied or left it.

Read this link where Halcro explain why he left subs:
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&207&4#207

and then ( one year latter ) read this one when he take the " sub-buss " again and why:

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&322&4#322

and this is only an example in that thread where there are more as are outside that thread.

My advise is try to learn about as I did and as I follow learning each day on almost every audio subject and no I'm not an expert on any audio subject, I'm sharing my first hand experiences about.

Regards and enjoy the music,
R.

Dear Tpreaves: No, certainly I did not.

Now, when you are looking for excellence and nothing less that excellence ( I mean on system quality performance. ) then you have a hard work ( like me. ) where we have to research, test, mistakes and learn. This cycle repeats several a lot of times till we learn an achieve the target and then the next audio link.
It took me 3-4 years to learn about subs and to learn why everything we learned about was wrong.

The main lesson I learned was and is that a subs integration is not for more deep bass but to lower the IMD distortion type of the main speakers and then comes the intrinsic subs advantages but these ones are IMHO not the main targets. Main target is to lower speakers IMD: this sole " characteristic " makes the difference for the better if you can discern about.

Main differences between two or more different audio systems is the knowledge level of each one system owner.

In audio as in other life areas know-how is the name of the game.

I have a very simple " method " to improve my knowledge level in audio: I always question every audio subject know-how I had/have with simple questions: is there a better way to do it/to achieve it? or what is wrong with that? or why thing have to be in that way? or is it true?

Many audio information that we already have and that's our each one background is absolutely wrong and many are only false myths that the AHEE by convenience teached and tech to us.

The subs subject is a clear example of that: where that is not what we always thinked.

Anyway, mi message here is to improve each single day " walking " with an open mind to learn and learn from any one at any moment in any place.

Regards and enjoy the music,
R.

Dear Johnnyb53: Please don't misunderstood me: I'm not telling that SF does not know how to design/build subs but specialized subs manufacturer IMHO have deeper knowledge about.

Maybe the main challenge to any sub other that goes deep on the 20hz and down is to handle its frequency range with aplomb and that's means with the same aplomb/accuracy that the main speakers and this means with low low THD distortion type.

All what we have on audio and audio systems IMHO is inside DISTORTIONS whole subject. A better quality performer system that other system is better only/mainly because has lower DISTORTIONS at each link in the audio system chains than the other.

The home audio system " enemy " ( other that each one of us it self. ) to beat has a name: Distortions, as we go lower on system overall distortions as better system quality perfromance level we achieve.

When I listen an audio home systems first target is not to hear how good it sounds but look for distortions: which kind and where.

On subs is the same we have to look ( everything the same ) for the lowest subs distortions figures.

Velodyne is my bench-mark with that glorious lower than 0.5% on THD. This measure of distortion can be achieved only because Velodyne engineering level and deep research over time where brought its servo-accelerator that sense/watch 16,000 times each second the woofer movements/behavior to avoid: guess what? yes DISTORTIONS.

Johnny, when I was searching and learning about what to choose for my system I emailed to any single subs manufaturer asking for information on performance. I asked the sub THD at 120db at 20hz, 110db and 100db and guess what? no one but Velodyne gives me that information.
All answer me and give me several information around that THD measures but the true is that no one even had on hand.

Don't trust in me: send an email to SF asking the same. Could be interesting for all to read which is the Cremona sub's THD and if you can ask for its frequency response range because in its site they don't mentioned or at least I can't find out.

Yes, Johnnyb53 we have to start to learn about distortions from a different point of view that we are accustom to.

Regards and enjoy the music,
R.