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Dynamic compression in speakers themselves?

The primary audio characteristics I want to achieve in my system is an open, uncompressed, unstrained, and highly dynamic presentation.  What I don't know much about is how much speakers can or do contribute to loss of dynamics and impact.  I have a very powerful amp, but it seems that when I increase the volume, yes, the speakers get louder, but perhaps not commensurate with the increase in the volume control.  I do think I understand that this type of presentation is more easily achieved with larger scale speakers, but even with my large speakers, I feel something is wanting. 

I guess my question is, what factors contribute to any compression occurring in the speakers themselves?  Also, can the age of a speaker cause a loss of dynamics?  Mine are ~20 years old.  I'm thinking to get new speakers in the foreseeable future, so I'd like to understand more about this.  This question is in regard to traditional dynamic speakers.
mtrot
mtrot OP
804 posts
 
"Unless this is just a technical discussion about how loudspeaker drivers operate under stress."

Well, yes, that is mostly what this thread is about.  And not just with regard to the drivers themselves, but how they work in concert with the other components and from whence any dynamic compression might arise.  And to what degree the age of components within a speaker contributes to compression.  As I posted above, "I feel that understanding more about this issue will be of use to me when considering future speaker purchases."  Also, you might refer to my original post.  Thanks to all for sharing their technical knowledge and expertise.
erik_squires
16,152 posts
 
@mtrot - Magico has all their crossovers made by Mundorf. Quality commensurate with speakers grade.

Focal - Seems to OEM Solen/SCR mid-grade stuff for the most part. Horrible sounding caps IMHO.

B&W - Also a Mundorf user (but AFAIK build their own crossovers). They sometimes use the crossover grades to distinguish between speaker grades.

Monitor Audio - Uses OEM film caps, not sure who actually is the source.

Lawrence - Mid-grade Mundorf. Good sounding stuff appropriate for speaker prices.

Selah Audio - Uses top grade Clarity (my faves) among some models.

DeVore - Clarity

My list is what I remember and have observed, it should not be taken as gospel or exhaustive. If this sounds like I am promoting Mundorf, I like some of their products, but I like Clarity more, this is just what I happen to have seen or remembered. Buy and listen to whatever you like to. Just trying to answer with information I know about.


erik_squires
16,152 posts
 
While on the subject of woofers: There is no substitute for size when it comes to dynamics, extension and low distortion. Properly integrated into a speaker system and room, they are magical, and a rare thing indeed.

The idea that big woofers are "slow" is a myth born of bad speaker to room matching.

Best,

E
vahes
47 posts
 

Dynamic compression in speakers can be minimized but not entirely eliminated, there are classical record labels that are currently offering orchestral recordings on their SACD’s with no compression at all, BIS is one such label, the normal garden variety speakers simply choke with uncompressed recordings, but there are a number of speakers that handle uncompressed recordings with their own minimal compression.

For a speaker system to deal with uncompressed recordings the following is required:

Very high sensitivity starting at 96 dB and higher.

Very large speaker components, such as dual 15” woofers for the low end to ensure that individual drivers do not reach their limits while reproducing the loud passages.

Bi-amplified speakers, this is to by-pass the passive crossovers where distortion and compression starts at high volume levels. Another advantage of bi amplification is direct amplifier connection to drivers, no passive crossover to cause problems.

And finally, to practically minimize speaker induced compression a simple solution is to consider a speaker that is much too large and because of that it never reaches its upper limits in overall volume.

mtrot OP
804 posts
 
erik, vahes,

Thanks for the specific info!  Very interesting.
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