40hz ratings/speaker response


Hi, as a neophyte to the technical end of this wonderful addiction, I am curious. If a speaker's frequency response capability is rated to say 40hz or above, what happens to that sound that was recorder that falls below that range? Say for instance the lower octaves on an accoustic piano, or a cello, electric bass etc? And again, what happens to a speaker, with the same rating, if the volume is "pushed" to hear and feel music that has a lower range?
Curious
joeb

Showing 5 responses by clueless

Thanks for the info folks. You have to be careful about jumping to conclusions based on that spec.

I would much rather have a speaker rated 40hz or so that handled that really well than most speakers sold today rated below that number. Northcreek is a good example.

Cheers,
As Scott Campbell (and others) said in the first post your number was the frequency where your sound is down three decibals(-3db). This does not say much about the quality of any speaker despite the fact that it is used that way sometime. Lots of speakers with really low specs sound horrible. One the other hand, you look at a North Creek, I think their Rhythm has a rolloff/F3/-3db point (what ever you want to call it) that is not that deep by today's standards. Maybe 44hz. And it has a tuning frequency (Fb) of 39hz or so. Sean pointed out that vented designs progressively lose damping below that point.

However, the design of the speaker does a great job reproducing sound in the high 30hz and they sound very musical. The www.northcreekmusic.com site is worth a look. You can listen to this speaker in the right room without feeling you have lost the last octave of music. At least I can.

I remain,
Ursula:
It's probably not your amp. Are you familiar with the Fletcher-Munson curve? Psycho acoustics play a big role. Our ears are more sensitive to certain frequencies than others. See www.allchurchsound.com/ACS/edart/fmelc.html or do a google search under "Fletcher-Munson." There are lots of sites that discuss this.

I remain,
Hi Twl:

Was just going through this site as I saw your post back here. You might enjoy??? ("God-awful" voigt pipe from the club of Norway", he says) it if you haven't already been there. I'm not sure what to make of it. I'm messing around with a few of the same Qs you are it seems.

www.geocities.com/rbrines1/index.htm

Cheers,
Ryder