Why are center speakers so big?And is 100hz-20khz ok?

ALIEN1X

Active Member
Hello,

I was wondering why center speakers are so big?

And is the freq range of 100hz-20khz ok for centers?

Apart from voices going thru centers, what other sounds go to them?

Reagrds
Alien1x
 

stevefish69

Well-known Member
You may be surprised to hear that up to 80% of a movies soundtrack is carried by the Center speaker. If you don't believe me, disconnect the Center speaker from the amp end and watch a film :suicide:

Ideally all 3 speakers up front should be of the same size and type, but in the ideal world this would never happen. Center speakers can come in all shapes and sizes. What make and model are you actually looking at ?

100Hz - 20Khz sound about right if you are using a Sub to take everything below 100hz anyway. Just make sure the crossover on the amp is set up correctly.
 

ARNOLD AKIEN

Well-known Member
Hello,

I was wondering why center speakers are so big?

And is the freq range of 100hz-20khz ok for centers?

Apart from voices going thru centers, what other sounds go to them?

Reagrds
Alien1x

They aren't .. Have a look at these ...


http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/3585

Its mostly a Question of what you want to achieve from your Speakers, How you intend to drive them ... What sort of Receiver/Amplifier and how you intend to Feed them .. CD , DVD Blue Ray .. ??? AND how much do you intend to pay for all of this Stuff :devil:

Its Not How Big It Is But How You Use It that matters.:D

Oh and the Sound that goes through the center speaker is the sound that Should Go through the Center and that depends on the illusion that you intend to create in your viewing room, which in turn is dependent upon the size of your viewing screen.
 

badbob

Banned
100hz seems a bit poor bass response. I'd make sure it meets THX style crossover which is 80hz. But more important than that it has to be a high quality speaker. Center is for speech and effects.

Spend as much as you can on this speaker. I've compared Kef Q95C £200 and Kef Model 200 £700 and the Q95C sounds terrible.
 

BlueWizard

Distinguished Member
Just out of curiosity I check the frequency response of a range of center speaker at SuperFi. They ranged from 50hz to 140hz with the more typical being between 50hz and 75hz.

Acoustic Energy - (75hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/3223

Acoustic Energy - (55hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2070

Epos - (60hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2242

Kef - (50hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/1327

Quad L-ite - (80hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2750

Tannoy - (140hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/3000

Wharfedale - (70hz)
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2206

Keep in mind that the crossover for the Sub, is really about the Sub relative to the Fronts. The Center is a completely separate thing.

You would logically expect reasonably full response across the vocal range which is roughly 82hz to 880hz. But we would want a fair amount of harmonics to flesh the sound out. But I don't imagine much in the way of bass below about 100hz and certainly virtually nothing below 80hz. Anything in that range is coming from the fronts and Sub.

So, I think a 100hz low end is acceptable especially when combined with other matching components from the same manufacturer. Acceptable, but not necessarily ideal. It would seem more ideal for the Center to be a moderately full range speaker, as most of the speakers listed above seem to be.

As far as how big Centers are, how big did you expect them to be? They are speakers like any other. Certainly you can get tiny Centers if you are willing to accept tiny performance. But if you want big full clear sound then within limits you need big speakers.

Steve/bluewizard
 

ALIEN1X

Active Member
I Have the MS309i sub and trying to decide which center to go for 304c or 905, but it has to be compact.

However, I noticed that the freq range and size of the speaker is diffrent between the two and wondered if it made any diffrence?

I my intension is to use 302 or 902i at fronts and 302 as rears with a yamaha DSPAX761 AV amp.

Alien
 

BlueWizard

Distinguished Member
It would really help if you are going to talk about two separate Centers, then talk about the specs, if you would actually post the specs.

Yes, I can look them up, but so can you, and it would help get responses.

In general, if 'compact' is important to you, then that's how it has to be. It is not all about specs, to some extent, it is about needs. You need a compact center.
 

ALIEN1X

Active Member
Ok to keep it simple,

Yes I need a compact center,but want to know if there is a difrence in quality between the bigger ms905c (50hz -20khz) and the small ms304c(100hz-20khz). If all it handles is just voices?

For example would 100hz roll off be ok or would I need somthing that goes lower meaning a bigger center?

I always assumed that voices would be well above the 100hz range.

Regards
Alien1x
 

badbob

Banned
I can tell the difference in lower bass between a 85hz and 44hz centre speaker. And it's not just lower bass either, it's power handling. A speaker with 2 bass drivers and a mid range is going to be able to play louder and cleaner than a single 1 mid 1 bass driver.

The centre does more than just voice, primary effects come from the centre also. Watch Conan the Barbarian and James Earl Jones's voice is far more deeper with the Model 200.
 

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