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#35002 - 02/06/05 08:18 AM Re: Replace Velodyne with LFM?
wingnut4772 Offline
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Registered: 01/12/05
Posts: 368
Loc: Miami
I can not seem to find the lower -3db limit on the Sonus Faber Solo. The most I am able to find is frequency response 40 -20.000 Hz. Is this anywhere close? I do see the -3db on the Polk site for the Lsis and the Rtis. And , at the risk of sounding like a dweeb, what exactly is a 'lower -3db limit' anyway? (Caution:Learning In Progress).
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#35003 - 02/06/05 08:23 AM Re: Replace Velodyne with LFM?
silversport Offline
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Registered: 12/27/04
Posts: 326
Loc: ChicagoLand/USA
wingnut4772...no problem with the learning...I am not quite sure of that myself but I believe it is a measure that the manufacturers pick for the frequency response...if you set your crossover near (but always "above") that point...your lowest frequencies go to the sub and your "mains" can concentrate on the rest (mids and hi's)
gonk and others take their time with newbies 'round here.
Bill
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#35004 - 02/06/05 08:36 AM Re: Replace Velodyne with LFM?
Bob Walters Offline
Deputy Gunslinger

Registered: 01/15/05
Posts: 12
Loc: Bronxville, NY
Wingnut,
I have 2 LFM-1's in my room. Cranked up...a little.....NO LOCALIZATION!!! A great buy!

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#35005 - 02/06/05 08:38 AM Re: Replace Velodyne with LFM?
gonk Offline
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Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
When a frequency response range is given and identified as "-3dB" it means that the high and low values shown are the points where speaker output has dipped 3dB from the baseline output. Think of the response as being nearly flat across most of the speaker's range (from perhaps 100Hz to close to 20,000Hz), but with slopes dropping off at the left of right. Where those slopes pass the point 3dB below that baseline is where these upper and lower limits are. It's a way of consistently comparing apples to apples for frequency response between different brands of speakers (it's also useful for determining crossover points, of course). Your LSi15's, for example, list an "overall" frequency response of 22Hz to 27,000Hz, but the -3dB response range is 30Hz to 26,000Hz. This means that they may be capable of producing a 22Hz tone, but it will not be at or very close to the same "loudness" as tones from higher frequencies - that slope will have fallen off several dB more.
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#35006 - 02/06/05 05:56 PM Re: Replace Velodyne with LFM?
wingnut4772 Offline
Desperado

Registered: 01/12/05
Posts: 368
Loc: Miami
Oh...okay that makes sense. Thanks again. I just set up my 950b.(see 950 thread for initial impressions) ( It came early) 60 sounds pretty good for the fronts and eighty for the back. Can I put the surrounds to 'large' since they are floorstanding or am I better off leaving them 'small'?. Without a doubt this Velodyne has to go. Placing the LFM order .....
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#35007 - 02/06/05 06:12 PM Re: Replace Velodyne with LFM?
gonk Offline
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Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
I'd probably set the surrounds to small even if they are floorstanding.
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#35008 - 02/06/05 09:15 PM Re: Replace Velodyne with LFM?
wingnut4772 Offline
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Registered: 01/12/05
Posts: 368
Loc: Miami
I think probably too. I will experiment though in my usual obsessive compulsive manner.
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#35009 - 02/08/05 04:23 PM Re: Replace Velodyne with LFM?
curegeorg Offline
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Registered: 11/15/03
Posts: 1012
Loc: Raleigh, North Carolina, USA
if a speaker is large (i.e. floorstanding) and/or full range, then it should be set to large. ideally you could just set the crossover for each speaker independently of its size setting, not everyone allows that though.
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#35010 - 02/08/05 06:14 PM Re: Replace Velodyne with LFM?
wingnut4772 Offline
Desperado

Registered: 01/12/05
Posts: 368
Loc: Miami
If I set it to Large do the crossovers still apply?
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#35011 - 02/08/05 07:55 PM Re: Replace Velodyne with LFM?
Keta Offline
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Registered: 12/29/02
Posts: 358
Loc: Central VA
Nope

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