Paradigm Subwoofer

[MACCA350]

How do you get that though? Now according to the graph you posted the Servo only goes down to 20Hz, -3dB at 85dB. If Paradigm's measurement was at 75dB I don't foresee it changing a whole 8dB compared to the 85dB measurement done by avtalk unless Paradigm is completely lying about the specs.

It's +/-3(6db total), which means that you take the highest db reading in the plot(in this case its 86db) take 6db off it(which gives 80db) and see where the plot crosses that point, and in this case its at 17.3Hz for the low end and somewhere just above 150Hz for the high end. Hope that clears it up.

I have the Paradigm 90P's and in my old room, which was HUGE(~20x20x18 plus the large kitchen area it opened to), they extended to 26Hz, -3dB and at 85dB, which is only 3Hz less than the Paradigm website suggests so considering the Servo is rated to 12Hz at -3dB and is more expensive than both of my front speakers combined I just don't see how they could possibly get away with advertising it as 12Hz and still sell it if in actuality it doesn't extend anywhere near 12Hz at -3dB, but is actually 20Hz, -3dB at 85dB, which is quite close to the performance of my(quite a bit cheaper) speakers from the same company.

Found an * next to the 12Hz claim on their site and here is what it refers to

* DIN 45 500. Indicates -3dB in a typical listening room

So their 'Low Frequency Extension' figure is in-room

cheers

 

[mike c]

Ok Mike, your move.

just when I could play around with subwoofers, Canada is cut off from HSU.
I wanted to try the MBM ... also heard about the musicality of HSU subs (good thing I can't hear those differences) actually, without the turbo, they don't look bad at all, but my number 1 subwoofer requirement is front firing.

 

[Nuglets]

Found an * next to the 12Hz claim on their site and here is what it refers to So their 'Low Frequency Extension' figure is in-room

cheers

Yes but all the tests that were done, including the test I did with my speakers were in room(a huge room for me, not sure about the room where they tested the Servo and SVS) and my speakers came quite close to their advertised low frequency extension at -3dB, but the Servo seems to be way off it's advertised low frequency extension. Thanks for better explaining the graph, but I am still under the impression that I would have to take 3dB off of the reference level to consider the low frequency response at -3dB Maybe I have too much faith in Paradigms advertising, but with my speakers it's just about right on so I tend to expect the same for the Servo considering it costs so much more than my speakers. Thanks.

 

[MACCA350]

Yes but all the tests that were done, including the test I did with my speakers were in room(a huge room for me, not sure about the room where they tested the Servo and SVS)

As I stated earlier the tests I posted are performed outside, so there is no room gain.

and my speakers came quite close to their advertised low frequency extension at -3dB, but the Servo seems to be way off it's advertised low frequency extension.

There maybe room/placement issues at play here

Thanks for better explaining the graph, but I am still under the impression that I would have to take 3dB off of the reference level to consider the low frequency response at -3dB

I can't say any more than I already have about the -3db issue, but I understand where you're coming from

Maybe I have too much faith in Paradigms advertising, but with my speakers it's just about right on so I tend to expect the same for the Servo considering it costs so much more than my speakers. Thanks.

Until we know exactly how they achieved that figure(ie volume levels, etc) there is no way of knowing how accurate it is. But as I said earlier if you use the graph I posted and extrapolate a 75db plot based on what is shown its quite possible the -3db point at that level is somewhere below 15hz(and thats w/o room gain)

cheers

 

[Nuglets]

As I stated earlier the tests I posted are performed outside, so there is no room gain.

There maybe room/placement issues at play here

I can't say any more than I already have about the -3db issue, but I understand where you're coming from

Until we know exactly how they achieved that figure(ie volume levels, etc) there is no way of knowing how accurate it is. But as I said earlier if you use the graph I posted and extrapolate a 75db plot based on what is shown its quite possible the -3db point at that level is somewhere below 15hz(and thats w/o room gain)

cheers

Oh, sorry I didn't see that your graph was from an outside measurement. Room/Placement issue is what I was thinking when I saw Sheeps graphs comparing the Servo and SVS, where the Servo seems to be rolling off much sooner than it should. Since the Servo is sealed and the SVS is ported I thought that placing them in the exact same spot to take measurements might be a bit inaccurate but as Sheep insists it makes no difference. Who knows I guess...I have no way of testing it .

 

[dobyblue]

It does make a difference. When I have mine set to 4/10 gain, 35Hz crossover and listen from in front of the driver to Underworld's "River of Bass" I can't actually see properly.
When I turn it around and listen from the back panel, no such distortion of vision exists.
The guys on AV Talk actually measure the SVS from different angles because it makes a difference.
http://www.avtalk.co.uk/forum/index.php?t=msg&th=13934&start=0&rid=14&SQ=1127556133

Configuration as tested:
Crossover: Disabled
Default 20Hz tuning (no port bungs)
Top grill: In place
Subsonic Filter: 20Hz
Phase: 0
Subwoofer lying horizontally with driver and ports equidistant from test mic.

http://www.avtalk.co.uk/forum/index.php?t=msg&th=13374&start=0&rid=14&SQ=1127556789

Configuration as tested:
Crossover: Disabled
Default 20Hz tuning (no port bungs)
Top grill: In place
Subsonic Filter: 20Hz
Phase: 0

 

[Nuglets]

It does make a difference. When I have mine set to 4/10 gain, 35Hz crossover and listen from in front of the driver to Underworld's "River of Bass" I can't actually see properly.
When I turn it around and listen from the back panel, no such distortion of vision exists.

I'm a bit confused as to what you mean by "see properly" and "distortion of vision". Do you mean it shakes your eyes and affects your vision? Also, are you changing your listening position or the direction the sub is facing? Thanks.