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105.2 inside cabinet photos

 
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François
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Joined: 06 May 2009
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Location: Rennes, France

PostPosted: Wed May 06, 2009 6:26 pm    Post subject: 105.2 inside cabinet photos Reply with quote

I'm new here, but I know I love to see how are made the cabinets that I never saw in real life.. So I thought some readers may have interest in these photos I made from my pair of 105.2.
They are all original, dated from 1980 (speakers and cabinet)

For you experts I have a question too : I read somewhere in this board, I can't find where but I think Colin wrote it, that the 105 had larger cabinets and "an octave more" than the 105.2. Is this confirmed ? From all sother sources, it looks like the cabinets and frequency response were the same ?

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speakerguru
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PostPosted: Thu May 07, 2009 8:00 am    Post subject: Re: 105.2 inside cabinet photos Reply with quote

François wrote:
For you experts I have a question too : I read somewhere in this board, I can't find where but I think Colin wrote it, that the 105 had larger cabinets and "an octave more" than the 105.2. Is this confirmed ?

No way. To halve the resonance frequency, the box volume would have to increase times four.

Nice pictures Smile
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proffski
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Location: Tewkesbury UK

PostPosted: Thu May 07, 2009 9:02 am    Post subject: Re: 105.2 inside cabinet photos Reply with quote

speakerguru wrote:
François wrote:
For you experts I have a question too : I read somewhere in this board, I can't find where but I think Colin wrote it, that the 105 had larger cabinets and "an octave more" than the 105.2. Is this confirmed ?

No way. To halve the resonance frequency, the box volume would have to increase times four.Nice pictures Smile


What was the designed Qtc for the loudspeaker, 0.7 Butterworth?
Increasing the cabinet size would meander off the design parameters.

(Excellent pictures François, thank you!). Smile
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François
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Joined: 06 May 2009
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Location: Rennes, France

PostPosted: Mon May 11, 2009 7:11 pm    Post subject: Reply with quote

Well, I found it and it was not hidden. It's here in a thread called "Whats the difference between KEF 105 & 105.2"

ColinR wrote:
The 105 uses a six point mount B330B in a big box.
The 105-2 uses a three point mount B300B in a smaller box.
Therefore the 105 has an octave (or more) at the bottom end.
The mid and treble transducers are in "heads" with identical volumes.
The crossovers for the mid/treble appear to be identical to the first varient 105-2.


So.. does the 105 have a larger box or not ? Rolling Eyes
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ColinR
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PostPosted: Mon May 11, 2009 10:06 pm    Post subject: Reply with quote

Quote:
ColinR wrote:
The 105 uses a six point mount B330B in a big box.
The 105-2 uses a three point mount B300B in a smaller box.
Therefore the 105 has an octave (or more) at the bottom end.


Should have corrected that Embarassed as the boxes are the same size and the -6dB point is 33Hz in both designs.

Subjectively though the 105 feels as if it goes lower as it does have trouser flapping bass.
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proffski
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PostPosted: Mon May 11, 2009 11:02 pm    Post subject: Reply with quote

ColinR wrote:
Quote:
ColinR wrote:
The 105 uses a six point mount B330B in a big box.
The 105-2 uses a three point mount B300B in a smaller box.
Therefore the 105 has an octave (or more) at the bottom end.
Should have corrected that Embarassed as the boxes are the same size and the -6dB point is 33Hz in both designs.Subjectively though the 105 feels as if it goes lower as it does have trouser flapping bass.


So, physics aside, is somehow one enclosure loading the room better than the other?
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man standing in a bucket and trying to lift himself up by the handle.
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François
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Location: Rennes, France

PostPosted: Mon May 11, 2009 11:06 pm    Post subject: Reply with quote

Thank you for your reply and correction Colin Smile
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