Author Topic: Is LS3/5A 15 ohms speaker better than the 11 ohms LS3/5A speaker?  (Read 42430 times)

Offline joamonte

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Offline malsound

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why is it so dam  hard to obsoleted this turning pieces of equipment ?

https://youtu.be/y3RIHnK0_NE

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Offline malsound

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why is it so dam  hard to obsoleted this turning pieces of equipment ?

https://youtu.be/y3RIHnK0_NE

https://youtu.be/FELbmXdS4xM

Offline malsound

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why is it so dam  hard to obsoleted this turning pieces of equipment ?

https://youtu.be/y3RIHnK0_NE

https://youtu.be/FELbmXdS4xM

Offline malsound

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why is it so dam  hard to obsoleted this turning pieces of equipment ?

https://youtu.be/y3RIHnK0_NE

https://youtu.be/FELbmXdS4xM

Offline titactoh

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Of all the Ls3/5a since its manufacture to recent production which is the most popularly sought after for the overall quality of its Sound

nostalgia aside.

And how many audiophiles with high end system still cling to a pair of these and for what purposes. Would be interesting to know.
« Last Edit: June 04, 2020, 19:19 by titactoh »
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Offline titactoh

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Bare in mind that LS3/5a in the beginning is design for monitoring voice in a small enclose area , like inside a Van mobile mixing room or a HDB toilet size monitor room...the BBC engineer never meant to use it listen music, 15 ohm is not a problem because they have a standard transistor amp (make by Quad) to match with it , and the "standard" BBC LS3/5a terminator is using XLR connector for space, safety and easy pluging reason (MIGHT be a reason for higher impedance design)...pls remember it is a just a grade B monitor that "not qualify" as music monitoring,to BBC , it only can be use to check the recording quality of human's speaking for their radio broadcasting.

My guess is some audiophile in the 70's , 80's that using tube amp with the 16ohm output tap accidently discover how good the sound from this speaker, and when more and more home user buy the speaker and drive with solid state amp, BBC/KEF change the design to 11 ohm so that it is more suitable for the budget SS amp...

The official reason BBC change the design to 11 ohm in 1989 is because the 15 ohm design KEF woofer (8 ohm) encounter high rejected rate , so they have to redesign the woofer , the new woofer impedance drop to average 6 ohm, so KEF  have to redesign the crossover , hence the overall impedance of the speaker become 11 ohm.

James , the main attractive point about 15 ohm model is that their crossover are made by different company, despite the values and circuit are the same, but different brand 15 ohm using different component, 11 ohm model all crossover are made by KEF.......and the 11 ohm crossover is not design by BBC famous engineer team , it is design by KEF, while I respect the KEF engineer knowledge, I think you also agree that KEF do not have too much great small speaker in their history ( ok 104/105 is good in old day , but those are floor stander, their own coda small speaker never really made it  :P )

This is educational and informative. I believe others looking at Ls3/5a will benefit with this background.

Thank you.
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Offline malsound

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<a href="http://www.youtube.com/v/JRAr_xxytRQ&fs=1" target="_blank" class="new_win">http://www.youtube.com/v/JRAr_xxytRQ&fs=1</a>
why is it so dam  hard to obsoleted this turning pieces of equipment ?

https://youtu.be/y3RIHnK0_NE

https://youtu.be/FELbmXdS4xM

 

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