The Official KEF 105 Owners Registry

[moebuster]

I have parts.

 

[Dev Dog]

Question on the S/N for the 105’s…
everyone‘s serial numbers seem to have 4 digits but mine. My S/N starts with SR and only 3 digits. Just curious as to why this would be? An early pair perhaps?
cancel my last, just realized I was looking at the crossover board lol. Funny, it has the same label.

 

[Justin Mysza]

I just finished restoring a pair of 105/1’s. Thanks hjames for starting this!

 

[CPH-Guitars]

Here are mine before I started restoring them.
After recap with Falcon Acoustic set the midrange and high range got to hot/loud.
Did rewire them and that made a difference in the Bass.

Next step is to do a new cross over based on Morwar (thanks for sharing you layout with me)

The Official KEF 105 Owners Registry

Thanks for the feeback, I have been looking for an amp, I think it may take a bit to find something. I did notice there are a couple of Yamaha amps on CAM that have just popped up. I ordered replacement caps from Falcon and now I think I might hold off replacing them. These are quite...

audiokarma.org

 

[Morwar]

Here are mine before I started restoring them.
After recap with Falcon Acoustic set the midrange and high range got to hot/loud.
Did rewire them and that made a difference in the Bass.

Next step is to do a new cross over based on Morwar (thanks for sharing you layout with me)

The Official KEF 105 Owners Registry

Thanks for the feeback, I have been looking for an amp, I think it may take a bit to find something. I did notice there are a couple of Yamaha amps on CAM that have just popped up. I ordered replacement caps from Falcon and now I think I might hold off replacing them. These are quite...

audiokarma.org

Good morning Allan !!

You have la lot of work to do in order to get the best of these wonderful speakers, but if you follow what I’ve sent to you, you will get an enormous improvement in clarity, detail, resolution and refined sound

The templates that now you have, have some corrections and added resistors in order to compensate the ESR of the original components.

In the HF filter we removed the 0,028 mH coil in series with the tweeter because is no longer necessary due to the improvement in quality of the components. The upper graphic is without the coil, and the lower one with that coil operating

In the MF, C7 has been changed from 7nf to 15nf in order to get a flat response, altered somehow by the changes in the components. It is only a slight correction. See the graphs attached.

LF has only improvements in the quality of the components but the measurements of the graphics are not accurate because the laboratory of my friend is very tiny for that frecuencies.

For the incoming EVO III crossovers, I’m testing bypassing the 120 nF rumble filters and it seem to be ok and will be measured at home where I have space and proper acoustics. The other feature of EVO III is the twaron.

One friend measured the in room response and RT, and there are very little issues in the frecuency response, so tiny that I don’t want to compensate with ecualization. I’ll try to improve that in the future

Don’t worry about the Peak Level indicator because it doesn’t affect the sound and only takes very little energy.

 

[CPH-Guitars]

In the MF, C7 has been changed from 7nf to 15nf in order to get a flat response, altered somehow by the changes in the components. It is only a slight correction. See the graphs attached.

You mean C8 (C7 is 100uF) right?

 

[Morwar]

Sorry, is C6 from 10 to 15 nf

My speakers are from ultimate batches and hav simplified crossovers with these parts eliminated:

HF: C9, C11, C13, R3 / C12 from 2,2 to 3,3
MF: C6
LF: R1 from 29 Ohm to 33 Ohm

Earlier batches had the complete crossovers, that are unnecessary
If you follow what I did, it will work properly

See this video that has been taken by a friend last September with a Tascam recorder

 

[CPH-Guitars]

Here are mine before I started restoring them.
After recap with Falcon Acoustic set the midrange and high range got to hot/loud.
Did rewire them and that made a difference in the Bass.

Next step is to do a new cross over based on Morwar (thanks for sharing you layout with me)

The Official KEF 105 Owners Registry

Thanks for the feeback, I have been looking for an amp, I think it may take a bit to find something. I did notice there are a couple of Yamaha amps on CAM that have just popped up. I ordered replacement caps from Falcon and now I think I might hold off replacing them. These are quite...

audiokarma.org

I have ripped my Crossover apart and here are the measurement I made using a Peak Atlas ESR70 Gold (200KHz AC measurement) + Fluke 289 (using DC) and Peak Atlas LCR45 (using DC and 1KHz)

Special the 3.3uF drift is crazy and recapping is no luxury!

 

[Andyrlb]

Here are my apparently pre production 105’s .

 

[Pete B]

Does anyone have dimensions of the mid and tweeter boxes or even better
drawings of them? Are they online somewhere?