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SpeakerTalk This forum has been set up to facilitate discussion of 1970s KEF speakers and drive units. The owner of the Forum has no connection with KEF Audio.
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Log in| Search found 37 matches |
| Author | Message |
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 Topic: KEF 105 vs 105/2 |
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| habrune Replies: 70 Views: 104934 |
 Forum: KEF Speakers from the 1970s Posted: Sat May 23, 2020 11:41 am Subject: KEF 105 vs 105/2 |
| Speakerguru and Audiolabtower, thanks again. Yes you did enlighten this point earlier Speakerguru, (I devour all on this forum, shy to ask questions already answered) great to know all these details! ... | |
| Topic: KEF 105 vs 105/2 |
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| habrune Replies: 70 Views: 104934 |
Forum: KEF Speakers from the 1970s Posted: Fri May 22, 2020 3:39 pm Subject: KEF 105 vs 105/2 |
| Audiolabtower, Speakerguru, thanks again!
Speakerguru, You confirmed earlier in another thread about the B300 you designed, that: No. SP1060 and SP1071 have the same magnet and moving parts. Onl ... |
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| Topic: KEF 105 vs 105/2 |
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| habrune Replies: 70 Views: 104934 |
Forum: KEF Speakers from the 1970s Posted: Fri May 01, 2020 7:10 am Subject: KEF 105 vs 105/2 |
| Audiolabtower, thanks for your comment. Also thanks for your and Speakerguru's answers in another thread to another member concerning the bituminous damping pads in the 105; I had the same questions, ... | |
| Topic: KEF 105 vs 105/2 |
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| habrune Replies: 70 Views: 104934 |
Forum: KEF Speakers from the 1970s Posted: Thu Apr 30, 2020 4:47 pm Subject: KEF 105 vs 105/2 |
| Sorry to revive this old thread; but to confirm:
I recently acquired old 105-I heads with XO boards, and these were also completely populated. This was under discussion. So WITH C9 (30uF) parallel ... |
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| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Sat Oct 06, 2018 8:29 am Subject: Advice please on 105-II recap |
| Yes that is inaudible. My experience is that differences of about 1 or 2 dB are in an absolute sense inaudible and neglectible, but when tuning e.g. a tweeter to midrange level small differences of 0. ... | |
| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Thu Oct 04, 2018 9:54 pm Subject: Advice please on 105-II recap |
| That's great engineering! I love these details, thanks! So, I expect the voltage sensor is high impedance. Further, if it senses mean RMS, it won't bother about EMK spikes supposedly generated bij the ... | |
| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Mon Oct 01, 2018 11:07 pm Subject: Advice please on 105-II recap |
| I disconnected the S-stop circuitry totally (diconnecting the 6-strand lead from the inside of the connector on the head, black-blue-red-yellow-white-lightblue). I also bypassed the relay connections. ... | |
| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Mon Oct 01, 2018 12:52 pm Subject: Advice please on 105-II recap |
| Speakerguru, thanks. In that line of thought one could remove the 47R to increase output but I fear the 47R is also there to dampen resonance between the caps and the voicecoil inductance (as does the ... | |
| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Mon Oct 01, 2018 11:03 am Subject: Advice please on 105-II recap |
| Audiolabtower, thanks for the reply. LED's are functioning well and I aligned the heads. Marvelous stereo image. The T52 have only the R3 = 47 Ohm as 'zobel', C12 is a short.
In my CS9's I had exchan ... |
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| Topic: Advice please on 105-II recap |
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| habrune Replies: 17 Views: 37137 |
Forum: KEF Speakers from the 1970s Posted: Sat Sep 29, 2018 10:47 pm Subject: Advice please on 105-II recap |
| An acquaintace asked me to recap a pair of 105-II's Early serial no. 1113. I measured all the caps and all of them about 10% larger than nominal. Quite normal as I learned from very usefull informatio ... | |
| Topic: Rebuild 105 from CS9 |
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| habrune Replies: 12 Views: 22991 |
Forum: KEF Speakers from the 1970s Posted: Mon Sep 10, 2018 1:42 pm Subject: Rebuild 105 from CS9 |
| Thanks Speakerguru. That ring is still in place, pff...(sweat..) | |
| Topic: Rebuild 105 from CS9 |
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| habrune Replies: 12 Views: 22991 |
Forum: KEF Speakers from the 1970s Posted: Sun Sep 09, 2018 1:42 pm Subject: Rebuild 105 from CS9 |
| That is a reassuring reply, much appreceated, and thanks for the values, a help in the sense that tuned values are not that far off so that the Falcon kit will do.
Thanks for this illuminating thread ... |
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| Topic: Rebuild 105 from CS9 |
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| habrune Replies: 12 Views: 22991 |
Forum: KEF Speakers from the 1970s Posted: Sun Sep 09, 2018 7:52 am Subject: Rebuild 105 from CS9 |
| Audiolabtower, I have to apopogize because I see that you adressed in other posts your 105 recap issue etc. in detail. Didn't do my homework properly, sorry.
One question remains: you mentioned the ... |
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| Topic: Rebuild 105 from CS9 |
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| habrune Replies: 12 Views: 22991 |
Forum: KEF Speakers from the 1970s Posted: Sat Sep 08, 2018 2:17 pm Subject: Rebuild 105 from CS9 |
| Audiolabtower and Speakerguru: Very pleased by your very informative answers. Thank you, really great to hear the information that is hard to get.
Am I correct to conclude that the bottom line is w ... |
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| Topic: Rebuild 105 from CS9 |
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| habrune Replies: 12 Views: 22991 |
Forum: KEF Speakers from the 1970s Posted: Thu Sep 06, 2018 11:11 pm Subject: Rebuild 105 from CS9 |
| Yes, thank you for the link, I am aware of the admirable KEF matching procedure and the Falcon offerings (I recapped 103's, 104's and cantata's). Did you measure 3.526/3.556 at the time when the 105-I ... | |
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