SpeakerTalk Forum Index 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.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

kef 103.2 low top end?

 
Post new topic   Reply to topic    SpeakerTalk Forum Index -> KEF speakers
View previous topic :: View next topic  
Author Message
avnewbee
Introductory Contributor


Joined: 13 Apr 2015
Posts: 4

PostPosted: Mon Jun 29, 2015 10:22 am    Post subject: kef 103.2 low top end? Reply with quote

Hi All,

Was checking the frequency response of my diy sub yesterday and when I did a full sweep upto to 20k I noticed that my kef 103.2s were pretty flat upto around 13k but then dropped by 20dbs between 13k and 20k.

does that mean my capacitors need replacing? as I thought these speakers were supposed to be flat to 20k and -10db to 30k. -20db for upto 20k doesn't sound right?

regards
Back to top
View user's profile Send private message
speakerguru
VIP Contributor 750+


Joined: 18 Nov 2005
Posts: 959
Location: Green Hut, Tovil

PostPosted: Mon Jun 29, 2015 6:59 pm    Post subject: Reply with quote

I'm not trying to be funny but could this be (your) age or damage related hearing loss rather than any change in the speakers?
Back to top
View user's profile Send private message
avnewbee
Introductory Contributor


Joined: 13 Apr 2015
Posts: 4

PostPosted: Mon Jun 29, 2015 7:16 pm    Post subject: Reply with quote

Well my ears must be rubbish as I couldn't tell from listening. It was only when I used software and a mic to check the response that I noticed the decline after 13k.
Back to top
View user's profile Send private message
avnewbee
Introductory Contributor


Joined: 13 Apr 2015
Posts: 4

PostPosted: Mon Jun 29, 2015 7:23 pm    Post subject: Reply with quote

What would be the characteristics of the caps needing replacing?
Back to top
View user's profile Send private message
SaSi
Senior Contributor 200+


Joined: 24 Aug 2008
Posts: 223

PostPosted: Mon Jun 29, 2015 7:33 pm    Post subject: Reply with quote

As the capacitors and inductors tune the crossover at a frequency around 1-2kHz, I would guess any drift in their values affects the crossover frequency range in the form of dips or bumps and not the upper end of the frequency range.
Back to top
View user's profile Send private message
avnewbee
Introductory Contributor


Joined: 13 Apr 2015
Posts: 4

PostPosted: Mon Jun 29, 2015 7:44 pm    Post subject: Reply with quote

Thanks. I'll check again when I get a chance and post a graph, see what you think. Regards
Back to top
View user's profile Send private message
speakerguru
VIP Contributor 750+


Joined: 18 Nov 2005
Posts: 959
Location: Green Hut, Tovil

PostPosted: Mon Jun 29, 2015 10:54 pm    Post subject: Reply with quote

Measuring at HF is tricky. How sure are you of the mic response on and off axis?
Back to top
View user's profile Send private message
willem-57
Senior Contributor 200+


Joined: 18 Jul 2014
Posts: 218
Location: Netherlands

PostPosted: Tue Jun 30, 2015 9:04 pm    Post subject: Reply with quote

Maybe a stupid reaction, but are the tweeters still 100%? I could buy a T33A for a very low price, but the dome had became loose from the rest of the tweeter. You could only see it when you unscrewed the faceplate.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SpeakerTalk Forum Index -> KEF speakers All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group