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I believe I've solved the 105.2 bass problem....Vifa!
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proffski
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Joined: 22 Aug 2003
Posts: 1297
Location: Tewkesbury UK

PostPosted: Wed Dec 21, 2005 3:38 pm    Post subject: Reply with quote

I have built a few valve amplifiers in my life, try swaping a decent bottle for some nasty diodes and have a listen... Hmm.

I am contempalating after Christmas on a new subwoofer project, current setup is an array of B139s and B139Bs. Ok on organ music, but having heard better, (sadly) very ponderous and slow elsewhere.
Hi Fi, hobby or curse? Smile
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qguy
Intermediate Contributor 75+


Joined: 08 May 2003
Posts: 85

PostPosted: Wed Dec 21, 2005 10:56 pm    Post subject: Reply with quote

Actually it might be the solid state rectifiers that gives the kef 105.2 punch and speed.



proffski wrote:
Replace the Solid State Rectumfriers with a decent bottle!
Then listen to the system realy take off!

Rectumfrier Diodes in a valve amp? Aargh.... Shocked NASTY!!!
Horrid noisy non lnear etc...
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proffski
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PostPosted: Wed Dec 21, 2005 11:23 pm    Post subject: Reply with quote

Hmm, all those extra odd order harmonics work wonders!
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adam_audio
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Joined: 07 Jul 2005
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Location: Land Of The Lost

PostPosted: Fri Dec 23, 2005 1:06 am    Post subject: Reply with quote

proffski wrote:
I have built a few valve amplifiers in my life, try swaping a decent bottle for some nasty diodes and have a listen... Hmm.

I am contempalating after Christmas on a new subwoofer project, current setup is an array of B139s and B139Bs. Ok on organ music, but having heard better, (sadly) very ponderous and slow elsewhere.
Hi Fi, hobby or curse? Smile



Try this Vifa woofer I'm talking about here. There are loads of people claiming it makes a superb sub. The Vifa is NOT slow like the B139.
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adam_audio
Intermediate Contributor 50+


Joined: 07 Jul 2005
Posts: 53
Location: Land Of The Lost

PostPosted: Fri Dec 23, 2005 1:07 am    Post subject: Reply with quote

qguy wrote:
Actually it might be the solid state rectifiers that gives the kef 105.2 punch and speed.



proffski wrote:
Replace the Solid State Rectumfriers with a decent bottle!
Then listen to the system realy take off!

Rectumfrier Diodes in a valve amp? Aargh.... Shocked NASTY!!!
Horrid noisy non lnear etc...



I can assure you that not even solid state rectifiers give the B300B punch and speed. Not the valve units I've tired, anyway.
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