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Old 14th December 2002, 05:54 PM   #1
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Default Which amp for Jordan JX92S Tline ?

Hello to all tube specialists,

whet would you recommend to drive a pair of Jordan JX92S (88db) based transmission lines ( similar to Carolina Audio or Konus ones, with some mods that doesn't in my mind affect their relation to the amplifier ).

regards,

François
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Old 14th December 2002, 06:44 PM   #2
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Default WHAT AMP?

Hi Founzie,

I think that what is said here could also apply to your speakers and amp requirements.

http://www.diyaudio.com/forums/showthread.php?s=&threadid=8578

There is of course plenty to choose from.
If you do not want build from scratch you may be interested in looking at the secondhand market in France.
An Ampliton or Yves Cochet for instance would drive your speakers nicely and with a bit of tweaking can still hold their own to this day.

Ciao,
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Old 15th December 2002, 05:51 PM   #3
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Is a 6W single ended enough for a 88db speaker or is a 15W push-pull recommended ?

My room is 4x4 meters but open on one side to a 4x10 meters room (makes a "L").

On my old technics (class H+, 2x100W), the volume control is between 1/4 and 1/3.

regs

François
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Old 15th December 2002, 08:39 PM   #4
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Default WATTS

Hi,

I would even go for more than just 15 Watts in PP.
If you go for too little power your amps will clip and you won't have great dynamic range (lack of headroom).

Cheers,
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Old 21st December 2002, 12:19 PM   #5
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Can anyone send me the URL of a kit maker for a 30W tube amp (KT88 ?). I'm looking for a stereo one with buit in power supply, no integrated preamp.

Seems 15W may be not enough for a 88db speaker.

regs

François
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Old 21st December 2002, 01:33 PM   #6
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Default KIT

Hi Francois,

In France or globally?

Here's is one not too far away from home:

WORLD AUDIO DESIGN

Ciao,
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Old 21st December 2002, 02:34 PM   #7
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Quote:
Originally posted by founzie
Seems 15W may be not enough for a 88db speaker.
15W isn't enough unless you use them like headphones.
15W (or 11.7dBW) gives you 100dB SPL at 1m (90dB at 3m) at clipping. 80dB SPL <i>average</i> is a moderately loud listening level, so 15W only leaves you 10dB for peaks in the music, where IMO 20dB is a minimum or else the music will sound compressed.

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Old 21st December 2002, 05:31 PM   #8
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World Audio has two kits :

one with EL34s (32W per channel)
one with 6550, KT88 compatible (40W per channel)

Both are UL Push-Pull

The second is 20% more expensive.

Is it more reasonnable to go to 40W or is 32W already enough for my 88db speakers ?
Seems to me those are great powers for tube amps...

François
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Old 21st December 2002, 05:35 PM   #9
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Default EL34/6550

Hi,

I would prefer the one with the 6550 personally.
Not just for the extra wattage,I just prefer the sound of the 6550.

Cheers,
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Old 30th December 2002, 05:57 PM   #10
316a is offline 316a  England
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Hello ,
I use a SE 6C33 SRPP amp to drive my Jordan JX92VTL , about 10 watts a side . Similar sized room , I use mine in my 10ft x 10ft workshop . The only problems I ran in to : not enough treble over 10kHz (too warm) . Have added ribbon and currently piezo array (4 per side) tweeters . Also I ran my amp parafeed with self bias for a while : not good , changed to fixed bias , ok . Need fairly good damping to tame these fairly reactive tl's . Yet to try with a push pull amp but would expect far better bass , which is already good !

316a
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