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KT150s in a Preamp Design?

I'm a bit of a shade tree tube amp mechanic;  I'm no expert and have a decent but not comprehensive knowledge of design.  Can someone tell me what's going on with this tube preamplifier design?  I've never seen KT150s in a preamplifier!

http://www.thebestamp.com/Tube_Pre-Amps/Reference_Series/Reference-3.php

Calling Atmasphere!  
128x128jbhiller
jbhiller's avatar
jbhiller OP
1,437 posts
 
Got it.  That makes sense.  I'm wondering what the sonic benefit would be.  Seems that 6SN7 would be big enough.  A KT150? My lord!
noromance's avatar
noromance
9,888 posts
 
My phono preamp uses 7581A 35w power tubes in the power supply. The big supply gives more depth, space and air to the soundstage.
invalid
1,211 posts
 
I have a preamp with a separate power supply made by the company you posted the link to.  Noromance is right, my power supply can use two 866a Mercury tubes it made a big difference from the stock 274b tube that came in the preamp. The bigger tubes also make a big difference in the amplification stage in the same way, even in a preamp. The guy who builds these has excellent feedback on cunuck audio mart.
jbhiller's avatar
jbhiller OP
1,437 posts
 
Hey Noromance, what is the make/model of that phono stage?  Sounds interesting. 
jond's avatar
jond
5,874 posts
 
What's really crazy about that preamp is the number of tube types it can take!

KT150 (can also use VT52 / CV1052 / 6G6 / 6V6 / 6K6 / 6Y6 / 6F6 / 6L6 / 6550 / KT66 / KT77 / KT88 / KT99 / KT100 / EL34 / 5881 / 6CA7...etc direct plug-n-play ), which give superb dynamics sound with extremely good bass control . Rectifier tube use 3B22 (can also use 1616 / 866A / 836 / 3B27 / 3B28 / 2A3 / 300B / 572B ..... with 4 pin to 8 pin converter can also use 5U4G / 5AR4 / 5R4 / 53KU / GZ37 ...etc,
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