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Old 15th November 2010, 02:33 PM   #1
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Join Date: Jul 2008
Location: 10,000 lakes
Default FS: DIY B1 Preamp

DIY B1 preamp using Nelson Pass DIY B1 board with very high quality parts (Caddock MK132 resistors, input capacitor is 1uf Mundorf MKP capacitors bypassed with a 0.01uf Vishay/Roederstein MKP1837, dual PEC volume pots, and output capacitors of 1uf Obbligato Gold type/ ASC 10uf. It also has Nelson Pass tested matched Jfets installed. $175 + Shipping

http://www.audiocircle.com/index.php...=view;id=50134
http://www.audiocircle.com/index.php...=view;id=50135
http://www.audiocircle.com/index.php...=view;id=50133
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Old 16th November 2010, 12:43 AM   #2
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Sold. Thanks
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Old 16th November 2010, 02:29 AM   #3
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Location: Victoria, Australia
It has been asked: can the B1 power headphones (HPs). I tried mine and Yes the B1 will power HPS. But because it is a source follower you lose about 15% of the input signal.

I have 33ohm Audio Technica Airs and the B1 drove them OK but at a low volume level. Not so low that you cannot enjoy the music but just low.
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