FS: Headphone OTL tube amp, includes Sennheiser HD-580
Feb 27, 2007 at 7:35 PM Thread Starter Post #1 of 4

Crowbar

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The amp is the optimized Morgan Jones design from headwize; yes I built it. Tubes are three 6DJ8--two gain stages, phase splitter and PP-output. Volume control is one of the low-cost Chinese stepped attenuators that were labeled as fake Alps... Ground loop breaking circuit, choke filtered power supply (CLCRC), bypass capacitors are Solens. Exterior is wood and copper; bottom is clear acrylic. Works good with 32 ohm, but as it's an OTL amp it's at its best with high impedance headphones, like the included HD-580. Selling these as I'm moving to electrostatics. This set has about 200 hours of use on it. Would fix any problem for free. Vancouver buyers preferred! Asking $300 Canadian ($270 US) total for the set.
 
Feb 28, 2007 at 12:40 AM Post #2 of 4

Crowbar

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Oops, forgot to mention the price was in Canadian. $270 in USD.
 
Feb 28, 2007 at 7:51 AM Post #4 of 4

Crowbar

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Yes. You might wanna put a smaller feedback resistor though. No soldering required, I used a socket, just pull one plug in another one. Currently 100k which works great for the 300 Ohm HD-580 included with it.
 

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