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If I put my notes here, I might be able to find them again later!
47 Labs Treasure 0247 "Treasure" series preamplifier with USB

Other options for a headphone amplifier.

Posted 15th December 2011 at 01:02 PM by rjm (RJM Audio Blog)
Updated 15th December 2011 at 01:08 PM by rjm

While I wait for the guys at 47 labs to get the Treasure 0247 together, I took a look around at some of the alternatives.

The Yulong D100 looks quite attractive and for about 2/3 the price of the 0247 kit you get a fully assembled unit!

review at head-fi

Or if you can do without a DAC, HLLY audio has your standard "transistor buffered op amp" implementation in a no-frills case:


It's listed at $240 but for sale on eBay for only $99 right now.

Of course there are dozens, but I single those two out as being particularly deserving of "honorable mentions". I'm still set on the 0247 though.
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47 Labs "Treasure" Model 0247 DAC/Headphone/Preamplifier

Posted 14th December 2011 at 05:56 AM by rjm (RJM Audio Blog)
Updated 17th December 2011 at 01:36 AM by rjm

Just placed my order for this. I am customer no. 00028!

47 Labs web page

I figure I owed it to them. 47 Labs has been good to me, and the DIY community over the years, one way or another: gainclone, phonoclone, even the DAC-of-the-Klones.

Besides, several reasons:

1. I really want to finally hear 47 labs gear, instead of trying to reverse engineer it all the time!
2. It will be interesting to compare it against the sapphire amp.
3. I'm sure it will be fun to build and examine up close.
4. It's my Christmas present.
5. And hammertone. Finish a audio product in grey, or even better, green hammertone, and its as bees to honey...

Will blog the unboxing, building, and testing right here.
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