Cobaltmute's new GrubDAC was originally designed in conjunction with Joneeboi's new Carrie USB-powered portable amp. However, it has all of the same uses as the BantamDAC - stand-alone, CableDAC, Millett MAX and MOSFET-MAX. The PCB's have been shipping for awhile and we hope to have kits available soon, so perhaps a step-by-step build thread will prove useful. To many of you, SMD soldering is something new and perhaps a little bit scary. However, with the right preparation and strategy, you may find it easier in some respects than through-hole soldering. Like any Do-It-Yourself exercise, success depends a great deal on proper preparation and tools. SMD has some special traits that make a few tools (one in particular) absolutely necessary. Here's a list of things you may want, with the first couple almost a necessity: tweezers flux pen helping hands small-diameter solder small-tip soldering iron Tweezers cannot be over-emphasized. Without a good pair, I have trouble imagining how manual SMD-soldering can even be accomplished. Get a good pair! I use a pair of ESD-safe, bent tip tweezers that I bought at Fry's, but all the good DIY-suppliers have them in stock - Mouser, DigiKey, Allied, Newark, etc. Here's the pair that I use: Another device that you may find useful is the flux pen. The flux goes down as a thick liquid and gets sticky very quickly - almost sticky enough to hold a part in place. The pen form lets you apply the flux where you want it, even on a very small SMD PCB. I like Kester and stick with their products. The one I use is the Kester #186. It contains regular activating flux that works great (no water-soluable or no-clean flux for me). Finally, and this varies with the individual, I use a Hakko 936 soldering station, set at 325 deg.C. with a 0.8D chisel tip - 900M-T-0.8D. This is a half-size chisel tip of the standard tip that comes with the Hakko 936 (900M-T-1.6D). Solder is the same solder that I use for all my DIY stuff: Kester 44 eutectic, 63/37, 0.025" diameter. Larger is too big for SMD IMHO, and smaller stuff breaks all the time. Be sure to review the GrubDAC website and please check out Tangent's excellent tutorial on SMD soldering: http://www.tangentsoft.net/elec/movies/tt03.html .