SOLD
Up for sale is the B22 that I purchased not long ago from this thread on HF: AMB Ballanced B22 & B24 Amps for sale - Head-Fi.org Community
Its a two box B22 w/ 4 channels and 2 sigma 22 power supplies. Its entirely balanced output as you can see in the pictures w/ two 3-pin xlr's and one 4-pin xlr output. So no single ended here and you'll also need balanced input into the unit as well. Additional pics can be found on the original FS thread on HF. The amp is set to a high gain, which the builder did not specify exactly what, but when using a sensitive headphone like the R10 there is noticeable hiss. So I would not advise anyone who plans on driving very sensitive headphones to get this unless he/she can lower the gain themselves or find someone to do it for them. When I had the K1000's in the house, it was dead silent and drove it with authority and plenty of gain. So less sensitive headphones will be perfect to use right out of the box.
Letting go of an amp this nice for the price I got it for definitely saddens me and was not part of my plan, but my reason for selling is that the only dynamic headphone I own is the stock Sony R10 and I just don't have the guts to re-terminate this perfect condition headphone. As well as also having to lower the gain of the unit in order to use it with the sensitive R10.
Price is the same I bought it for(which is a silly price for an amp like this), $1250+shipping and PP. If you want to avoid PP fees you can send as gift for an even amount or send two Postal Money Orders. The shipment will include the two cords that connect the amp to the powersupply but will not come with a powercord.
Here's a couple of my own pics and as you can see its in very nice condition:
