I am writing this with regards to the newly released Ultrasone Pro 2900, balanced version. It is my intent to dissuade you from carrying this particular model of headphones from Ultrasone. Please consider the following reasons.
1. The original unbalanced Pro 2900 can be balanced by aftermarket cable companies who also carry Ultrasone headphones, at below the $250 MSRP price increase of stock balanced Pro 2900 over stock unbalanced Pro 2900. For example, Moon-Audio sells a 2x3-pin xlr balanced Pro 900 with blue dragon cable (4x24 awg 6N OCC copper) at $725, while retaining full manufacturer warranty.
2. A DIY'er can balance an original Pro 2900 at less than $25 in cost of parts and shipping, but lose warranty doing so. It is easy and not time-consuming to balance these headphones.
3. Balanced headphone users are a small percentage of the headphone market, and they are more knowledgeable than average. A good percentage of people who use balanced headphones are aware of the fact that very little cost should be involved in balancing headphones, certainly not costing anywhere near $250.
4. Neither the cable nor connectors used in the balanced Pro 2900 have been described as anything more than stock quality. Many audiophiles who go so far as to use a balanced setup, believe in the importance of high quality cables, and minimal ground points. The stock balanced Pro 2900 uses a detachable cable mechanism which adds one additional connection, and the stock cable is merely ~28 awg and ten feet long, which some audiophiles who believe in cables would consider too thin and too long, far from ideal. Also, Ultrasone connectors are not easily or cheaply obtained, so if people wanted to make their own cables to use with the dual-entry Ultrasone connectors, they likely would have to circumvent the connector mechanism.
5. If Ultrasone does not lower the price of the balanced Pro 2900 in half, or if retailers do not keep their price of the balanced Pro 2900 within $125 of the unbalanced Pro 2900, I will be offering Pro 2900 balancing AT COST. The percentage of audiophiles interested in balanced setups is small, and I intend to take away as much sales of balanced Pro 2900's as is practical for me. The cable I use will be of far higher quality than the stock cable, and I will offer multiple cable types AT COST. I will offer multiple variations of balancing, and include multiple termination cables AT COST. The cost in parts balancing a Pro 2900 using superior quality parts than in the stock balanced Pro 2900, will be less than $20.
You can read more about my protest against Ultrasone exorbitant pricing of the new balanced Pro 2900 in the following links.
http://www.head-fi.org/forum/thread/513756/why-is-pro-2900-balanced-250-more-expensive-than-single-ended#post_6945795
http://www.head-fi.org/forum/thread/513899/doing-pro-2900-balancing-at-cost-for-head-fiers-need-startup-advice
I ask you please not to carry the balanced Pro 2900 until the price is made more reasonable, it sets a very bad precedent for headphone manufacturers, and is insulting to customers.