at last this cayin can find now in taobao for i can say very good price maybe the best price performance in its price range
i have some curiosity for you Andy
1. why the tube is place in the dac , not the iah6, isnt the effect of tube can more be heard if it inside the iah6
2. i cant see any 6.4mm or 3.5mm jack output , only balance type .so no 6.4mm or 3.5mm at all?
When we design the combo, we set the goal to match up as many headphone as possible, to do that we need to accommodate TWO factors: capability to drive headphone with wide range of sensitivity/impedance/current/damping factors, and tonal characteristic to match with versatile headphone selection, from the darker HD650/LCD to the brighter HD800/HE6. After a lengthy study and listening test, we decided to go for a DAC with versatile choices of timbre (2 output stage x 5 digital filter), and a headphone amplifier that can offer several voltage and current combinations (2 current mode x 2 gain selection) for headphone load. That's why we put tubes in DAC instead of headphone amplifier.
In fact this is not the first time we go for this approach. If you check out the CDT-17AMK2 CD player from Cayin, you'll notice 4 x Amperex6922 in the output stage of the CD player, the iDAC-6 simply inherit the techniques and tradition of Cayin's HiFi product concept.
(Photo from hiendy. com/hififorum)
Last but not least, one of the design objective for the iDAC-6/iHA6 is to enable trouble free music appreciation for all sectors including the non-audiophile users, so product stability is a big concern. Cayin will have a few tube headphone amplifiers down the road, but for a more life-style based product, we think Solid State headphone amplifier will have some practical advantages.
iHA6 has two 6.35mm headphone output, marked as low and high impedance on the front-panel. The XLR socket in iHA-6 are XLR/Phone combo socket, that's the only way to squeeze a complete headphone output interface on a small panel. Please check out John's (Project86)
iHA-6 thread, he did mentioned using the single ended output from iHA-6, and you can find the specification of iHA-6 as well.