Hi,   I'm now using it with 8 x OPA627 (filters and I/V conversion). Sounds excellent (the bass is much better) ! The soundstage is smaller than with AD 8066s and the detail grade might be somewhat reduced. However, the best combination I have tried. This upgrade was worth the investment...

Hello,   i recently received some OPA 627 APs. Does someone know if these are legit?  This is what they look like:   I would be very grateful, if you did let me know what you think about these opa627. Thanks!

Hi, are you using them in combination with the 8066? If not you should give them a try as i/v converters. Its amazing how the 8066 improve the performance over all the other opamps i have tested so far.

Hi,   I'm using the 8066ARZ. I had this problem too (independent of the opamps i were using). I changed the crappy power cable to overcome this. The dac still needs one or two seconds for recognizing the source. However there are no problems afterwards. Maybe the stream you are feeding to...

Actually, you will need four of these (two for filtering - the two on the left- and two more for the I/V conversion - the two on the right). Let us know, if you can confirm my impression about the sound with these opamps (you should give them about 30- 50 hours "burn-In" or...

i tested a lot of different opamp combinations with the line outs the last weeks (I'm using the smk-iii as a dac). The opamps i tested were the op 275, opa2604, opa2134, ad823, and ad8066.   First of all, the hlly smk-iii (mod) already provides a good sound out of the box and is quite worth...

Hi,   i received some ad823 two weeks ago and had a lot of time to test them. Beside the already mentioned op275 + opa2134 combination a combination of op275 + ad823 as well as a combination of opa2134 + ad823 is worth a try (the first mentioned combination is more lively, but somewhat too...

David,   which chip and which opamps will the hlly smk IV use?

I'm still testing the smk III (Mod) with different opamp combinations. I tried all possible combinations of opa2604s, op275s, and opa2132ps. My favorite so far is a combination of op275s as filter and opa2132ps for I/V (larger soundstage, somewhat darker but still very refined bass and more...