blippster

As dennis suggested, it's likely a pot issue. A good place to start would be the solder pads there under the board, make sure that the pins aren't shorting together. Pictures might be helpful.

For the pot shaft facing you, 1 2 3 4 5 6 1/4 - ground 2/5 - out 3/6 - in Use your meter to check the jacks.

The project comes to a close

Still waiting for RS to deliver the case so I can make comparisons, but so far AMB's dimensions vs. the downloadable .pdf drilling template seem to be about 3% off Not too sure where we can find the people who can do this, since it involves both cutting and (I assume) engraving. Looking at the shops that cut Al for PC case modding and the like, but that will probably take some time unless I feel rich and decide to order from FPE.

Layouts done in FPD, based on AMB's dimensions, 2mm panel thickness. Don't think I'll be upgrading my y1 to Full++ configuration, hence the lack of the digital outputs on the front. Have yet to verify this set of drawings though. Don't know what the cost for fabricating the panels is locally, but FPD is quoting 42 USD per set, dropping to 33 USD per set shipping exclusive for 10 of each. There's a smaller price break (10% instead of 20%) for 5 each. Prices are without in-fill, so you'll have to DIY the fill for the engravings with a crayon - but that does save about 10 USD per set. mouz, if these would be helpful let me know and I'll send you the files in .fpd or .pdf (don't know which would be more useful, sorry)

Itchy hands For context, my y2 is using the WM8741 with OPA2365 for the output filter and Nichicon KW/Wimas for the output capacitors. My y1 was built with Muse/Wima output caps. From what I've heard so far, its definitely a step up in refinement. The improvement isn't strikingly obvious, but after some listening I think there's better imaging and smoother mids and (especially) highs. I found the y1 slightly harsh on some systems, but don't think that will be a problem with the y2. Background is quite silent, even running directly out of the y2. Some build notes for those who haven't yet started: - it is possible to short to the case of X1 when soldering on to the SMD pads; only pin 2 (ground) is supposed to be a dead short. might want to consider using the resistor leads to add little legs to the crystal to fit the through holes (although I don't know how that affects performance) - try very hard to ensure the WM874x is well soldered before populating surrounding components. mine almost didn't make it through the couple of reflows the SRC4192 is much more accessible in comparison - digital filters seem to make a slight but not very significant change in sound, so the switches might be left out to save money if you have a chance to compare them before hand and choose which you prefer most. - of the small ceramic capacitors, all have the same value except C2 & C5 - and they look the same aside from the last printed digit. mixed 1 of them up there, was quite a pain to try to rectify Overall, the y2 is one of the better DACs that I've heard, no regrets going for this one

Casing still on order from RS, so the y2 is still naked. The y1 faceplates are now extra for me, so if anyone's looking for them drop me a PM.

Got the y2 up and running now. Thanks again to heady for organising this.

Sounds good. Enjoy your chicken rice

The case is in their extended range, so not sure what exactly that means other than the longer wait time. I ordered some other ER parts around the same time and still haven't seen anything of them, so it may not be too uncommon. Think you can email the address at the top of the confirmation they sent if you'd like to check up on it though. (Mouser put my shipment on backorder for a sudden out-of-stock part without telling me, until calling them directly managed to clear things up)

Interested in one set, especially if they're in aluminium

RS Singapore has the case for even less. http://singapore.rs-online.com/web/search/...rm=box+B2-080BK No minimum order for free delivery locally to boot.

I posted that before you added yourself Nevermind, like you said, the more the merrier - we're well on the way to hitting that MOQ for the cases. That's excluding the components that need to be ordered from Mouser. Total should be about 300-400 if you're building from scratch.

Currently the list stands at 9 people. If it hits ten orders for the case there's about $4 saving a piece ($28.07 -> $24.06) from Farnell, but all must be of the same colour.

I'm in for one y2 set please! I may be able to help order 1-2 sets of the Mouser y2 components, if that would be helpful.

My changes to the parts list: Farnell U2:1470478 - TPS79333DBVR (standard part) U7:1363691 - OPA2365AID (standard part) R5,R7,R12,R14: 9342788 - MF12 2K resistors (available from Mouser as well) Mouser (all AMB-spec'd alternate parts) SW2: 108-2US1T1765-EV - Ultra-Miniature Toggle Switches SPDT ON-ON VT RT ANG SW1: 108-2US3T1767-EV - Ultra-Miniature Toggle Switches SPDT ON-OFF-ON VT RT C11, C13: 647-UES1E220MEM - Nichicon 22uF 25V Just realised I forgot to order the y2 case from Farnell. Thankfully its close enough to the $30 mark that won't need to order too much extra stuff to make up free delivery.

np mouz, all based on the good work you did that's my plan for now, moolah is in short supply..

Some updates if anyone else is going to order soon, since I've ordered the first set of parts for the y2-only board. Not everything in stock at Mouser, and the 3.3V regulator has a lead time of 20 weeks. Output caps also have a long lead time, so switched those to Muse Bipolars for this order. The 2Kohm resistors aren't in stock either, so used the alternate from AMB's site; same for the front panel toggle switches. In the end ordered the TPS79333DBVR and OPA2365 from Farnell instead, since they have it in stock there.

@mouz: Thanks for the Mouser BOM Could you clarify two things? - AD8656 is spec'd for headphone direct drive, but not available from Mouser. OPA2365 is for line driver. - 649-68786-202LF shut connector is for JP2-[1-4]? AMB writes that that only needs to be populated if ASRC isn't used Everything else checks out though, many thanks

Thought AMB's current Mini3 plates are fab-to-order, which would explain the high price. I expected the y1's initial price to be much lower.. So now - order with the GB, or wait for the local?

Think you can get them off ebay or the official Koss website

Would be interested, but more info please

adn6244, I found the same problem with the vocals disappearing on one I assembled on a bare board. Managed to solve it by grounding the input/output jacks properly. Just a thought, you might want to check those areas especially, out of everything heady mentioned.

thanks heady the e3s are 26ohm, with the mylars at 16ohm and the creatives presumably less than that, so i suppose it's the second case.. now the noise seems to be mostly when turning the pot (but again, only for the shures - the rest work fine) will try resoldering the pot in and see if that settles it..

yup seems like it.. i'm inclined to think it's an impedance issue, but no idea how to resolve it.. =\