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Gieseler Audio

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Everything posted by Gieseler Audio

  1. Item: GIESELER 3 input Gross DAC with built in Kraftwerk Gold Tune PSU - New Location: Gold Coast Price: 2000.00 Item Condition:new Reason for selling: discontinued model Payment Method: Pickup - Cash, Paypal, Direct deposit Extra Info: Includes courier shipping Australia wide This is the very last Gross DAC I have manufactured. It actually has a full Kraftwerk Nichicon Gold Tune PSU built in. It was going to be the "Gross II" but was so similar to the Fein II I decided not to go ahead with it so this is the only one ever built. Full info & specs here. https://www.gieseler.com.au/product-page/groß-dac This is a brand new unit, not demo & will come with the full two year parts & labour warranty. It represents excellent value as the 3 input Gross sold for $2350 + Kraftwerk Gold Tune PSU is $450 so equivalent to $2800 worth of DAC & PSU. The Amanero USB board has the latest 2006be10 firmware so perfect DSD512 playback on Linux & Windows servers. The DAC is also running the latest firmware & now has S/PDIF auto mute. The remote control is the newer version so better range than the old model. Payment Direct deposit or PayPal. Shipping is included & will be via courier Australia wide. Photos: Advertisements without photos of the actual item will not be approved.
  2. It is probably best to check with Kingwa at Audio GD. With my DAC's we sometimes have to fine tune the DAC firmware to Amanero & that can change with Amanero firmware changes.
  3. Sorry on hold at the moment due to work load. Check out Academy Audio as they use the Muses chip in their kits https://www.academyaudio.com/diy-products
  4. No - the current limit is mainly a safety feature so the designer of the PSU can the limit the maximum current the PSU can supply at the specified output - 24v in this case. The regulator has a internal current limit of 2.4 A but that is really pushing it so that’s why I limit it to 2A. The transformer is rated at 3A max (AC) so the max DC will be less so by limiting the max current to 2A nothing will ever be over stressed & the transformer will never overheat. Check out the data sheet on the regulator I use. https://au.mouser.com/datasheet/2/609/3086fb-1265782.pdf It’s has an amazing number of really useful features as well as low noise. Around $12 a pop so you would normally only see it in premium products.
  5. Yes Andy - correct it will be very lightly loaded but but remember I am using a precision Analog Devices regulator to set the output voltage to 24v. It will maintain 24 v from no external load up to 2A at which point current limiting cuts in. The LT3080 which I use actually has adjustable current limiting so I set it to 2A - clever little thing isn’t it? They are virtually bullet-proof with thermal cutout and short-circuit proof as well. It’s a shame they are so expensive! With a 24v AC input from the transformer I actually end up with about 34v raw dc into the regulator so there’s plenty of headroom.
  6. Hi Andy - yes if I use a .9A 24v Ac adaptor instead of the 3A 24v nice potted transformer I save a whopping $20 https://www.altronics.com.au/p/m6014-powertran-ip68-24v-ac-3a-appliance-transformer/ https://www.altronics.com.au/p/m9379a-powertran-24v-ac-0.9a-appliance-powerpack/
  7. Hi Andy & thanks for the enquiry. 1. Yes Kraftwerk is the name for the new range of PSU's https://www.gieseler.com.au/product-page/m18psu-kraftwerk 2. Yes no problem with doing a 24v version. I have actually built a few 24v versions so I will make it a permanent model. They have actually been for phono stages too & the owners seemed very happy. Current rating would 2A. 3. Currently I only have the PCB's for the standard version but that is a good idea to offer it in a Nichicon Gold Tune version as well. I will get some Gold Tune 24v version PCB's with my next order - very soon. Costing would the same as my 12v 4A range as the parts are essentially the same so. Standard version $375 Gold Tune $450
  8. Just found some internal photos of the latest build - Fein II 3 - input Notice the nice Nichicon Gold Tune capacitors for the built in Enhanced Kraftwerk PSU. Also the nice chunky Jensen output transformers.
  9. Check out the 10k sine wave - maybe that unit was faulty.
  10. Hi Brian, try asking kipeta directly about the problem, he is usually pretty helpful. https://www.daphile.com/#contact
  11. Digikey have finally listed the AK4499EQ https://www.digikey.com.au/products/en?keywords=Ak4499 $129 Ouch! ETA 5th of September
  12. Hi Lodovico, Audio GD build there own version of the Amanero board & the pads you have to short to erase the firmware are in a different location to the Amanero instructions. The correct info is here http://www.audio-gd.com/Pro/dac/Amanero/AmaneroEN.htm Good luck - Cheers Clay
  13. Yes the NDK NZ2520SD’s have the enable pin but like you mentioned are extremely small & difficult to work with. The connection pads on the bottom are recessed from the edge so the only way to solder it on a board is with solder paste & a heat gun -carefully!
  14. Yes unfortunately other wise I would be upgrading the Amanero clocks to the Crystek CCHD 575 clocks. In the Genuine Amanero board the two clocks are permanently connected to the 3.3v rail & then the CPLD chip sends an enable signal to whichever clock is required. This type of clock uses “try-state” logic so if it connected to power but the enable pin is low the output is high impedance. It is a very handy feature in a dual clock setup as you can just parallel the clock outputs & just enable the one you want. The CCHD 575 does not have this feature - just Vdd, Ground & output - dam shame.
  15. Yes the CCHD 575 clocks look very good but they don’t have a standby/enable pin like the original Amanero clocks so they are not a drop in replacement.
  16. Hey thanks for the detailed reply Gordon. The Amanero clone looks really nice. I’ve been playing around with clocks lately and those Crystek units perform really well. I’m even thinking again of making a USB to I2S board based on the Xmos chip. I been doing some tests with isolators, reclocking, clock buffers etc & feel pretty comfortable with it all now. Unfortunately it would cost a bit more than the Amanero clone. I’m sure if you moved away from S/PDIF to I2S you would get a noticeable audio improvement. The Singxer F1 actually uses a dc to dc converter to run the back end (eg the S/PDIF chip) so not the best. Anyway I think that the DSC1/2 is an excellent design especially coupled with the AK4137 like you have. Well done!
  17. Hi Gordon, well what was the final outcome? Did the replacement Amanero get the PC input side of things working & how did it sound vs the CD transport input? I’ve actually ordered some of the Chinese 10k/10k transformers so it will be interesting to see how they compare sound wise to the Jensen’s I use.
  18. Hi Matt, I have been following that thread with great interest. The evaluation board looks massive! - I have a feeling it is probably $1000+ AKM referred me to Arrow Electronics for the evaluation board but it doesn’t seem to be showing up there yet so I don’t know where Markw4 got his. Anyway I finally got my own evaluation board yesterday and and I’m just waiting for a few more parts to finish it off. It is a very basic evaluation board that I designed mainly to get an initial operation up and running and test out control codes. It was a bit of a challenge soldering the 128-pin HTQFN package - super fine pin pitch. Anyway I should have it finished next week so it will be very interesting with the first testing process.
  19. Yes Orange Squeeze https://play.google.com/store/apps/details?id=com.orangebikelabs.orangesqueeze&hl=en_AU
  20. RE high low gain setting on the Fein II I just been listening carefully to a few different tracks & I think the "high gain" setting actually sounds a bit better. It's hard doing a accurate compare because the volume level changes but the high gain setting seems a little fuller, slightly less sibilant & smoother. Anyway I just thought it would mention it & it might be worth doing a comparison yourself & see what you think. Technically I'm struggling to work out why there would be a difference but maybe the higher gain setting is changing a few parameters around the internal op-amps which possibly results in a better match with the output transformers.
  21. For Android users Orange squeeze is pretty good too. https://play.google.com/store/apps/details?id=com.orangebikelabs.orangesqueeze&hl=en_AU
  22. Hi - yes I did try it a while back with a Raspberry Pi setup - I did not like the very basic web base remote vs the iPeng app which is very feature rich with lots more options. From memory the sound was fine.
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