Jump to content

Gieseler Audio

Commercial Member
  • Content Count

    1,109
  • Joined

  • Last visited

  • Days Won

    7

Gieseler Audio last won the day on August 31 2017

Gieseler Audio had the most liked content!

Community Reputation

2,051 Superstar

Profile Fields

  • Location
    Gold Coast
  • Country
    Australia

Recent Profile Visitors

11,997 profile views
  1. Had a listen to these the other day at Mike's. OMG - totally amazing. I'm in full agreement with Bill. The best sounding of all Mike's speakers for sure. Only one problem - the crossover is actually bigger than the speaker.
  2. I am working on some new stuff & Mr Speedy was fortunate that I had a prototype that suited the current case. The custom cases are a slow process though so still a way off.
  3. Terry Demole https://www.stereo.net.au/forums/profile/110074-zenelectro/
  4. Hey guys I know Terry rather well & have been to his place but but I almost fell of my chair when Con mentioned him building stuff. I don't think he could change a fuse - ha ha
  5. We ended up postponing the Japan trip so business as normal
  6. Hi guys, just letting everyone know I am heading off to Japan this weekend. I will be back on the 26th of February. Feel free to place order on the website but obviously I won’t be able to process them until I get back. Cheers Clay
  7. I’m not back at work until tomorrow so I will do some testing later in the week.
  8. Hi Roy, yes it is definitely something I will be looking at. Once I get back to work (on holidays at the moment) I will try some listening tests to confirm if a discreet style pre regulator in a DAC makes a difference or not.
  9. Hi Guys, hey both names sound good. I was thinking of “KD” as in Kraftwerk Discreet as it uses discreet parts instead of the usual monolith regulator
  10. NEW GIESELER ENHANCED PSU Well I thought it was time to re look at my PSU range. The current range IMHO is still competitive & up to date with current tech but I did think the Gold Tune Enhanced version could be improved a bit in terms of sound & more competitive pricing. It was a bit of a struggle to hear a sound difference between say the Gold Tune & Gold Tune Enhanced versions so the $100 price jump was not really justified. So far all my PSU’s use high quality/low noise LDO (low drop out) monolithic regulators. This is the area where the most development is happening with new regulators. Now looking critically at LDO regulators they do have one aspect that is not the best for audio quality – output impedance. To minimise the voltage drop all LDO regulators run the regulators series device (Mosfet or Transistor) in a common base arrangement, that is the collector (or drain) is the output. This gives the lowest voltage drop but also has high output impedance which is not good for a PSU. This new enhanced PSU is running the series device (Transistor) in “Emitter Follower Mode”. This gives very low output impedance but it needs more voltage at the input due to the bigger voltage drop across the transistor. Also there has been talk on some UK forums that the usual monolithic regulators using lots of negative feedback do tend rob the sound/music a bit. In light of all of this I have come up new design using all discreet components & the pass transistor is now running in “Emitter Follower” mode hence nice low output impedance. Also it is a non feedback design based on a very low noise red LED string voltage reference being fed with a constant current source. The raw DC front end of the design is the same as the Kraftwerk Gold Tune which is well optimised IMHO. It does not have the thermal cut-out, short circuit protection & huge 4 Amp rating of my other designs but these options are not normally required when running Klein/Gross/Fein DAC’s which only draw a few hundred milliamps. Does it actually sound any better? Well I have only done a few brief comparisons against a standard Kraftwerk PSU & it definitely sounds better than that. After Christmas I will try some critical comparison with the Gold Tune version & old Enhanced versions & report back. The current rating is 2A & so plenty for Klein III/Gross/Fein DAC’s. Also with the Gross/Fein DAC’s it is best to use the 16v 2.5A transformer (in photos) as they draw more current. The Klein III will work fine with the usual 12v transformer. The 16v transformer has another nice option which a direct mains earth connection so when using this PSU negative side is now at mains earth. John Swenson of Uptone Audio fame is a big fan of having a PSU negative output connected to mains ground. Well there are few SNA’s members who are already using this PSU so maybe they can add some comments. Due to the massive amount of Nichicon Gold Tune capacitors the red LED’s run for quite a while after the PSU is switched off – see photos. They are currently in stock & the cost is $500 including shipping.
  11. I would assume they will all work but I have only tested it with Flacs & waves. Make sure you install the Amanero Windows 10 driver from here. https://amanero.com/drivers.htm
  12. Andy at HiFI Repair Services is excellent, located in Ashmore so not too far from you https://www.hifirepairservices.com.au/
  13. Item: 2 x ScanSpeak 15W/8530K-00 5.5" Revelator Woofers Location: Gold Coast QLD Price: $400 Item Condition: new Payment Method: Direct deposit, Paypal or cash on pickup Extra Info: I brought these for a project that never happened. Absolutely brand new, unused & only open for photos. Price includes Express Post shipping Australia wide. New price is $600 + shipping https://www.wagneronline.com.au/scanspeak-15w-8530-k00/ps/ https://www.madisoundspeakerstore.com/approx-5-woofers/scanspeak-15w/8530k-00-5-revelator-woofer-low-qts/ ScanSpeak 15W/8530K-00 5.5" Revelator Woofer - Low Qts The 15W/8530K is a 5.5" Revelator mid/woofer. It features a non-resonant cone and dust cap structure, dynamic linear suspension, SD-1 magnet system, "Grasshopper" cast chassis with maximized air flow and resonance terminating mounting system. Less resonance in all structures, lower compression and higher linearity, faster termination of excess energy and higher sound pressure capability make the 15W have more musical and dynamic capability than any other 5 ½" we know of. Wonderful bass in a small box! · Outside diameter: 148mm · Cut out: 125mm · Depth: 71mm · 25.4mm = 1" = 2.54cm Box suggestions: 0.15 cubic foot sealed box with 20% filling for an F3 of 90Hz 0.35 cubic foot box with 1.5" diameter vent by 6" long for an F3 of 50Hz
  14. No - it is a 12v fixed regulated PSU that suits the Fein DAC. However if you want a 15v linear low noise PSU I do make one of those.
  15. Hi Matt, I'm mainly looking at a custom case as the current Fein ones require a lot of metalworking & the panel production is fairly involved & time consuming. The goal is to have nice finished cases sitting on the shelf & I can just stick to the electronics side which I really enjoy. The Klein & PSU series use a simple Hammond case that the pcb just slides into but they don't make them in a big enough size to suit Gross, Fein etc. Anyway I am going to use a big Japanese company for the custom ones & they have a good range to choose from. They also do the cases for Uptone Audio.
×
×
  • Create New...