purifi

  1. D

    VTV Hypex NC252MP or VTV Purifi Eigentakt Eval-1? Which is a better fit for me?

    Hi there, Merry Christmas! Came into some Christmas money so am about to pull the trigger on one of these amps, but need a little advice first. I know that if cost were no object, the Purifi Eigentakt is an easy decision, but I'd really be stretching the budget to do so. Would I really be...
  2. A

    VTV Shipping and Duty to Canada

    I'm interested in a Purifi-based custom build from VTV. If you are from Canada, do you have any experience with their products shipped to Canada. On another note, if you are 'personally' using a new VTV Purifi-offering, how has your experience been with the product and customer service. I will...
  3. pma

    Class D must read papers and publications

    I would like to open the thread dealing with important publications on class D amplifiers principles, topologies, characteristics and limitations. One of the great sources is the Hypex publications library at https://www.hypex.nl/p/application-notes-white-papers/ The most explaining and...
  4. A

    Purifi EVAL1 EIGENTAKT Class D Amp Designs

    I'm m looking for persons who have purchased the Purifi EVAL1 EIGENTAKT based systems and any build mods. I'm looking for a Canadian Supplier with track record. I live in Canada and have only found VTV so far. I'm planning on using a VTV Purifi type amplifier as a front left and right Channel...
  5. S

    FS: Apollon Audio Purifi 1et400a Mini Stereo Amplifier *US Only*

    I am selling a nearly brand new Apollon Audio Purifi 1et400a Mini Stereo Amplifier. It was originally purchased in July 2021 and took two months to arrive to my doorstep in the US. A large portion of that was customs of course. I think everyone here is pretty familiar with Apollon and Purifi...
  6. HionHiFi

    SOLD!!!: Nord Three 1ET400A MKII Dual Mono Stereo Amplifier: SOLD!!!

    SOLD SOLD SOLD SOLD SOLD NO LONGER AVAILABLE ******************* I am selling a Nord Three 1ET400A Dual Mono Stereo Amplifier. The Nord Three SE 1ET400A Dual Mono Stereo Amp is a nicely built amplifier using the Purifi class D amplifier technology. It uses the Nord Rev D buffers with on board...
  7. C

    SOLD!!!: Hypex NC1200 Stereo Amp: SOLD!!!

    For sale is the powerhouse of Hypex nCore, the NC1200 stereo amp built by VTV in the USA. asking $1000. It’s has all the clean power you need for even the most demanding speakers. 400W @ 8ohm 700W @ 4ohm 1200W @ 2ohm This has a 12v trigger option. This unit does NOT have the pin1 issue that you...
  8. Arash

    Amplifiers based on Hypex/Purifi and maybe Pascal

    Hello guys, Actually I'm submitting this thread to use the wisdom of the crowd and hear the ideas about designing and building amplifiers based on Hypex/Purifi and possibly Pascal modules. For now, we are focusing on Hypex NC252MP to see how it will turn out. Afterwards we will work on nc1200...
  9. daniboun

    PURIFI Buffers : OPA1656 / Plug And Play Europe only

    Hi amigos, New Purifi Buffer in V2.1 is now ready with OPA1656 in DIP8 socket. The idea of this group buy is to propose a full pack @fair price for a brand new Purifi Buffer : SPEC : - THD: 0,00026% @ Vin 2,5 V RMS - GAIN: 14 dB - BANDWIDTH: 2 Hz - 150 kHz - SLEW RATE: 24 V/uS - CMRR...
  10. D

    Active Crossover Solutions / Feedback / Recommendations

    Closed - looking at Octo Research dac8 PRO, paired w. Roon + Convolution or MiniDSP.
  11. daniboun

    [PURIFI] New Purifi with custom "made in Italy" buffer, pictures inside )

    Hi amigos, Just got my new Purifi Amplifier, after all, it remains conventional. But it has a custom "made in Italy" Buffer. The Buffer involves 3 Genuine OP Amps Muse 02 + 03 (one single and two dual, I will give a test with some OPA1656 that I have in stock) The Buffer globally improve the...
  12. G

    Purifi class-D Review and Observations

    I decided to register here to discuss the Purifi modules. I recently purchased a stock Purifi stereo amp from VTV. It was noticeably better than every other class-D I've heard before. However it suffered from a really bad mid-range: blurry and artificial-sounding. Just awful. I almost returned...
  13. M

    Purifi Audio SPK5 Measurements | SoundStage/NRC

    https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=2403:nrc-measurements-purifi-audio-spk5-loudspeakers&catid=77&Itemid=153 This is a speaker design that Purifi has the free plans for on their site: https://purifi-audio.com/tech/ I see that @sgoldwin sell these on...
  14. R

    Home Theater Planning Advice - 7.2.4 Focal/SVS/Denon/JVC 4k to 7.4.6 8k Separates

    Interested in audio since college 15 years back when I was getting in trouble with a pair of Klipsch SF-3's and a SVS PC12-Plus in a dorm room. Two years ago I upgraded from a 5.1 Klipsch/SVS/Yamaha setup to 7.2.4 Focal Aria/SVS PC-4000/Denon X6400H. I would have went with bigger speakers/subs...
  15. Neto Rare

    FS: Audiophonics HPA-S400ET Amplifier Class D Stereo Purifi 1ET400A 2x400W 4 Ohm

    No longer need this because I switched over to Active monitors. This was ordered about 7 months ago from Audiophonics and its in 9.5/10 condition (see pics for details). Pics: Retail price with shipping to US: $1480 or €1299 Sale price: $1179 - Free US shipping and no Paypal fees. More...
  16. Matias

    NAD C 298 Power Amplifier With Purifi Eigentakt Amplification

    $1,999 U.S. MSRP, press release below. Variable gain knob and line out for subwoofers, nice touches! :) 2x185W at 8 ohms, 2x340W at 4 ohms. Bridgeable to 1x620W at 8 ohms. https://nadelectronics.com/nad-intros-c-298-power-amplifier-with-purifi-eigentakt-amplification/
  17. R

    Any issues when pairing Purifi or Hypex class D amps with home cinema AVR?

    I have asked to Amir what would be the ending SINAD when pairing the new Denon 3700H with a purifi amp. Please find below its disappointing answer: Well, I tried to test this scenario but failed completely. :( Hooking up the output of 3700 to Purifi using RCA to XLR adapter generated worse...
  18. sgoldwin

    Handmade copy of Purifi SPK5 design on UK eBay

    I built three pairs of SPK5 speakers close to the Purifi published SPK5 spec. I am selling two pairs and keeping one. If there is demand for this I will keep building them. Pictures, description and price on https://www.ebay.co.uk/itm/303634158293
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