1. K

    Purifi SPK5 Speakers For Sale

    Purifi SPK5 Rare chance to get a pair of these incredible speakers. These are nice condition, original, working perfectly. That have the upgraded crossovers. Collection from OX10, could possibly deliver by arrangement, or if you arrange a packsend service. Open to offers on PX etc. Looking...
  2. thin bLue

    Marchaudio P422 Stereo Power Amplifier Renewed Review

    After massive failure with my previous review(https://audiosciencereview.com/forum/index.php?threads/marchaudio-p422-stereo-power-amplifier-review.35969/), I got great technical supports from ASR, Speaker gallery of DC inside, E1DA Discord Channel(@IVX, @staticV3 ) and Marchaudio. (Detail for...
  3. S

    March Audio - 1ET400A - P262 135w vs P422 227w

    Hi All, Bit of a newbie here and a bit confused, and understanding that this might get a bit technical. I am looking at a March Audio. Two options are the P262 and P422, with both, based on photos, running the 1ET400A chip. The 1ET400A is rated at 227w 8 ohm from the manufactuer, and across...
  4. Eric.D

    NEW PURIFI 8'' MWoofer [PTT8.0X04]

    Purifi updated their website, the spec sheet is now downloadable, and the status of this driver is now 'new' instead of 'preview'. Maybe we can see this being tested in the future? @hardisj Imagine a floorstand/big monitor with 2x this and a well-designed tweeter :)
  5. E

    Class D Amps with good thermal control / heat sinks

    I'm going to buy a Hypex or Purifi amp, a fairly powerful stereo amp (Hypex NC500 or NC502MP, 1ET400A or 1ET704SA) I've done a lot of research and am looking at many of the usual suspects for manufacturers: - March Audio - Deer Creed Audio - Buckeye - NAD - Apollon - KJFAudio - Boxem -...
  6. K

    performance of tri-amp vs stereo amp + mono amp

    Hey forum, I'm considering purchasing a tri-amp as opposed to a stereo amp + mono. Use case is listening to music in stereo on my towers, and watching TV/movies across tower + center speakers. As a concrete example, this product was well-reviewed on ASR...
  7. O

    Sound characteristics of Purifi based amps?

    Hi guys, I’ve seen a lot of talk on here about all the different amps that are using Purifi modules. I’m well aware that on this site many people love to talk about measurements and I enjoy learning about that, but I have not seen anyone talk about how these amps sound. Would love to hear some...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. V

    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...
  16. 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...
  17. D

    Active Crossover Solutions / Feedback / Recommendations

    Closed - looking at Octo Research dac8 PRO, paired w. Roon + Convolution or MiniDSP.
  18. 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...
  19. 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...
  20. 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...
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