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Thank you! A bit on the heavier side for me but still reasonable. The LCD-5 is the heaviest I've found to be still tolerable, so this is excellent. How does Noire XO handle leakage (long hair/glasses) compared to other DCA headphones?

How much do they weigh? It is not shown in any reviews or on the website

Any recruiters in the EU willing to take an immigrant from the US? I currently work as an audio engineer (magnetics/electromechanical), and I have 10+ years of experience with Linux, Java, C, C++. I've worked on dm-crypt and drm within the kernel, and on ffmpeg, libopus, libretro, osbuddy a...

I love this forum, and I appreciate the moderation decisions by the now ex moderation team. It's sad that these are the consequences, but I hope we can grow again in the future. I fully understand and respect your decision to step down. But now, if I may soapbox to all members of the forum...

LMAO at the meme first thing below the graph But 0.5 Vrms is ridiculously low to saturation. The gradually rising distortion profile (from 0.5 to 3 V) is like a tape saturation simulator (but tape saturation has nicer/more predictable spectra than whatever's coming out of this :facepalm:)

Not true; feedback can mitigate even this distortion. The Topping B100 is Class B.

Oh wow, that's phenomenal performance, and it's class B (edit: this is misinformation; it is AB, unlike the B100). I'd still take a Purifi amp over this simply because of efficiency ;)

The big money audio market remains saturated with products plagued by the "design using emotion" paradigm. It's a grift. That this headphone unashamedly commands $5500 further exemplifies this grift as the status quo. Regardless of whether this is a QC issue, this performance is inexcusable for...

Doppler, i.e. FM, is inherent to all drivers simply because of a rather slow speed of sound combined with a comparatively significant (nonzero) driver velocity. For any given frequency, the larger the excursion, the larger the amount of FM that will occur. However, FM is only one mechanism of...

I wouldn't be so sure about this. Roundovers definitely help with diffraction, but with narrow baffles, you push the frequencies where diffraction becomes a problem into the octaves where the sound is already directional, especially so with a wide waveguide. A bigger baffle with gentle...

The SPK16 isn't supposed to be a mind-blowing speaker. It's Purifi's reference implementation of their in-house drivers via a simple 5th order 2-way design in a well-engineered box. The constant directivity tweeter and low distortion woofer themselves are the stars of the show; they can be...

Bingo, and this is why feedback really has to be taken as close to the load as possible. You can't cheat physics; the load is the most unpredictable part of the system. That said, I can't help being curious about the NFB implementation @IVX has in the PowerDAC v2.1... =)

I'll give Topping and SMSL credit for using measurements to guide their design, but with ample feedback, it's not that difficult to achieve 100 dB or more of SINAD. FDA is an idea that looks good on paper, but has a major flaw in practice: there is no analog reference to create a control loop...

Wow, by far the most interesting gear tested here in a while. I'd love to see a future iteration with a 4.4 mm pendaconn output, 4 volt or higher output (maybe even using USB-C power delivery), and low impedance load current delivery competitive with the E1DA 9038s or L&P W4 or Moondrop...

René, thank you for your excellent writeup at the beginning of the thread. Do you have a writeup on applying acoustic theory to boundary loading? Please padon the late response.

I love this idea. Btw @amirm in your OP you made the initialism RFA/RFAA. Do you mean RFR/RFRA?

You are the greatest!! I'm really excited to see how this goes =)

This is necessary reading to understand Purifi's design choices. In a nutshell - the annulus (the surround) is the most nonlinear component of the radiating surface, and is the source of the majority of a driver's second-order distortion (2nd harmonic distortion combined with first sum and...

Well... it has been a while since I popped in to ASR! I've been lurking nonetheless because I'll always be a bit of a gearhead, and this is the best spot to get a fix for measurements :p But besides being an audiophile, I'm much more so a melophile - and I love to sing! It is the greatest joy...

Yep, that's quite a dramatic result. Looks like it was the right call to screw the woofer to the brace!