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  1. M

    Emotiva on transformers vs SMPS

    Nice to see they have an Audio Precision; now if only they followed Schiit & Topping in releasing the AP reports.
  2. M

    Emotiva B1+ quasi-Spin & measurements | Archimago

    https://archimago.blogspot.com/2021/02/measurements-emotiva-airmotiv-b1.html? I was gonna say it looked poor, until I noticed he only used a 30dB scale. Taking that into mind, this is really good for $230 (the original B1 was $300). Do not use the grilles though. Oh, and he also goes on to...
  3. M

    Varying vs constant phase?

    Saw this guy post on Reddit: This was for an exam and he said that the constant phase turned out to be the correct option. Any guesses why? I would have said Option 2, as the phase is lower in the bass, thus the EPDR would be closer to the raw impedance of the speaker, whereas a high phase...
  4. M

    B&W 705 Signature Measurements | Stereophile

    https://www.stereophile.com/content/bowers-wilkins-705-signature-loudspeaker-measurements At a $1000 premium over the $3K 705 S2, it features a higher end finish and an optimized crossover. Stereophile measured the original 705 in 2004, where the price was $1500 (inflation calculator puts...
  5. M

    RBH PM-8 Studio Monitor Review & Measurements | Audioholics

    https://www.audioholics.com/bookshelf-speaker-reviews/rbh-pm-8-monitor https://rbhsound.com/pm8.php $3200 in standard finish, $4000 with side accent panels (made of stone) Not sure why the RBH site shows a silver woofer and Audioholics a black woofer. I won’t post all the graphs, just the...
  6. 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...
  7. M

    Vimberg Amea Bookshelf Measurements | SoundStage/NRC

    https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=2401:nrc-measurements-vimberg-amea-loudspeakers&catid=77&Itemid=153 0-15-30° H 45-60-75°H At $14,000-$15,000 USD, I‘m a bit disappointed by the directivity mismatch around 2kHz. Without looking at the price, I...
  8. M

    Help defining wide/narrow directivity/disperison.

    So, if you guys don't know, I have a speaker selector Google Sheet that you can use and narrow down the list with multiple filters (both scores, price range, measured sensitivity, physical dimensions, enclosure type, etc.). I am wanting to add dispersion categorization, but then of course we...
  9. M

    Monitor Audio Gold 100 (2019 revision) measurements by SoundStage/NRC

    https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=2204:nrc-measurements-monitor-audio-gold-100-loudspeakers&catid=77&Itemid=153 M.A.’s speaker measurements are all over the board, some are good and some are not, I don’t even know how they vary so much unless there...
  10. M

    Stereophile has started calculating EPDR.

    https://www.stereophile.com/content/goldenear-brx-bookshelf-reference-x-loudspeaker-measurements And he is going back to previous reviews and adding this in. EPDR (Equivalent Peak Dissipation Resistance) takes the impedance and phase data and computes a new impedance that shows what equivalent...
  11. M

    A high end DAC that actually isn't garbage.

    Stereophile recently reviewed the "Weiss Engineering DAC502" DAC & headphone amp, I went straight to the price tag and saw $9850 and eagerly went to the measurements to see what a shit show it would be, but it actually is pretty good, not Mola Mola good, but good. Here is a comparison with the...
  12. M

    Speaker Sensitivity: Advertised vs Measured

    Speaker sensitivity is an important aspect that can sway potential buyers towards or away from a specific model or brand. Thus, it gives an incentive for manufacturers to fudge their numbers; this fudging can be accomplished via the frequency range, weighting, in-room estimates, etc. I decided...
  13. M

    Mark Cerny (PS5’s Lead Architect) covering HRTF & 3D Audio

    It’s covering the whole system, but this section (40min mark) shows how serious Sony is taking audio in games. I’m surprised this is currently #1 on trending on YouTube, as it’s not like Apple doing a Keynote for a new product, it’s simply Mark talking about how they created the PS5. The...
  14. M

    NHT C3 measurements by SoundStage/NRC

    https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=2273:nrc-measurements-nht-c-3-carbon-fiber-loudspeakers&catid=77&Itemid=153 It’s the new carbon fiber edition (ugly IMO), but it’s just the finish so the performance should be identical. MSRP of the original is...
  15. M

    Gene from Audioholics has contracted the Coronavirus

    In the Community tab He lives in the same city as me, very sad/scary. EDIT:https://www.tampabay.com/news/health/2020/03/11/pasco-man-46-says-hes-countys-first-coronavirus-patient/
  16. M

    Measurement to show difficult load handling (high phase)?

    A high phase angle (45°) results in an amplifier becoming less efficient, dissipating more heat, so it needs to draw more power to make up for that loss in wattage. If a speaker is low impedance and high phase, it really taxes the amp and many amps will not be able to draw enough power to...
  17. M

    Question about sampling/PCM/Nyquist

    Got into a discussion on another forum. Trying to see if a user‘s claims have any theoretical merit. So, Nyquist states that if you sample >2x the frequency range you want, it can reproduce that range perfectly (with quantization noise). However, what if there was a super short transient (say...
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