Recent content by NTK

Can you provide some references to published studies that correlate listener preference to Bl factor and Xmax of speaker drivers when they are implemented into speaker systems?

You mean a driver diaphragm that is capable to produce a movement like below? That abrupt stop will require the driver to have an infinite bandwidth.

Dirac applied a +14 dB correction at 20 Hz (= 25X gain in power). That's kind of extreme IMHO.

The center conductor is 10 X 0.1 mm diameter copper wire. The total conductor area is 10 * (0.25 π 0.1²) = 0.0785 mm². Using this calculator, the closest AWG is 28. https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-wire-size

You probably have underestimated how low the average power required is for normal music listening. With 10 W using 2 speakers with the typical sensitivity of 86 dBSPL at 1 W, 1m free field, the in-room average SPL at 12 ft distance is about 91 dBSPL. That is well into the hazardous for hearing...

IMHO, there is little need to worry about how DAC's handle "intersample overs". Unless you have specially crafted test signals, if the source have more than a few intersample overs, that will invariably mean your source is clipped. As clipping is an irreversible process (once clipped, it is...

The 3 dB roll off is from the stairstep reconstruction. Mathematically, the stairsteps as created by the zeroth-order hold process (i.e. sample and hold), is the result from convolving the discrete signal samples as represented by an impulse train (a series of impulses scaled to the amplitudes...

I do not know of a physical mechanism that will cause a loudspeaker to reproduce sound at a slightly different frequency from the source frequency, at least for a single tone.

Actually, no. https://www.ftc.gov/business-guidance/resources/disclosures-101-social-media-influencers

Welcome to ASR! Many of the professional subwoofers have high pass filtered outputs for the main speakers. For example: Yamaha HS8S or Kali Watts WS-6.2. Both only have balanced (XLR) outputs for the main speakers which the Edifier MR4 supports (but with TRS connectors). I think it is also...

How Magico tested their M9 (weighs 1000 lb) with their NFS.

Assuming the amplifiers you are thinking about are based on the Hypex NCxxxMP series, it will depend on which Hypex amplifier module is used: Amplifier Module Input Voltage Required to Reach Maximum Rated Output NC122MP 1.17 Vrms NC250MP/NC252MP 1.66 Vrms NC500MP/NC502MP 2.35 Vrms...

Perhaps Bruno is cheap and he knows the difference is undetectable.

Snake oil. The Purifi evaluation kits, which are supposed to showcase their performance, use TI OPA1612 opamps. If you think Purifi doesn't know how to pick opamps, then why do you want to trust them with the rest of their amplifier design?

Correct.