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Which would be easily measurable. Think about how many soldered junctions exist in an amplifier and a passive speaker (crossover, driver itself) and how much influence another properly soldered junction can have. Good Heavens! Thank God I only use soldered cables ;)

If by chance any of John's viewers stray here.... Somewhere in the video John says that for loudspeaker room measurements an uncalibrated microphone is perfectly adequate - see here in the vid. You can certainly find "big holes in the response", but you can also come to completely wrong...

Theoretically the room gain for the left LS in the corner is up to 18dB for the right LS up to 12dB. For small to medium rooms with normal listening requirements, such LS are sufficient in any case. But one should always say where the limits are and what can be problematic. If someone drives...

Erin measured an older version of the Sointuva (meanwhile there are several versions of the LS). The sensitivity of the version Erin measured is 82.6dB (avg. 100Hz-1kHz for 2.83V measured at 1m) with an f3/f6 of 43.9/36.6Hz - see spinorama.org data section of the speaker. Since the new version...

[off-topic] Sorry, I didn't follow the whole discussion, just got in on the interesting off-topic. The influence of the reflections probably depends to a large extent on the studio design ("old school vs modern"). If you personally emphasis on LW, why not. What is the proportion of direct...

One should be cautious with generalized statements about the effects of vertical listening axis changes. Because many loudspeakers have similar crossovers (often 2kHz with Linkwitz-Riley fourth order) and we are familiar with it, they behave similarly in the vertical plane. But if the crossover...

Tweeter flush mounted but with gap around face plate? If gaps are present and not too narrow, I always stuff them with black foam or black sealing tape (or black cardboard) - this allows the tweeter to be removed again without any problems. What happens if the tweeter is flush mounted or...

Because of the low harmonic distortion, high power handling and possible low crossover frequency, the D2905/990000 was considered. Since the goal with the Directivia r2 is to achieve SOTA radiation at a low overall price, preference was given to the Seas DXT over the D2905/990000, which is 2.5...

Front plate with "small lip" around the tweeter dome Nerdy question ;) Let's take a look at what the manufacturer had in mind when designing the tweeter with a front plate like a lip augmentation from a plastic surgeon. Let's start with the third tweeter front plate design from the initial...

If you mean this SS tweeter, don't expect too much. https://www.scan-speak.dk/product/d2905-990000/ Have used the tweeter in the process of the Directiva r2 design simulations and the results were not satisfactory in terms of even radiation. For a uniform radiation the tweeter should radiate...

That sounds very exciting. So you would try to find a "short waveguide" for, say a 1'' tweeter, which corresponds to a given radiation pattern with shape optimization? What parameters would you need for this?

No problem, since @Tangband will be taking measurements anyway, so we will soon have a comparison to your measurements. I assumed that you used an individually calibrated measurement microphone and the calibration file was active when measuring with REW - otherwise this would be another...

Actually, no. The in-room response should actually drop slightly at higher frequencies. The slope of the in-room response depends on the speaker concept and your own taste. For "normal" speakers the rough guideline is as flat as possible direct sound, i.e. flat on-axis FR (+ listening window)...

Yes, the fact that the break-up resonances are virtually non-existent in the manufacturer measurements and figuratively poke your eye out when looking at it in the independent measurements is "normal". I have independent measurements of the Mark Audio Alpair 10 Gen 2, and the difference between...

An averaged room measurement with heavy smoothing can give a rough overview of the tonality of the loudspeaker in the room, but is not comparable to a "quasi anechoic" on-axis measurement or a full set of hor and ver measurements. In your measured microphone signal it is no longer possible to...

It is not difficult to get a rough estimate of the on-axis frequency response (assuming that the half-space manufacturer driver measurement is reliable) and speaker radiation. For this we take Tangband's specification (31L, BR @36Hz) and simulate the low frequency response of the speaker with...

Don't want to confuse you, just to avoid possible mistakes, the gate seems to be chosen a bit large - maybe you have additional runtime in the measurement and all is perfect ;) You measured the speaker at 1m distance and 1.2m height in the garden, then the nearest reflecting surface should have...

For gated measurements you should not use "psychoacoustic smoothing". The gate itself already causes a severe smoothing in the mid and low frequency range. The "psychoacoustic smoothing" only hides further details or it exaggerated resonances - so don't use it. From REW doc: For a better...

By H2 buses, I always mean using hydrogen fuel cells (which charge a small battery, which then powers an electric motor). As you said, with H2 combustion the overall efficiency would be significantly worse.

My city is planning to build an electrolyzer, but unfortunately also a hydrogen refueling station. The hydrogen produced in the future is too valuable to waste on powering vehicles. E-buses convert about 75% of the energy used into propulsion energy, H2 buses only 25% (this might get a little...