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The results of research into this topic indicate that the type of material used in a tweeter has no bearing on its "sound" characteristics. Of course, peaks and dips in a tweeter's response will be audible, and these can be affected by the materials used and their damping properties. More on the...

The plot below compares the LV12 vs L12 vs F12 subwoofers. It is apparent that the F12 has noticeably more low-frequency extension, providing 3dB more output at 10Hz over that produced by the L12. At 20Hz the difference is less, but it is still a quite noticeable 1.5dB or so. The F12 seems to be...

If the choice is strictly for music, then the L12 will have better performance from a transient response point of view. The more rounded knee of the L12 will provide a better transient response and less phase shift for the low-frequency response. That is a result of its nominal 2nd-order sealed...

It has the potential to help, but it may need to be placed somewhere that is not aesthetically desirable. As was mentioned, it's possible to easily adjust its output to suit your particular needs, without shaking the room down, let alone the house if you get too enthusiastic about what you are...

That's likely to be due to room modes and the distinct possibility that you can be sitting in a room null where there isn't much bass at certain frequencies. I suggest that you measure your room dimensions and feed them into one of the online room modes calculators. That should give you some...

It would seem that the content of the typical general equation for a sinusoidal waveform, y = sin(ωt + ϕ), is being well and truly ignored by the notion that 'phase is a function of time'. The phase, ϕ, is a constant in that equation.

Why would they be supposed to reach 40kHz, as 20kHz is about the limit of human hearing? Can you point to a formal publication that suggests that 40kHz limit?

The mass of the ribbon in a ribbon tweeter is finite, albeit small. Assuming the ribbon tweeter is behaving in a linear manner, as would be hoped, then its transient response is simply the result of its frequency response.

A research paper by Rotter and Lindau (2010), "Audibility of tweeter performance beyond spectrum and phase", puts forward an entirely different objective experience: "Ten subjects performed the listening test... When eliminating frequency and phase response irregularities, baffle and room...

The 20kHz distortion response versus power level was certainly a concerning feature of the test measurements. The Pioneer SX-1980 amplifier, released almost 50 years ago, had specifications that showed the following distortion characteristcs for 20Hz and 20kHz input signals. These results seem...

I did a frequency analysis of the section referred to above. The results are shown below, and it is apparent that there is even less low-frequency bass content than was identified in the prior analysis. Below is a snapshot of a representative portion of the low-frequency waveform.

@Pieter1267 Is there a specific point where you believe there is "too much bass"? I'm listening now, but it's a longish clip, so your guidance would be appreciated. :) My initial analysis indicates that there is not much happening below 50Hz. Maybe a quick listen to The Dark Side Of Moon will...

Well, amongst the litany of vagaries affecting our subjective interpretation of program material, why would it be desirable to have anything other than a flat on-axis response when this is a very important contributor to our overall perception of a loudspeaker in the room? For example, all other...

Well, I suppose that goes without saying... That seems a tad harsh. Alternatively, it says quite a lot and provides an entirely reasonable and substantial, if incomplete, window into the loudspeaker's performance envelope.

Would not a similarly large, 450-litre no less, vented-box enclosure produce similar, if not more, bass extension? These SKRAM so-called "subwoofer" enclosures are very big after all. However, the examples I've seen don't seem to do much below 40Hz, which really is not subwoofer territory. But...

Hmmm...it's unfortunate that blown tweeters can often be the result of driving low-powered amplifiers into clipping during louder listening sessions. Please don't ask me how I know... Still, 50W/channel should give some safety margin over 35W/channel.

The NAD 304 has a mass of 6.4kg. It has 2x 10,000µF 50V electrolytic capacitors, as well as 2x 10,000µF 25V electrolytic capacitors, so the power supply seems to be reasonably substantial.

The NAD 304 is rated at 35W continuous output power into 8Ω. That's not very much power, although it might be adequate for many listening situations.

@Izaac The Yamaha AX-396 is a very nice amplifier, as borne out by the test results presented in this thread. It's got 60W of power into 8 ohms, which would enable it to pair very well with the ELAC Uni-Fi 2.0 UB52 loudspeakers. Of course, all of this assumes that your AX-396 is in good working...

It may be difficult to find the appropriate transistors to replace the broken ones. It also sounds like major work, and thus a repair could end up being expensive, especially if some other components were adversely affected and needed replacing. At this stage, it would seem prudent to look for a...