Frequency response, 190Hz–20kHz.
Frequency response, 190Hz–10kHz. The result is +/- 0.5dB!
Left and right speakers, overlaid frequency responses, 190Hz–10kHz, using a 2.5dB scale. Pretty close!
One-third-octave smoothing (red) vs. unsmoothed frequency responses, overlaid, 190Hz–10kHz.
Cumulative spectral-decay (i.e., waterfall) plot.
I’ve been involved in the business of high-end audio for over 20 years, and in that time I’ve seen and heard more products than I care to remember. In those two decades I’ve never failed to be surprised at how often a company’s actual production units fall short of the claims made for them in marketing. Often, the reason comes down to the company’s quality control, or lack thereof. You’d be surprised how many high-end loudspeakers are packed in their crates for shipment without being subjected to any acoustical testing.
While I haven’t yet heard my pair of Vimberg Tondas -- they’re still on their way here -- I can say that I’m satisfied with the process I see laid out by Janczak & Co. in these photos. John Ruskin once said, “Quality is never an accident. It is always the result of intelligent effort. There must be the will to produce a superior thing.”
And that can certainly apply to a pair of loudspeakers.
. . . Jeff Fritz