Close mic
The more I measure close mic, the more I think it is not an accurate reflection of actual performance. It does give some additional info, like that bass port leakage in the mids, and that this bass port is very high-Q. Like, very peaky.
Do note that the port is at the back so actual SPL that you will hear in practice will be lower.
Table edge 0 degrees, tilted back
I measured with mic horizontal and mic higher (i.e. on tweeter axis) since this is a tilted back design. Interestingly does not show much of a diff.
Tilting it forward however does give it 1-2 dB more treble
Tilt back but 45 degrees off horizontal axis, mic level and mic higher
Table edge tilt back 0 deg vs 45 deg comparison
Tilt back vs tilt forward comparison at 45 deg
Pretty much identical
Actual table listening position, 45 degrees mic pointing at driver
Interestingly, my mic does not pick up any major differences between tilt forward vs tilt back, despite my ears seemingly hearing otherwise.
From top to bottom:
- Tilt back normal position 0deg near (mic at around table edge)
- Tilt back table edge 0deg
- Tilt back normal position 0deg far (mic at same pos as table edge measurement)
Listening position, mic cal 90 deg pointing up
Measurements discussion
As usual, I'm taking table edge as the most accurate representation of the speaker. Treble is, from 1kHz, a gentle smooth downward slope of around minus 2 to 3 dB. No shenanigans like any peak or shelf filter or cutting off too early unless you are very interested in 16kHz. It does have a peak at 14kHz which shows up with close mic.
Below 1kHz it is mostly flat if not slightly decreasing with volume as frequency decreases. Port peak 68Hz so it dies off very quickly past that. My room boost does give it more 65Hz boost however. In fact my room gives it too much boost that I need at least 10dB reduction. This does not get captured well on mic unfortunately.
All in all reflects what I hear pretty closely. Nothing much to say about the treble. Eye power estimates around 4dB variation with no sudden jumps for most of the frequency range. A tiny bit shortage of bass quantity, and the bass starts dying earlier than I would have liked, but that is quite typical for speakers of this size. Actually it is already doing pretty good for the size. And very good for the price.
