Measurements and conclusion
Contents
The measurements on the DaSL monitor speaker show no surprising things. What is immediately noticeable is the favorable impedance. It actually doesn’t dip below 7 Ohms, which makes it a friendly load. Even for tubes. Not very surprising, considering Rik Stoet‘s product range. We do see a resonance return at 650 Hz. That could be in the cabinet….
Electrical phase can be a bit tricky at 50 and 100 Hz. There it hits 45 and -40 degrees. But the impedance remains friendly, so the question is how much you will notice that. We measured the efficiency of the DaSL at 1 kHz, 2.83V, 1M at 87dB. That, along with its favorable impedance, makes it not difficult to drive.
Frequency response is straighter than we expected from this speaker. It is quite neutrally tuned. In the measurement without window we see that the speaker’s response is neutral from around 70 Hz. This is not bad considering the size AND the fact that it is a closed system. (Forget the dip in this measurement, that is a reflection in the room that extinguishes that area).
Distortion in the speaker is low. Generally, it’s below 1% with most of it being below 0.3% (from 200 Hz and on). By the way, we also see a bump here around 600 Hz. That will be the resonance that we also see in the impedance measurement.
All in all, neat measurements!
what exactly is a bbc-dip ?
It’s a slight ‘dip’ in the frequency response between 1 and 4 KHz