Measurements and conclusion
Contents
We measured the SP25 Prism with our Prism dScope III. We entered coaxial and single ended analog out (Front 1).
Prism SP25 measurements
The results are fairly average. The noise floor is very good with about -120 dB peak and -143 dB at its lowest point, we must say. However, we do see some “junk” around 24 kHz with each noise measurement. That’s around -120dB, so it’s not going to bother you. But it is noticeable. In a wider measurement up to 96 KHz, we see harmonics of that noise.
Distortion is low. Both THD and IMD are fine under control we see. (We measure full power out, so volume is fully open at the measurements). Dynamic range is 103.6 dB. We would have liked that to be better, as the Sabre 9028Pro dacs are capable of better performance. In the linearity measurement, we see that the dac starts picking up from about -120dB. In short, there is about 20 bits of range, which is fine. There are converters that achieve more, but then we are also in other price ranges.
Crosstalk is decent with about -110dB on average and -122dB at best.
Perlisten R5t measurements
The Perlisten measures nicely. Response is within 1dB, except after 10 KHz. Then it rounds off a bit when measured on 1 meter in front of the speaker. Off axis that will be compensated by the waveguide, we estimate. We see that quite often.
Distortion is generally low. Especially in the lower regions it is well under control at 0.17%. The bump between 700 and 2200 Hz is noticeable.
Where it comes from is a bit of a question. It still sits at 0.7%, but that’s just on the high side we think. We don’t see it reflected in the response or in the waterfall.
All in all, the Perlisten R5 measures just fine. Response is neat, distortion is reasonable, but very good in the bass.
