Review unit provided by Shenzhen Audio:
TruthEar x Crinacle Zero Red Review
The Zero Red is essentially a version of the Zero that’s tuned to Crin’s preference target rather than Harman IE 2019, which is what the original Zero was aiming for.
So this is a bit of a data dump for all of the measurements that I’ve taken on it so far. I may add more in the future.
NOTE - These come with two different types of silicone tips, one with a smaller opening and the other with a larger opening. For most of these measurements, the default tips that were used are the ones with a larger opening. To see a comparison between the two, check the images further below.
B&K 5128 - 10dB slope
GRAS (Official RA0402) - 10dB slope
Note the normalization here - it’s different from where it is on the 5128 just because I wanted to show on that one how close the Red gets for the balance of fine-grained stuff in the treble. I may match them both at 1khz in a future image, however the compensated data is already there, so that should suffice.
Harmonic distortion (110dB)
This is at 110dB, which is not a representation of reasonable listening volumes. Rather, this is just testing the behavior at excess volumes. Here it is closer to 100dB, which is still louder than you’ll want to be listening, but it’s already under control.
vs Harman IE 2019
Vs IEF 2023
Consistently the wide opening tips measure with more mid treble and less upper treble compared to the narrow opening tips. Same with the foam tips. Also some subtle differences in seal it seems as shown by the bass, but this was a consistent result for many reseats.
Red vs Zero
10 ohm impedance adapter (included with the Red)
What’s interesting about this is that based on the statistical model that predicts listener preference, the Red is less likely to be preferred than the Zero, however I personally prefer the Red significantly.
Take these with a grain of salt - this is just a model.
For anyone who has heard both, please weigh in on which you prefer.