Kestrel Audio
K1. $449. Here’s why.
Nothing hidden. Everything justified.
3D model of the K1 headphones: as you scroll, they separate into 7 labeled parts, then reassemble.
02 Headband
Headband machined from a single block of 6061 aluminum. 18 detents, 10-year warranty.
03 Ear cushions
Memory foam ear cushions in protein leather, replaceable in 10 seconds.
04 Ear cups
Magnesium ear cups: 1.7 oz (48 g) a pair, 3 times stiffer than ABS.
05 Drivers
40 mm drivers, bio-cellulose diaphragm, 5 Hz to 40 kHz.
06 Electronics
48-hour battery life. Full charge in 90 minutes. Bluetooth 5.4, LDAC codec.
07 Full view
7 parts. 7 reasons.
Specs
The numbers, no adjectives.
- 48 hours battery life with noise canceling on
- 90 minutes for a full charge
- 40 millimeters bio-cellulose diaphragm
- 10 years warranty on the headband
| Battery life | 48 hours with noise canceling, 60 hours without |
|---|---|
| Weight | 10.2 oz (289 g), ear cups 0.85 oz (24 g) each |
| Drivers | 40 mm, bio-cellulose diaphragm, 5 Hz to 40 kHz |
| Codecs | LDAC, AAC, SBC |
| Noise canceling | Hybrid, 4 microphones, up to 38 dB |
| Charging | USB-C, 90 minutes for a full charge, 10 minutes for 5 hours |
| Warranty | 10 years on the headband, 2 years on the electronics |
| In the box | K1 headphones, hard case, USB-C cable, 3.5 mm audio cable |
| Compatibility | Bluetooth 5.4, multipoint with 2 devices, iOS, Android, macOS, Windows |
| Dimensions | 7.5 × 6.5 × 3.1 in (190 × 165 × 80 mm) |
Comparison
At this price, nobody else shows you the inside.
Six things that matter in daily use, against two headphones in the same range. Brand X and Brand Y are made-up names.
| Criterion | K1 | Brand X | Brand Y |
|---|---|---|---|
| Price | $449 | $419 | $469 |
| Battery life | 48 hours | 30 hours | 36 hours |
| Replaceable ear cushions | In 10 seconds, no tools | No | Yes, with tools |
| Headband warranty | 10 years | 2 years | 2 years |
| Spare parts sold | 7 | 0 | 2 |
| LDAC codec | Yes | No | Yes |
Reviews
Three owners, three countries.
Rated 5 out of 5
The sound is precise without being cold. Three months in, I never think about the battery.
Rated 4 out of 5
Comfortable even with glasses on. The price makes sense once you hold them.
Rated 5 out of 5
I swapped the ear cushions in ten seconds, as promised. They feel built to last.
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