Astell & Kern AK T8iE
The AK T8iE makes a compelling premium first impression with a lavish accessory package, detachable balanced and unbalanced cables, and a standout leather carrying case. StereoNET United Kingdom also notes five silicone and three Comply tip pairs, giving owners welcome scope to tailor their fit.
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Kinda Soggy
Sound Quality
50/100
Fit Comfort Isolation
50/100
Build Accessories
75/100
Value for Money
85/100
Pros
Exceptionally well-presented package with a standout leather carrying case.
Generous fit accessories: five dedicated silicone tip pairs and three Comply foam tip pairs.
Includes both 3.5 mm unbalanced and 2.5 mm balanced detachable cables.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 50/100
The supplied review excerpt does not discuss the AK T8iE's tonal balance, detail retrieval, staging, or dynamic behavior. Its sound performance therefore cannot be meaningfully characterized from the available evidence.
Bass
50/100
The available review material contains no listening comments on sub-bass extension, bass impact, texture, or control. No conclusion can be drawn about bass performance.
Midrange
50/100
Reviewers provide no comments about vocal placement, instrumental timbre, midrange body, or clarity. The available evidence is silent on this aspect of the presentation.
Treble
50/100
The supplied excerpt does not address treble extension, air, smoothness, sibilance, or fatigue. There is no reviewer evidence to characterize the treble.
Resolution Separation
50/100
No observations are provided regarding microdetail, layering, or separation in dense arrangements. The reviews say little about its resolving ability.
Soundstage Imaging
50/100
The available review extract does not describe soundstage size, image placement, depth, or positional precision. Spatial performance is not covered.
Dynamics Coherence
50/100
There are no reviewer comments on transient response, macro- or micro-dynamics, or driver coherence. The supplied evidence does not assess how the IEM handles rhythmic impact and complex passages.
FIT COMFORT ISOLATION PERFORMANCE 50/100
The package includes several silicone and Comply tip options, which should give owners some scope to experiment with fit. However, the supplied review does not report actual wear comfort, seal consistency, or real-world isolation.
Seal Stability
50/100
StereoNET lists five pairs of dedicated silicone tips and three pairs of Comply tips. It does not say whether the earpieces reliably maintain a seal during use or whether fit changes the sound.
Comfort
50/100
The review excerpt contains no first-hand observations about shell ergonomics, nozzle fit, pressure points, or long-session comfort. Tip variety alone does not establish comfort across different ears.
Isolation
50/100
Although the AK T8iE is specified as a closed in-ear design, the review provides no practical comments on outside-noise attenuation. Its passive isolation performance is therefore undocumented here.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Accessories
75/100
StereoNET highlights a well-presented accessory set: five silicone tip pairs, three Comply tip pairs, a cable clip, and a leather carrying case. The reviewer calls the leather case a standout, though the supplied material offers no direct assessment of shell durability, MMCX reliability, or cable construction.
Value for Money
85/100
At $999, the AK T8iE sits in a premium IEM segment where sound performance, fit, and long-term build execution need to be convincing. The supplied review does not directly compare its value with similarly priced rivals or state whether the asking price is justified.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
Forum Mentions
No forum mentions found yet
Specifications
- Model
- AK T8iE
- Transducer type
- Dynamic, moving-coil
- Operating principle
- closed
- Frequency response
- 8 – 48,000 Hz
- Impedance
- 16 Ohm
- Total harmonic distorsion
- <0.2 %
- Power handling capacity
- 10 mW
- Nominal sound pressure level
- 109 dB SPL
- Sound coupling to the ear
- intra-aural
- Cables
- two cables: one for balanced-mode use, one for unbalanced-use 1.30 m, two-sided, detachable
- Connector
- MMCX at earphones / 3.5 mm 3-pole jack plug on unbalanced cable / 2.5 mm 4-pole jack plug on balanced cable / 3.5 mm 3-pole jack plug on unbalanced cable / 2.5 mm 4-pole jack plug on balanced cable
- Weight without cable
- 7 g per pair
- Specification
- - Audio was NOT muted during the measurement. - The image/specification may be changed without notice to improve product performance and quality.
Manufacturer's Description — Astell & Kern
Beyerdynamic x Astell&Kern
The first high-end in-ear model with Tesla Technology inside AK T8iE from beyerdynamic in
cooperation with Astell&Kern.
The AK T8iE has been developed and designed from scratch to offer a superior in-ear sound experience.
The finest engineers who developed acoustic reference headphones such as the T1 and AK T5p also designed
the AK T8iE, a new landmark in the Tesla family. The dynamic moving-coil transducer offers an extreme
wide frequency range with crisp bass, well-balanced mids and crystal-clear highs.
Each AK T8iE is handcrafted in Germany by skilled employees, who have long-term experience assembling
small electronic components.
Every single constituent of the AK T8iE is tested and approved multiple times before leaving our
assembly line. This guarantees the highest level of quality and long lasting product durability.
Beyerdynamic
Established 90 years ago, 1924, in Berlin, Germany by Eugen Beyer, Beyerdynamic is the essence of
audio technology.
Beyerdynamic is the leading audio equipment worthy of its name that has developed controller-mounted
wireless conference system starting with the world’s first dynamic headphone--the DT 48, which is
available even today.
As the inheritor of the Eugen Beyer brand, Beyerdynamic maintains the leading corporate image,
vision and role put in place by the founder. The technological advancements, continuous innovation
and the world’s best quality have made Beyerdynamic the undisputed industry-standard and sound
technology market leader.
Tesla Technology inside AK T8iE
The Tesla Technology inside AK T8iE stands for a superb listening experience. First emerged in 2009 with the reference headphones the T1 and later the AK T5p, the Tesla in-ear is dramatically miniaturized with the same characteristics of its bigger siblings. An extremely high magnetic flux density within a ring magnet ensures a balanced, undistorted, transparent and neutral sound reproduction.
Sounds like an integrated whole
In comparison to other earphones with Balanced Armature(BA) technology, there is no separate transducer for bass, mid- range or treble tones. This avoids phase problems and the losses of sound quality that results from this. From deep bass to the highest trebles, the AK T8iE sounds like an integrated whole. Additionally, the efficiency of the Tesla transducer is so high that it can easily be matched to a 4-way BA system.
Anatomically shaped for perfect fit
The concha design with the cable running rearwards over the ear has several advantages.
The in-ears are easily inserted, and don’t fall out because the cable doesn't pull.
The oval-shaped concha moulds sit very comfortably in the auricle without any pressure. Therefore a
variety of ear canals of people from around the world were measured.
On top of that five different sizes of anatomically shaped silicone tips and three pairs of Comply™
foam eartips ensure the perfect ear for every ear.
Great flexibility
All cables are Kevlar-reinforced and exceed highest quality demands, steeled for everyday use and mobile application. Besides the standard 1.3m cable with the general-purpose 3.5mm plug there is an additional balanced cable for Astell&Kern devices (works with AK100Ⅱ / AK120Ⅱ / AK240 / AK380). It provides a balance output with its specific 2.5 mm 4-pole terminal. A leather case stores the in-ears safely for transport.
Handmade in Germany
Products from beyerdynamic are being developed and mainly hand-manufactured in Heilbronn.
Aside from the fact that each AK T8iE is handcrafted in Germany by skilled employees, even the heart of
the in-ear the Tesla transducer and the diaphragm are made in our own factory.
All parts are tested and approved multiple times before leaving our assembly line. This guarantees the highest level of quality and long lasting product durability.
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