KBEAR’s latest model is the entry level KS1, a single DD design.I received a review unit from Wendy Li from KBEAR, via Ali Express.
Product Link: https://m.aliexpress.com/item/1005002184896879.html?spm=a2g0n.orderlist-amp.item.1005002184896879&aff_trace_key=be57116bcf9c49d385e9422362f26672-1615840366669-05255-UneMJZVf&aff_platform=msite&m_page_id=9772amp-cLTZdy7_DD1kcZBRZh2RfQ1615840416183&browser_id=04862dda865f45eeacad18e367fb79bd&is_c=N
Here are my thoughts:
The KBEAR KS1 is the latest super-affordable IEM from the company. It is a single dynamic driver design with a 10mm diaphragm and dual magnetic circuit with an impedance of 16 ohms. The diaphragm material is not specified.
The KS1 comes in a small white rectangular box similar to those of KZ, with a line drawing of the IEMs on the front and a list of specifications on the back. Inside, the earpieces are presented in a black plastic tray with an embossed KBEAR logo. Underneath is stored the 2-pin cable with QDC connectors and two sets of silicone tips. The box contains:
- KS1 IEMs (Medium tips pre-fitted)
- 2-pin black braided cable
- Two pairs silicone tips (S, L)
- Documentation
The accessories, as expected, are very basic but are acceptable at the low price.
The KS1 resembles the earlier KS2 model in appearance. The earpieces are smoothly contoured and light in weight. Available in plain black or white, the faceplate is emblazoned with a prominent KBEAR logo in the centre. The interface is 2 pin, 0.78mm and QDC connectors are used. There are two small circular vents for the dynamic driver on the inner surface.
The 4-core cable is black and tightly braided and the material is 4N copper. It is terminated in a right-angled 3.5mm metal plug with silver accents. The QDC connectors and the Y-split are finished in black plastic and there is no chin slider. The cable is quite prone to tangling.
The KS1 was tested using an Xduoo X20 DAP. The stock cable and pre-fitted tips were used and I achieved a comfortable fit with good isolation. A burn in period of 100 hours was carried out. Adequate volume was achieved with no need for additional amplification.
First Impressions
Before burn-in, the KS1 displayed an over-warm profile which was lacking in definition. The running in process transformed the sound, resulting in a warm, entertaining V-shaped tuning with a strong bass which dominated on some material and produced a little bleed into the midrange. The tonality was generally natural and “analogue” in quality. Midrange was recessed but possessed good timbre and reasonable levels of detail. Treble was above the level of the mids and there was an emphasis in the lower treble and a mild roll off in the highest frequencies which resulted in some loss of detail. Staging was average in width and depth, with height very well reproduced. The sound was eminently suitable for long-term listening.
Bass
The bass was powerful and deep and possessed a good impact and weight. Slightly warmer than neutral, it had a vinyl-like tonality, but it did dominate on certain material, especially in the mid bass.
In Mike Oldfield’s “Tubular World” from “The Songs of Distant Earth”, the bass reached down to the nether regions with excellent weight in the synth bass with the rhythmic integrity maintained well. The texture of the bass guitar was very well rendered. There was some dominance over the other frequencies, but this suited the piece, with the KS1 delivering an entertaining and foot-tapping performance.
Aaron Copland’s famous “Fanfare for the Common Man” received a stirring rendition from the KS1. Though perhaps a little over the top, the bass drum resonated impressively and the timpani were impactful while the brass shimmered high up in the orchestra. The KS1 delivered a dramatic and enervating performance in every way in the wonderful recording by the Minnesota Orchestra under Eiji Oue.
Midrange
Although somewhat recessed, the midrange was still articulate with a somewhat warmish cast in the lower region deriving from the mid bass and it became brighter towards the boundary with the treble. Generally the timbre was natural and with a good transient response.
Davol is an American electronic music artist with a series of imaginative albums to his name. “Mystic Waters” is the title track from his eponymous debut album. Smooth synth patches introduce the track which are joined by a solo guitar-like voice in the bridge. On the KS1 the solo displayed excellent clarity and projection while accompanied by solid bass and atmospheric effects spread horizontally. The sense of space and ambience produced by the KS1 was palpable.
“Bring him Home”, from “Les Miserables” received a heart-warming performance from The Piano Guys. The timbre of the cello and piano was very authentic. The effect was perhaps a little larger than life in the lower notes, but the emotion and feeling of the piece was conveyed most effectively, with the two instruments both contrasting and complementing each other. This kind of material was perfect for the KS1.
Treble
The KS1’s treble was fairly well-tuned. Detail retrieval was reasonable and there was a minor roll off in the high frequencies, but nonetheless, the overall effect was smooth and easy to listen to with no disturbing peaks. However, I found myself wishing for a little more detail and sparkle.
Mark Dwane’s series of albums showcase his imaginative MIDI guitar productions. “Paragons” from the “Archives” album begins with jangly electric guitar chords accompanied by electronic and percussive effects. It came over impressively clearly on the KS1 with good separation and layering with the character of the instruments well portrayed but with the leading edges losing a little bite.
The syncopated rhythms and lively orchestration in “Morning” from Britten’s “Four Sea Interludes” was depicted attractively on the KS1. The staccato brass and woodwind stood out clearly but could have been a little more incisive. As the piece progressed the staging condensed and the attack was somewhat soft which led to the urgency of the performance being diminished and the sense of space in this classic recording by Andre Previn and the LSO losing some of its atmosphere.
Soundstage
The stage was average in width, not reaching beyond the ears, but depth was equal in dimension, resulting in a circular soundstage with a very good impression of height. Layering and separation were generally very good but in more complex pieces and at higher volume, the stage lacked depth and suffered as a result.
“Unsquare Dance” by Dave Brubeck features an unusual 7/4 time signature. Hand claps and clever percussion rhythms, supported by double bass and piano, were presented in a most entertaining way on the KS1 with plenty of verve and life. I enjoyed it so much I played it again! The whole was presented in a realistic, intimate space.
Andreas Vollenweider’s albums featuring his electric harp are always beautifully produced. “Hirzel” from “Book of Roses” begins with the harp backed by a small ensemble. Later on in the track there is a prominent electric guitar solo and a powerful complex accompaniment. The KS1 gave a good account of itself in the simpler part with good imaging and separation but struggled with definition in the more complex section with the stage losing depth and becoming crowded.
Comparisons
BLON BL-01 (single DD)
Like the KS1, the BL-01 has a warm V-shaped tuning with a mid-bass emphasis, recessed mids and average detail retrieval, but a believable natural timbre. In this respect it resembles the earlier, similar-sounding BL-03. The bass has a mid bass emphasis and is slower than that of the KS1 which has a better transient response. The mids are more recessed than the KS1, but the treble on the two is quite similar. The KS1 achieves a much better fit than the BLON which is problematic with its very short nozzles and poor cable, although the build quality is superior. The more even response of the KS1 just nudges it ahead for me.
CVJ CSA (1DD + 1BA)
The CSA has a more neutral tuning than the KS1 and is much brighter in the treble. Bass is sub bass focused with good extension and no bass bleed, the mids are forward with good detail but perhaps not as natural a timbre, and the treble is bright and extended. As a hybrid, it is more accomplished technically than the KS1 and is more immediate in its presentation but is more analytical than musical and therefore may be considered as an alternative rather than a competitor.
KBEAR KS2 (1DD + 1BA)
The KS2 is KBEAR’s previous entry-level IEM and is a dual hybrid. It displays a similar strong V signature with powerful basshead-style low end, recessed mids and bright treble. Perhaps its best quality is its large soundstage which is very extensive. It has an unashamedly “fun” tuning, not unlike the KS1 itself, but the KS1 is not as V-shaped and has better timbre with a more even sound profile and is preferable.
Conclusion
The KS1 is an accomplished single DD IEM at a very affordable price. Its V-shaped profile follows the trend in this sector, but its excellent timbre, lively presentation and controlled treble propel it to the head of the pack.
The KS1 enters a crowded marketplace with highly regarded models from KZ, CCA, BLON and others vying for dominance, but it holds its own against the competition. It does have a prominent bass and recessed mids and could benefit from a little more treble extension, better detailing and a more expansive stage, but at this price this is acceptable. It should be on your shortlist if you are looking for a high-achieving entry-level IEM.