Ikko OH1S ($199): Does the ‘S’ stand for Super?
Ikko: Does the ‘S’ stand for Super?
Pros:
Solid Ikko build
Solid Ikko sound
Good bass
Good vocals
Good looking
Cons:
Case
Oblong nozzle (to me)
Fit of tips (make SURE they are connected…)
Tough price point? See below comparisons
Ikko OH1S ($199): Does the ‘S’ stand for Super?
Ikko OH1S

Intro: Ikko contacted me after finding my
OH-1 review. Through conversation, a review unit was to be send my way.
Rebecca stated that I would probably like the updated version based upon
my previous liking of the OH1. I have no financial obligation in the
OH1S, nor should it be sold for profit (still uncool). It is understood
that the unit may be asked back for at any time. Until then, the unit is
mine to keep and use. I added many comparisons below, since the price
point seems to be the hot bed at the moment.
Rebecca asked that
the unit be burned in for a minimum of 50 hours. The new carbon nano
driver needed that time to fully break in. You can make of that what you
want, but I have always felt the user appreciates what the unit sounds
like six months to a year down the road, not directly out of the box.
Hence, I burn in all units, regardless.
Specs:
1DD+1BA
Hybrid Driver—32Ī© 10mm Deposited Carbon Nano Dynamic Coil + Knowles
33518-unit hybrid driver makes the three-frequency balanced, the in-ear
headphones use resin and aviation-grade aluminum alloy as the sound
cavity to achieve the physical frequency division effect.
In The Box:
- OH1S-2 driver unit
- Detachable MMCX Cable—-OH1S upgrade cable is composed of 127um high-purity single crystal copper silver-plated magnetic core
- 6 sizes of silicone eartips
- 3 sizes of sponge (I-planet)
- storage box
- LOGO brooch
- Instruction manual

Gear Used/Compared:
CFA Honeydew ($249)
CFA Satsuma ($199)
Thieaudio Legacy 4 ($195)
BQEYZ Spring 2 ($165)
DDHiFi Janus-E2020A ($199)
DDHiFi Janus-E2020B ($199)
Cayin N6ii (E01 motherboard)
MacBook Pro
Shanling M6 Pro
HiBy R3 Pro Saber
Songs:
Alex Fox
Pink Floyd
Buena Vista Social Club
Elton John
Stevie Ray Vaughan
Shane Hennessy
Jeff Beck
Dave Matthews
Technicals:
Adopting
SVAS Technology—IKKO in-ear monitor uses Separating Vector Acoustics
System technology, the precisely designed cavity structure makes the
sound volume, reflection and diffusion angles, and the unit performance
is displayed to the greatest extent in a limited space. This seems to be
the de rigor of the day, making the cavity acoustically similar to a
listening room. Many manufacturers do this, and I approve of this
methodology.
Utilizing 1DD+1BA Hybrid Driver, the 32Ī© 10mm
Deposited Carbon Nano Dynamic Coil plus the Knowles 33518-unit hybrid
driver makes balance the three frequencies (low, mid, high) according to
Ikko. Made using resin and aviation-grade aluminum alloy in the sound
cavity to achieve the physical frequency dividing effect. The shape can
minimize mutual interference between the sound generating units and make
the sound purer and more transparent.

Unboxing:
Coming in a sleeved outer
paperboard box decorated with colorful images based around a cityscape,
it is reminiscent of the recent Anime images of some manufacturers, but
better to me. Labeled as part of their “Gem” series, the back has an
exploded view of the unit, and some of the specs in a few different
languages. Tastefully done.
Sliding the sleeve off you are met
with another paperboard box, laden with more pictures on the front and
the same nomenclature on the back. The difference here is that a thicker
box slides out of one long side, while the other opens like a normal
box. That inner thicker cardboard box (well done by the way) has a side
lid, so you can pull on that the “extricate” the inner box from that
secondary paperboard box. That inner box has a nice gold sticker
stating, “Ikko Design,” and it clasps magnetically with a satisfying
click.
Opening the lid, you are met with an MMR-type
presentation, complete with exploded view of the OH1S, attachment of the
cables and how to insert the MMCX cable. Each unit has a label, the
left states “Gem Texture” and the right “Transparent Twin.” Also inset
between the OH1S IEM’s is a lapel pin, which is a nice addition. Remove
that insert, and after removing the instruction manual envelope, you are
met with a pleather case, not unlike the wallets you used to purchase
as a kid on vacation out west (USofA). Tucked between the tips and the
woven case is the slim box for the cable. Next to that is thin plastic
tip holder, with all on display. In total there are 18 tips, including
three sets of Ikko’s own proprietary foam tips. All of the silicon tips
are oblong in shape to match the oblong nozzle, a first for me.
A
word of warning regarding the tips: MAKE SURE they click onto the
nozzle area to seat them fully. Otherwise they may come off in your ear.
I found out the hard way with the smaller foam tips…we shall simply
leave it at that.

Build/Fit/Function:
The OH1S comes
with 1DD+1BA Hybrid Driver, a 32Ī© 10mm Deposited Carbon Nano Dynamic
Coil plus a Knowles 33518-unit hybrid driver. Using resin and
aviation-grade aluminum alloy as the sound cavity in the shell to
achieve the physical frequency division effect, Ikko calls this
Separating Vector Acoustics System technology, designing the cavity
structure precisely, much like you would orient your speakers in the
listening room. More manufacturers are taking the shell cavity seriously
as a means to either tailor sound or ensure proper acoustics. I
appreciate the time spent in R&D with this regard and can see it
expanding in the future.
Made of three pieces, which is unusual
other than the nozzle, the OH1S shell combines the inner part and nozzle
(with a vent hole in the inside); a middle acrylic section in purple
(for mine) and the faceplate in black, and “textured” like ripples or
scales on the back of a Rainbow Trout (Oncorhynchus mykiss).
The nozzle is oblong in shape as well, which is a unique one to me. The
screen comes off as well, so be careful when using different tips. Extra
screens are included in case you lose one. As mentioned above, you will
want to ensure the tips are properly placed, especially the foam ones,
with an audible “click.”
Fit in my average sized ears is nie-on
flush, without pressure in my canal. Using a tip too large can cause a
bit of discomfort, and the seal of the foam tips is among the worst I
have had but do aid in deepening the bass response. For a proper seal
and excellent fit, the large oblong silicon tips work. The cable lies
over the ear, with a stiffness I am not used to of late, but it does not
bother me like older Unique Melody cables used to. With really long ear
guide sleeves, and a permanent soft bend you get good fit, even with
glasses. The shape can be tailored a bit. The four-wire-in-two-strands
is also amongst the stiffer cables I have used of late. Above the
Y-splitter, the OCC silver plated wire looks to be of two strands, but
three colors. A blue tint fades to copper along with the silver strand.
The blue reminds me of heated copper, so I do believe it is for the
visual aspect. Some microphonics is promoted due to the stiffness, but
not much. Quality metal cinch strap, Y-splitter and jack in a dark
copper color makes for a good-looking cable, by not drawing attention to
itself. A reinforced sheath surrounds the MMCX connection, making for a
solid fit.
Other than isolation, which I am blaming on the oblong nozzle, the fit, finish and build are excellent, if a bit economical.

Sound:
Summary:
From
the previous iteration of the OH1, I liked the tight bass control, but
wished for a bit more. Taut bass would be apt. The OH1S indeed gave me
my wishes. While still tight in control, there is no bleed into the
mids, but this does not mean a separation. All is tied together well,
and there is very good separation of note. The thinness of sound, which
came from the OH1 (not a bad thin sound) carries over, but with a bit
more weight of each note. Distinct sounds emanate from within and
placement of each instrument gives the illusion of spacing. Not the
best, but not the worst. Switching to my Cayin N6ii E01, the sound
jumped up quite a bit in quality. Source dependent, I would feed a good
source into the OH1S to get the best out of it. Vocals come across as
slightly lifted, especially male. Van Morrison’s strong vocal presence
can be a bit biting on some IEM’s, but on the OH1S, the sound is
succinct and detailed. Mids carry a bit less weight than the vocal
presence does, making for a slight V-shape to me, what with the good but
not painful treble extension. Nicely tuned, but not a “wow moment” of
transformation. Sometimes (and in this case) that is a good thing.
More detail:
I
mentioned how the OH1 was good with details, but a bit thin. I rate
this due to the lack of a thumping quality of bass. While the OH1S does
not have a thumping quality to its bass, it
does have more than the previous iteration. The carbon nano technology
makes for very fast decay as well, which could help to explain its lack
of pure oomph. A slower decay would allow the low end to linger, and
hence at least give the illusion of more depth. Tight control is also
helped by the carbon technology, and spatial presence of the acoustic
chamber. I do not mind the low-end treatment, for it does not bleed into
the mids, which is a good thing in this case.
Electric guitar work such as Peter Frampton on Reckoner affords good depth to the mids
as an example. The support guitar gives that depth needed to aid in
placing the instruments properly. This in turn leads to good depth of
soundstage. Allowing the instruments to flow through the soundstage, the
mids are clear and fairly crisp. Not the detail monster such as the
Cayin Fantasy or Moondrop Blessing2, but good, nonetheless. I go back to
what I said in the summary, the OH1S does not offend in sound, but
neither does it thrill. By that, I mean the mids promote a smoothness to
them, which can come across as boring, but it isn’t. Wish You Were Here from
the Pink Floyd tribute album shows that there is nothing boring here.
Joe Satriani’s solo is divine in nature, and worth a listen regardless
of listening pleasure. Rik Emmett’s vocals sound like a Guns-N-Roses
version, but better without the edge. I like this version and think it
does justice to Pink Floyd nicely.
Satriani’s solo can move into the treble
range when he gets going, as can cymbal clashes. Not offending me at
all, there is a sufficient push to make up a bit of the smooth texture
laid down by the mids. Not in a disconnected way but tied together well.
Sometimes an over-compensation is had leading to a disconnect. Here,
the tie leads to smooth transitions, without stepping on those lower
notes. Cymbal clashes sound slightly robotic and dissonant, but not like
some I have had of late. Th whole is greater than the sum with the
OH1S.
A good judge of soundstage that I
used to use is closing my eyes and placing my hands at what I would
consider an estimate of reach in all three dimensions. I used this on
the OH1S and found a nicely shaped cube extending a bit past my ears,
but not quite as high. Almost cubic to me, and of good shape. Placing of
instruments was easy, especially with the black background without hiss
between notes. Shane Hennessy’s Rain Dance is an extraordinary
song for the listening but works extremely well for gauging placement
and stage as well. His incredible talents of strumming and using the
guitar as a percussive instrument allow you to gauge very well placement and layering
besides stage. A very complex guitar song with which to start, that
complexity lends itself to excellent spatial representation. If an IEM
(or headphone for that matter) lacks in any direction, it is heard in a
squishing of the sound. On the OH1S there is none. I find the song
wonderful on most listening devices, and here as well.

Comparisons:
Ikko OH1S ($199) v CFA Honeydew ($249):
The
CFA Honeydew came my way by private audition, and it was good. Many
lamented it as a “rehash” of something else. So what. Most manufacturers
fine tune their wares, and CFA is allowed that as well. Capitalizing on
their excellent bass heritage, the Honeydew trounces the Ikko in that
department. Moving towards the middle spectrum, the Honeydew presents
very good details, and it is easy to hear the heritage of the Andromeda
in it. I would rate the Honeydew as distinct and detailed, where the
OH1S is smooth and detailed. There is also more push up top, but not as
much as the Satsuma. If I had to choose one of these two new CFA models,
it would be the Honeydew. As for the two listed here? If you prefer a
bit better defining sound, melded together, the Ikko would fit the bill.
If you prefer better bass, with more distinct details, the Honeydew
would fit.
Ikko OH1S ($199) v CFA Satsuma ($199):
Same
price. The toughest segment to me as well. The $200usd price is a cage
match of excellent to very good offerings. But This gives the user many,
many good options. Both listed here are good but for different reasons.
While the Satsuma adds more detail than the Honeydew (closer to the
Andromeda), it provides less bass. The Satsuma is an excellent detail
monitor to me, and clearly (cleanly?) wins in that department. If you
want a smoother signature, then the OH1S would be your choice. Bass is
about the same, with the mid-bass push of the OH1S versus the deeper
reach of sub-bass on the Satsuma (but not like the Honeydew). If you
want excellent technical skills, the Satsuma is the choice. A smoother
character (to me), then the OH1S is the choice.
Ikko OH1S ($199) v Thieaudio Legacy 4 ($195):
When
Thieaudio first came about, it meant business. Drawing some of the best
engineers out there, the Legacy line comes across as business. The L4
is an excellent monitor with gorgeous looks. Much more mid-forward in
signature as well, the L4 provides the listener with deeper reach of
bass as well as wonderfully toned mids and treble. More push up top as
well, these two actually complement each other quite nicely. If you like
smooth, the Ikko wins hands down. If you like a richness of tone and
excellent details, the Thieaudio would be the choice. I often go back to
the L4 to remember how good it really is. Smooth versus vibrant. Take
your choice.
Ikko OH1S ($199) v BQEYZ Spring 2 ($165):
I
really liked the Spring2 when it came out and will compare it to the
Summer in an upcoming review. I called the Spring2 one of my
recommendations at the price, and that still holds true. The rich
tonality emanating from within aid in a very smooth, laid-back, but not
boring signature. Think of comfort food, and that would be the Spring2.
Just an excellent all-arounder to me. Better bass push, but with a bit
of bleed into the mids, and enough up top to give that “fresh day”
feeling. That bleed of bass into the mids aids in presenting the rich
tone of which I speak. Warmth and grace, the Spring2 is still one of my
favorites. V-shaped? Maybe, but I do not care. The Spring2 would be even
more laid back than the OH1S, going further into that comfort zone.
Want a bit liltier sound? The OH1S would be the choice. Richness that is
of goodness? The Spring2.
Ikko OH1S ($199) v DDHiFi Janus-E2020A ($199):
The
original Janus was and is an interesting tune. A bit smaller of sound
stage, but offering good detail, it dovetails nicely into this segment.
Good bass extension adds to its flavor of semi-tightly controlled mids,
and a rolled treble that while not as smooth or rich as the Spring2 is
nonetheless, a good listening experience. Take note, though. DDHiFi has
retuned the Janus based upon our listening experience and offerings. Two
very different critters. Of all the offerings here, the Janus E2020A is
most like the Ikko, but with better bass, and a bit more veiled mids.
Not bad mind you, but quite close.
Ikko OH1S ($199) v DDHiFi Janus-E2020B ($199):
Completely
redesigned to make it a bit more premium, the Janus E2020B comes across
as more V-shaped than the A-version. Deeper reach of bass, with a
smidgen of bleed makes for a pleasant, crisp tone when combined with the
better reach up top in the treble region. This is a breath of fresh air
when compared to the A-version, and with the OH1S. If you want smooth
laid back, then the OH1S is still the choice, but the E2020B has hit the
sweet spot to me with their tuning, even if it is oriented towards
“consumer version.” Smaller soundstage may put you off, but like the
A-version and smoother OH1S is to comfort food, the B-version may be to
an energy drink after a good workout, or before. I really like the
E2020B if you cannot tell, and a review is forthcoming. Mind you, the
OH1S is still quite good as well and it is nice to have choices.

Finale:
When I first heard the OH1,
everyone said, “you need to listen to the OH10 if you like the OH1!!!”
Well, no I didn’t, even if I really liked the OH1. That was enough for
me for I liked what I heard in the OH1, even if it was a bit bass shy.
The OH1S is a “redesigned” model with new innards, making for
essentially a new model. But I would call it an evolution rather than a
revolution. Taking the good parts of the OH1 such as the clarity of
detail and smoothing the edges to make it a bit well…less edgy…makes for
a smooth transition to the OH1S. Smooth and rich, but not muddy. Warm,
but not warmth overall. A nice laid-back texture emits from within the
designed cavity of the shells, and it comes across as pretty good. Going
back and forth I can note the differences and similarities, but I’m not
sure which one I prefer. I do think I prefer the open expansive nature
of the OH1S more than the OH1, but I can clearly appreciate the heritage
of the OH1 coming through. It is still one of my favorites.
The
OH1S is good. Quite good, but its signature will surely turn some off. I
mentioned how it doesn’t have that “wow effect,” like some. And this
will hurt it when comparing to others. Some may find this boring, or
lacking, but I would kindly ask them to audition it under the right
circumstances, such as the end of a long day with a single malt in hand.
It is then you hopefully enjoy Jeff Beck’s Brush With The Blues as I did.
I
thank Ikko for providing the OH1S to me and hope that you all enjoyed
this journey through my word salad verbiage. The OH1S is good enough to
take a look, and be in consideration at this price point, which as
mentioned is wrought full of choices.
Cheers.

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