The Status Audio CB-1s are a rebranded version of the discontinued Somic V2s. Designed in Brooklyn and built in China, these headphones bear a loose resemblance to a de-badged version of the Sony and Audio Technica headphones in the same category that they're competing with. They have a similar neutral-but-slightly V-shaped sound to Emu Purplehearts.

Comfort - These are some of the most comfortable closed headphones I've found to date, embarrassing far more expensive competitors. Some of the best stock pads ever. I'm a tall fellow, and my ears fit fully inside without touching.
Build - You get what you pay for. The headband sliders are a poor quality plastic that tends to crack, and can break with even normal use. Mine broke after a year. They're taped at this point.
Isolation - Good enough for regular portable use but not enough for loud trains or planes.

Sound - I'll try to describe it as best as I can.

Treble - 7/10 - Decent detail but could be better extended above 10 khz. Slight graininess, which many closed headphones tend to have. They are a bit uneven. However, at low volumes they are quite pleasant and have a nice sparkle. Unforgiving toward poorly produced music but well-recorded albums will be fine.
Mids - 8/10 - Vocals are present and guitar upper harmonics have a nice lacquer to them. Again, slightly grainy. A good amp and low volumes eliminate that issue.
Bass - 9/10 - Good extension, tactile quality, without being muddy. Regardless of price, it's pretty good.
Soundstage - 5/10 - There is a 3-dimensional nature to the sound, and there are sounds that seem to come from outside the headphone, but it's closed and it will ultimately have a small stage you'd expect from closed.
Imaging - 5/10 - I feel I am not totally qualified to judge this as this is something that seems to only happen with sufficiently good dacs and amps, which I doubt I have. To me it sounds like these are hard-panned a bit into left-middle-right with less happening in the space between those three points.

I bought the CB-1s as a newbie looking for a good portable set. Took a blind leap of faith on them as they had not been vetted by a lot of reviewers yet, and I'd say it worked out. Years later, looking back at them... these are still good for the price. In fact I've seen them as low as $40 at times so I'm tempted to say they're the BEST for that price. I still use them as my portable pair, despite having heard much more expensive setups. These are still comfort kings and the sound quality difference is small enough for me, that I have yet to be won over to anything else.

An earlier version of the Somic V1s/Status Audio CB-1s. I mistakenly thought they were the same, but there might actually be a difference in the driver for this (The V2/Status OB-1 and MH463 have slightly different drivers as well, it seems). So I have retracted my review and posted it for the right headphone.

Sound...
 
From 100 Hz to 3000 Hz, they trade blows with much more expensive headphones, and that is not hyperbole. That is why so many people love them.
 
Above and below those cutoffs... no of course not.
 
But still, the mids are crunchy and savory. The highs are smooth yet detailed enough to be enjoyable. The bass is warm but reasonably tight, and certainly not bloated. The sub bass is nonexistant, the upper treble is lo-fi. But these little bastards cleverly stylize their deficits to mask their impact on the sound. It's an enjoyable filter that you can view your music through, that isn't the highest in fidelity, but it's faithful and playful enough to be enjoyable for what it is. Don't EQ these (it'll just reveal how flawed the upper treble really is in painful detail). Just listen to them as-is, think of it as a flavoring for your music.
 
Another thing is that just about any crappy hardware can power them. And they will take the worst onboard DACs and the most cringeworthy recording qualities and even the oldest and most unlistenable 128 kbps mp3s and they will make something tolerable out of those. They are the ideal consumer-grade headphone, basically.
 
Comfort... is a mixed bag. The headband will make you bald if you're not careful. The hook will dig into your right ear if they're sitting wrong.
 
Build... they're $30. What do you think?
 
In summary... These are great starter headphones. I would strongly recommend them for students on a budget, as I was a decade ago when I first bought these. Going further with your sound requires significantly more research, time, and money. If you don't want to fall into that hole, this is a good stopping point right here. I still enjoy these guys. I've had them for 11 years. I've bought 4 during that time. Two got stolen, one broke (now I keep two at all times so I have one spare in case the other breaks). One other interesting thing is that they're easy to open up and repair. I've soldered the wires back on multiple times after snapping them with a doorknob, and they still work great. Even if you've been exposed to higher def headphones, if you listen to these for a while, their easy-going nature and crunchy, savory mids, will win your heart once again.

Let's get something out of the way first. There's some debate over whether these are accurate or "reference grade". It seems to me that a lot of people that bought these have done some massive amounts of mental kung-fu to convince themselves that must be what's going on here. From 600 Hz on up, they are very accurate, detailed, snappy, but bordering on sibilant at times. Below 600 Hz though, there is a crater in the frequency curve where the bass would've been in normal headphones. This is most certainly not accurate, and I feel that 'subdued' is not a strong enough term to convey what you're hearing. It's almost nonexistant. The only saving grace is that the pathetic excuse for bass that these have is at least extended nicely to the sub bass, and you can try to save it with an amplifier, but it will never sound as natural as it would if the headphones could do it on their own.
 
These are cold headphones. Put an antarctic new spin on all your music. That's not all, because the 3-flange inserts simply won't fit a lot of ear types. The alternatives they include are all bad. I ended up using Klipsch S4 pads to wear these.

These are not headphones per se, more like a medieval head torture chamber than plays sound. Unusually, it's not the clamping force on the sides that causes issues, but on top. The headband is not shaped to fit human heads, but rather one of the square flat heads that the sentient humanoid robots that make Sennheiser products have, I guess.
 
The sound... how would I describe it...
 
Lethargic? It's not neutral, if that's what you're thinking. Rather clinical sounding headphones. The mids have strange prioritizations and the bass leaves something to be desired.
 
Sub-bass: Decent amount of extension
Upper bass: a crater exists on the frequency curve where this would normally be in a headphone.
Low Mids: This is my biggest issue with these. The low mids are very shy on these.
Upper Mids: Overemphasized. Good detail, and smooth, but they get too much priority for my taste.
Highs: reasonably detailed,  not sibilant. Agreeable.
 
The nice thing about the older models of Sennheiser is you can probably find an insane deal on a used one somewhere.
 
I wouldn't bother though. This Sennheiser design is ancient, and it lacks many creature comforts that you can get even for $90 now. The giant curly cable is non-removable for starters, so it's not a good portable headphone, despite the great isolation it gets.

Smooth, good detail, a playful "warm neutral" sound. Not boomy or bloated like Klipsch's lower end IEMs. Quite pleasant. No they're not analytical headphones. No they're not reference headphones. These are not for studio work, they're simply for enjoying music on the go. They will faithfully enough render good recordings with great positional accoustics, and they'll make something salvageable and listenable out of poorly recorded albums and low-fi old mp3s too. Klipsch have carefully removed every frequency that could be irritating, so even Merzbow sounds like puppies licking your ears.
 
Comfort is great. I love the gel tips on the Klipsch headphones.
 
The downside:
 
THE CABLE
 
This cable is thin, knots and forms elbows easily, feels really fragile. For the price, I expect better from a cable. I've seen better cables on stock ipod earbuds. My X-10 broke just months after buying them. One channel crapped out, most likely because of the terrible cable. If you're a psychopath and you like sending in $100 headphones for repairs shortly after buying them, then you'll enjoy that feature.

If you've never heard anything other than the cheap crappy headphones that come with your ipod, these will still sound amazing. Real bass! Actual detail in treble! I can't recommend them however. I'm not sure there's anything in this price range yet for IEMs that's acceptable. Headphones are getting cheaper and better over time so it could be something better has come along.
 
My S4's are trusty little things that still work to this day, unlike my X-10's which broke several months after I got them. They also have a better cable. The rubberized sheath doesn't tangle or break easily and travels very nicely.
 
These are also very comfortable. I loved the earpieces so much, I used them on my Etymotic hf5's. They're smooth and agreeable to listen to for long periods of time.
 
Now let's do the rundown:
 
-Sub-bass - not very much, if any
-Upper bass - muddy, boosted, bloated. All the negative adjectives I can think of. But it is there, at least.
-Mids - drowning in the upper bass muddiness
-Treble - subdued, rolling off rapidly above 8000-ish but there's some detail. Key word... some.