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86% would recommend to a friend 
Alpha & Delta KS1 IEM
01 / 07
Alpha & Delta KS1 IEM
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544 Sold
Product Description
The smaller sibling of the well-regarded KS3, the KS1 IEM from Alpa & Delta is a portable listening solution designed to accommodate different cables while delivering a warm, natural sound. These earphones adopt a 0.78-millimeter 2-pin detachable design, which allows listeners to upgrade or replace cables at any time Read More
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Customer Reviews
4.1
(77 reviews)
5star(32)
4star(28)
3star(10)
2star(3)
1star(4)
By Feature
Build Quality
5.0
(1)
Sound
5.0
(1)
Comfort
5.0
(1)
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keyboard_arrow_downDamionWong
5
Jun 12, 2020
checkVerified Buyer
Amazing!
Upon arrival, looking at the packaging it is okay. but when I got to the accessories, I was surprised with the amount of ear tips that was given. After plugging these into my computer and first listening to music these sounded amazing. The bass was amazing and was perfect for my sound signature. After switching the ear tips to memory foam tips. These sounded way better. The highs are crisp and sharp, mids are a little drowned out, but the bass was by far the most impressing aspect of these IEMs.
Recommends this product? Yes
Cyberthingy
289
Jan 17, 2021
checkVerified Buyer
Great Budget IEM
I don't get why some are saying these are light on bass. I find them quite punchy. If you don't get a good seal they would seem anemic but I put my favorite large tips on them and I get an excellent seal and solid bass. They are not bass cannons but very respectable considering their small size. The treble is a bit bright but so far no sibilance. I've only listened to them for about an hour so far, so I will see how they fare after more time with them. If they get any better after awhile I will be thrilled. I bought 2 since they were so cheap. I think these will be my new sleeping set. They are small enough to be comfortable laying on my side.
Recommends this product? Yes
n1KK3i
1
Keyboard Club Member
Jun 13, 2021
checkVerified Buyer
Decent cheap IEMs
I paid 17$ for these IEMs, and for that price they are absolutely awesome!
I would describe the overall sound as V-shape; bass has a thump and a decent control, midrange is a little bit analytical or shouty, but highs are nicely sparkly and not overly boosted since my ears don't do well with high gain high frequencies.
I've tried these with Dekoni Bulletz 4.9mm medium eartips and even though they fit snuggly my ears, the sound becomes altered quite drastically. Bass gets tighter and more controller, highs are more tamed (good for my ears), but the midrange become even more shouty which I'm hugely against. I switched back to the original eartips.
Oh yeah, one huge complain that I have is the physical shape of the IEM and how well it aligns with my ears (it doesn't). It portrudes annoyngly outwards and isn't sitting as flush as I'd like.
(Edited)
Recommends this product? Yes
saintentreri
79
Feb 18, 2021
checkVerified Buyer
not nearly good as the KS3, but at 17 bucks they're great work boots for a day of heavy chores and such that could result in accidental destruction while still delivering decent sound
Recommends this product? Yes
RustySpork
31
Jan 10, 2021
checkVerified Buyer
Premium looking, feeling, but not quite sounding.
I REALLY wanted to like these. They were $17 when I bought them, and they look fantastic and have great build quality. They also fit just right in my ears; I could wear them for hours. I don't want to, though.
There's really only one thing that kills these for me: the treble. It's too harsh, too syllibant, and too unclear.
To me, they definitely sound like a $17 IEM. They don't look or feel like one, though. If you're not too sensitive to harsh treble, I can recommend them. Otherwise, I'd stay away.
Recommends this product? Yes
Baumdip
1
Jun 27, 2021
checkVerified Buyer
For the price it's a good IEM. Bass feels just right, but the highs are really sharp, mostly noticeable in Rock/Metal tracks.
Recommends this product? Yes
richiekie
1
Jun 19, 2021
checkVerified Buyer
These are some decent iem's for the price. I like the design, and the cable is pretty good. It even comes with a nice storage case. Sound is good, again for the price.
Recommends this product? Yes
Stealtho
2
May 14, 2021
checkVerified Buyer
These are amazing
For my first ever time buying from Drop I am extremely happy with my purchase!!!
Recommends this product? Yes
Mr_Smart_Guy
5
Jan 31, 2021
checkVerified Buyer
What's that buzz I hear? (But they were cheap!)
These things aren't going in the trash or anything, but I'm not impressed. As most of the reviewers commented, they were so cheap (on sale) it's hard to knock them. However, one side buzzes when no music is playing, when they are plugged into my Dragonfly DAC. I don't know if they are faulty (unfortunately no returns for this product on Drop), and I don't know if it stops when the music starts, or if the music drowns out the buzzing. I probably won't use them again, but maybe I can give them to someone who doesn't mind the issue.
(Edited)
Recommends this product? No
MastroiTek
29
Jan 28, 2021
checkVerified Buyer
Nah, not for me, BUT
EDIT: the outer plastic of the cable started to break after 40h of use, I keep them always in their case and I never broke any in-ear headphones, not even the shitty one from apple which I used for 5 years . (Changed evaluation to 1 star).
While reading keep in mind that: I got those for 17$ (with shipping) and I love my flat and base lacking 660s.
I start with the good:
The sound is a defined V and the Sssss it is not too ssssibilant which is nice, the build (cable aside) feels pretty solid and they look nice. The cable is meant to go around the ears, I would describe them as comfortable and with a tight fit.
The cable does not pick up noise, quality is meh.
Now the bad:
The 50-120hz range is there but there is no texture, to me it feels like there is no body to the music. Vocals have little energy and seems to be overwhelmed by that lower frequencies. I'm not familiar with sharp highs and it appears that I don't like them on the KS1, they are not too bad on the majority of songs but for example "At Last, by Etta James" sounds sharp as a katana on those! My ears start to complain about the sharp highs within 30min of listening.
Separation and imaging don't match my expectations, it feels like the instruments exist in a 2D world just next to your ears and there is no separation between them, furthermore the sound is thin even in the low end. A clear example is how they handle "Silence and I, by The Alan Parsons Project" (spoiler: they just don't).
First Conclusion: If you like razer sharp highs don't think about it and get those.
Update:
I changed my evaluation from 2 to 3 stars because I noticed that the sound changes quite a bit depending on the earphones's fit in the ear. Today I decided to give them another chance but I pushed them deeper in my ear, still really comfortable with (at least in my case) a perfect fit/sealing effect.
The sound changed for the better, now the trebles appear less sharp and not fatiguing, there is a bit more texture in the 50-120Hz region which it gives a bit of body to the sound. Those are still V shaped and sharp on the high end, but surelly better than before.
Separation and imaging changed too, now there is greater separation and the imaging improved a bit.
FINAL Conclusion: they are not as bad as I firstly thought, the tuning still does not fit my liking. In my opinion a fair price for those is about 40$ (considering look, case and unboxing experience), but as I said I'm not a fan of the tuning so for you they might be worth more or less than that.
Here is a link where you can see the frequency response: Alpha & Delta KS1 Review | Prime Audio Reviews
(Edited)
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