
KZ - Castor Pro (Harman Target with Improved Bass Version)
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Reddit Reviews:
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Last updated: Dec 5, 2025 Scoring
Liked most:
50
0
"Castor pro is similar in value, or rather higher than the most recommended 30-40 bucks iem at the moment. ... I prefer castor pro bass more.. It's better than kefine delci for me. ... Actually, I have several excellent iem for near 150 dollars, but I use castor pro very often and I'm impressed with that."
"The Castors are objectively better for mixing. ... So it's no longer true that you can't get good IEMs for under $50 that are good for mixing."
"im selling 3k$ worth of amps, dacs, headphones, iems just because I accidentaly heard Kz castor (harman, white, UP UP DOWN DOWN).. no joke ... way way way... im selling 3k$ worth of amps, dacs, headphones, iems just because I accidentaly heard Kz castor (harman, white)... ... but this one slaps for 10$ :-D"
47
15
"The bass is definitely present, punchy, and clean, giving it an impactful low-end response that enhances genres like EDM and pop. ... The mid-bass feels a bit boosted but stays well controlled without bleeding into the mids. ... It has great sub-bass extension, delivering a satisfying rumble that provides depth in the mix."
"im selling 3k$ worth of amps, dacs, headphones, iems just because I accidentaly heard Kz castor (harman, white, UP UP DOWN DOWN).. no joke ... way way way... im selling 3k$ worth of amps, dacs, headphones, iems just because I accidentaly heard Kz castor (harman, white)... ... but this one slaps for 10$ :-D"
"castor pro is ahead in technicality ... There's no question, especially in terms of technicality of castor pro."
60
21
"The switch actually has quite a few influences. ... The Castor pro bass UUDD can bring out powerful bassheads, DDUU can bring out not too many low notes and enough high notes. ... The influence of the switch is actually easy to feel, and it works well. ... It usually plays a large role in making adjustments to be more neutral sound."
"just enough punchy bass to make gunfire and explosions sound right."
"The bass is definitely present, punchy, and clean, giving it an impactful low-end response that enhances genres like EDM and pop. ... The mid-bass feels a bit boosted but stays well controlled without bleeding into the mids. ... It has great sub-bass extension, delivering a satisfying rumble that provides depth in the mix."
22
4
"The soundstage is wider than the bass version. ... This is something you wouldn't easily expect from an iem at this price point. ... super wide soundstage considering the price. ... Definitely one of the best choice for gaming."
"In terms of sound quality it's clearly superior in terms of staging and provides a richer, fuller experience."
"FPS gaming felt astronomical!"
19
3
"The switch actually has quite a few influences. ... The Castor pro bass UUDD can bring out powerful bassheads, DDUU can bring out not too many low notes and enough high notes. ... The influence of the switch is actually easy to feel, and it works well. ... It usually plays a large role in making adjustments to be more neutral sound."
"u can always have the advantage to tune the eq switches to reach a similar output like chu2 ... the whole reason 80% in r/iem like the castor is due to its soundstage and the ability to physically tune the switch ... the switches can be tuned according to ur preference, but most like the switches in 1234, up-up-down-down"
"the Castor pro bass edition with the 4 switches are AWESOME!!! ... the bass is just right(I love bass)"
Disliked most:
4
20
"the comfort on my ear is pretty bad I can't have It for long time"
"It feels heavy to wear ... Compare to my Kz zsn and QKZ ak6 max the castor pro is way heavier even if you combine the weights of the two ... so my ear canals are hurting and I can't wear them for longer period of time"
"at least for me are not comfortable at all and fall out very often"
43
18
"I don't feel any difference in bass"
"Qkz x hbb and 7hz legato destroys them in the bass department."
"the bass edition is not for gaming though it is boomy and we can't play any fps games with those"
12
12
"Súper brillantes en agudos hasta el ounto de molestar. ... los uso en transporte público..."
"the other end of the spectrum was a hot mess."
"Also when there ’s a lot of badly constructed treble in the track, the OG sounds better"
14
10
"There appears to be a massive dip in the upper mids low treble on the castor pro bass ."
"The lower notes are relatively high and the attenuation is fast. You may not feel the lower notes very much. Mid-tone is not noticeable, either."
"The Chu 2s are way better all around than the Castor Pro Bass - way clearer detail, midrange, treble"
3
8
"the castor pro (bass edition) for VALORANT is BULLSHIT."
"Bass version - Best avoid with competitive games, especially Valorant. ... QDC and heavy as well."
"the bass edition is not for gaming though it is boomy and we can't play any fps games with those"
OP...have you looked at Kiwi Ears Cadenza or KZ Castor Pro Bass Edition? Both respond well to EQ. Cadenza's bass is punchy and can satisfy your sub-bass rumble. The Castor Pro Bass Edition allows the user to tune the IEM with onboard switches. It's bassier than the Cadenzas in my opinion. I own both...and I get a deeper and more satisfying brain rattle from the Castor Pro Bass Edition from Angel by Massive Attack and Interlude by Yosi Horikawa. They both provide satisfying thumps to Billie Eilish's bad guy. Cadenzas lose a bit of mid treble detail (for me) on Starboy by The Weeknd. Both sets are currently under 35 USD (your pricing may vary)
r/iems • Budget bass IEM advice? ->I have read...KZ have had QC issues (guess that's the only caveat) My set works as expected. I am getting good bass response from BOTH my desktop dac/amp (Fiio K11 R2R) and off my iphone via a US edition apple dongle. Since you don't mind EQ... some of the planar IEMs out there do play well with EQ. Even the 1st gen stuff... they're not quite sub-35USD range...but they're not prohibitively expensive
r/iems • Budget bass IEM advice? ->I looked at the Artti T10 and the T10 Pro. I decided on the NiceHCK F1 Pro (it was on sale😂😂) Not disappointed at all. I have a set of planar cans...and I was curious about planars in an IEM. Am pleasantly surprised. Hope you get a good set of Castor Pro...I really like mine. The set comes with a tool and diagram for you to tinker with the tuning. Did some time rolling...and settled on DUNU SS tips. Lovely set indeed.
r/iems • Budget bass IEM advice? ->I WHOLE HEARTEDLY AGREE WITH YOUR POINTS: https://preview.redd.it/vwxf7i53neye1.jpeg?width=2377&format=pjpg&auto=webp&s=9aafdf70e38f01e9e6e88692e4c7f79caca103d8 This is MY collection...and I'm very early in the journey. I don't have the budget, knowledge or experience to blind buy a 500USD+ set of in ears that may or may not fit my ears or my preferences. While my journey doesn't completely fit OP's blueprint...I have/had the same thought process regarding purchasing IEMs. Not pictured are the Moondrop Chu 2 and 7Hz Sonus. I started with the Chu 2, 7Hz Zero 2 and Kiwi Ears Cadenza. From listening, watching and reading reviews...I was able to learn about all the terms, labels, and vocabulary to describe what I like or don't like. I threw money at the Wyvern Abyss...I mean...LOOK AT THEM😂. The Kz Castor Bass was a curiosity buy...want to hear if a set touting bass response was really that bassy. My next steps were the NiceHCK F1 Pros, Kiwi Ears Canta and the 7Hz Sonus. The F1 Pros and the Sonu were on sale at the time of purchase...good value and able to narrow things down more for myself. I knew I liked the planar sound...I have a set of open ear planar cans. The F1s felt disappointing (until I tip rolled) The Sonus was about much for my taste (in the mids) The Cantas were quite nice for me. By this point...I had a good grasp of what I was looking for and the direction (s) I want to go in. AFUL Performer 5+2 is currently my go-to...for all around listening. Sourced from R2R DAC lined out into a desktop tube amp. It's like a warm blanket on crisp bright and snowy winter day. I picked up the Hexa because I wanted to hear the hype...and yes...they definitely fulfill the hype and then some. I've EQed my IEMs... especially the planar. They can mimic the sound...but it's only a part of the equation. I now rotate through 3-4 sets at my desktop listening station. The cheapo ones all have 3.5mm out for around the house or for bed. If they break...ill decide if I want to replace. Tip rolling is a journey of itself. Some tips can dramatically change an IEM and rescue it from the bottom of the pile. My Planars now sport foam tips...easing off the treble was huge. Anyway...long post...if you got this far thanks for sticking with my diarrhea of words. TLDR: I agree with the OP
r/iems • How to Actually Learn What You Like in IEMs (and Why One Mid-Tier IEM or EQ Won’t Teach You) ->I vote Castor Pro Bass Edition out of that list. I own both the Castor Pro and the Zero 2. To me...the Castor Pro in UpUpDownDown setting...is a budget bass monster. The mids and treble aren't bad. I find the Zero 2 muddier in the mids...and treble is a bit dark. I needed to use some Divinius Wide Bores on the zero 2 to brighten things up. The Castor Pros (on narrow bores) still have some detail...while providing good sub-bass rumble mid bass hits
r/iems • Which one is the best buy for someone that games & doesn't like too-bassy iems? ->This post sounds like a cry for help...being sucked down the wonderful rabbit hole of IEMs 😂 Agree with the Castor Pro Bass Edition recommendation. Give those a go. Agree about wires being a pain...think strategically hiding wires under clothes help; also deciding which earphone when can be helpful as well. IF you can stomach spending upwards to 170usd (as of this post) there are really good IEM Bluetooth adapters that can work wirelessly. But at that price point Id just stick with the Airpod Pro 2s.
r/iems • 10 years on wireless. One $4 IEM just changed everything. ->I have the Legato....they are definitely bassy. I use wide bore ear tips which allows the treble to come through. They're not muddy...but these aren't for details and shimmer. Great for hip hop, edm, brain rumbly sub-bass. The Castor Pro Bass Edition is definitely more muddy than the Legato. The mid bass is tighter on the Legato as well. Legato is not bad at it's price point...and probably even better if you can find them on sale (I did😉)
r/iems • Which iems would you recommend me next? ->>maybe Something More bassy could be a good pick. What would you have suggested if he had asked for something bassy? I have already used the Kz Castor Pro Bass Edition, but I'm looking to move on from it. Can you suggest iem below $70 to use for longer session music listening?
r/iems • The IEM Pick Mega-Guide PART-1 ->tell me you didn't buy them. don't listen to the other guy. i don't know what games you play but i play VALORANT and the castor pro (bass edition) for VALORANT is BULLSHIT. i originally bought them for music and they do pretty fine but
r/iems • Best iem for gaming? ->I have bass and non bass pro version and when I listen first time I got amazed by non bass version is more refined and clean than the bass version and I return my bass version and keep my harmen target version I don't feel any difference in bass
r/iems • KZ Castor Pro: A Quick Impression and Comparison to the Original Castor. ->I've got kz edx EDC prx castor pro improved bass and I'm getting the kz sagas what do u think about all of them?
r/iems • My ONLY KZ collection (total 20)🤣🤣🤣 ->KZ Castor Pro Enhanced Bass Version (for when you *really* don't want to break the bank)
r/iems • Kefine Delci vs Klean vs Aful Explorer vs HBB Deuce ->If you end up choosing Castor, I recommend you get the Castor Pro for the same price. They fixed some shortcomings of the non-pro version.
r/iems • Best IEM Under ₹2000? 7Hz Salnote Zero vs. Wan'er S.G vs. KZ Castor ->I am using the Castor Pro Bass version (I just leave all switches up, UUUU)
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->With Castor Pro Bass and all switches up, I find the bass too overwhelming in games. I still prefer regular speakers for games even though I have quite a few open back headphones like Philips SHP9500 w/upgraded cool gel pads, Philips Fidelio X3 w/upgraded cool gel pads and Sennheiser HD599SE.
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->Cheap budget bass enhanced IEM would be KZ Castor Pro (Black color which is the bass enhanced version), it is quite popular. It has switches you can play around to fine tune.
r/iems • Best IEMs for heavy Sub bass without major sacrifices ->Castor Pro (Black) is not bad, especially if you like bass music. The silver (Harman Target) version heard that it is not bad also... I think it is the only one in these 3 selection that have 2 x 10mm Dynamic Driver, the other 2 if I remember correctly is single dynamic driver.
r/iems • which one should I get ? ->Castor Pro have a girthy nozzle, might be too much for people with smaller ear canals.
r/iems • which one should I get ? ->Castor Pro (Black) is not bad, especially if you like bass music. The silver (Harman Target) version heard that it is not bad also... I think it is the only one in these 3 selection that have 2 x 10mm Dynamic Driver, the other 2 if I remember correctly is single dynamic driver.
r/iems • which one should I get ? ->Dunno about the other 3, but I like Castor Pro, it is a very enjoyable IEM for the price.
r/iems • Best Bass Iems Under $50??? ->I’m actually a pretty big fan of kz so far. I have castor pro bass edition and kz zs10 pro, and so far I’m loving both of them. My mind was blown at the quality of both, especially for the price. I’ve only had both for a little over a month, but as of right now. I’m a fan 👍🏻
r/iems • Why almost everyone wants to avoid KZ? ->I have castor pro bass edition and love it, I’m somewhat new to the iem community as well. I’ve been switching between my castor pro and kz zs10 pro for the last coulple of weeks, love them both. Welcome aboard the iem train. 👍🏻
r/iems • Just purchased my first IEMs ->Thanks for the review, I have the Castor Bass and Harman and Castor Pro Bass versions, maybe I'll buy the Castor Pro Harman someday
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->Thanks for the review, I have the Castor Bass and Harman and Castor Pro Bass versions, maybe I'll buy the Castor Pro Harman someday
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->Thanks for the review, I have the Castor Bass and Harman and Castor Pro Bass versions, maybe I'll buy the Castor Pro Harman someday
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->Do you think it's worth buying Harman Castor Pro? It's on sale now 🤔
r/iems • Kz castor pro harman vs castor pro bass: absolute comparison review..Which one better? ->I guess for music it depends on your taste Wan er have vocal focus Chu 2 is more fun well balanced and analytical Kz castor pro bass edition is for those who like a lot of bass For gaming I recommend you get the chu 2, it has better sound stage and imaging (I have all those iem btw) it’s my favorite music wise gaming wise and comfort wise (wan er is too big and kz castor doesn’t fit right on me) BUT you should see reviews for all of them and decide based on your taste I don’t recommend the wan er if you think about gaming with it, it’s uncomfortable and fatiguing after some time If you think about gaming over music pick the chu 2 If you like a lot of bass pick the castor If you think about music pick the chu 2 If you think about music but like vocal forward with a little bit extra bass, pick the wan er
r/iems • which one should I get ? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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