Pros: Ergonomics
Great Imaging especially for FPS games
Strong Bassy/Warm tuning
Very Smooth Treble Tuning
No obviously noticeable peaks/dips in the upper mids/treble
Cons: Gets congested quickly with busy tracks
Treble is a technical weak point
CCZ Harmony BC01 Pro
Disclaimer
This review sample was provided by KEEPHIFI in exchange for my opinions.
At just under $27, these enter an extremely competitive segment. CCZ is a fairly new face in the market, so let’s see what they can do.
For those who don't like reading:
Build, Design & Ergonomics
Starting with the cable, things are about what you’d expect at this price. It’s thin, and the coils don’t do much to alleviate tangle potential.
Overall I’m getting very KZ vibes from this cable, with it’s 2-pin TFZ plugs and aesthetics.
The IEM shells overall feel quite cheap and lightweight, but are finished well.
I don’t see any cosmetic defects, the parts fit together properly and the addition of a metal nozzle at this price is always good to see.
You get three sets of silicone tips, each with an extra raised ring around the opening.
I don’t know if there is any function here, but at least makes it easy to distinguish them from other tips.
The design features some extremely small printed text that I struggle to read with the naked eye.
The green jewel-cut aesthetic is let down by the flat surface on top which washes out the effect in certain lighting conditions.
In hindsight, I think I should have picked the black colour, but I’m also tired of the same blacks, greys and polished metals, so I still don’t have regrets about the colour choice.
As for ergonomics, they’re superb.
They are probably the best fitting IEMs I’ve ever used under $100 and easily the best I’ve worn under $50.
So if you have ears that prefer the general shape used by Kiwi Ears IEMs, these should be a very good match for you.
The Sound
Let’s do things differently and start by taking a look at the graph, because it’s completely wrong.
For whatever reason, the miniDSP EARS either can’t measure this one properly, or my personal HRTF is just weird and inconsistent.
If we go by this graph, it appears to have less bass than the Kiwi Ears KE4 and the Simgot SuperMix4, and includes a significant canal-gain peak.
I don’t hear either of those things that way.
The CCZ Harmony is bassier than the KE4 and has, according to my ears, very little boosted canal-gain.
The tuning is excellent.
If you’ve recently bought or heard the TRUTHEAR x Crinacle ZeroRed and wished they had more bass, the CCZ Harmony is a very strong contender with a bass shelf that is sub-bass focused on, and just starts to bleed into the mid-bass, so it won’t work with all recordings/genres/artists etc.
While we’re on the topic, I also thought the ZeroRed had almost no imaging and a discernably miserable soundstage.
The CCZ Harmony possesses the opposite!
Quite frankly I’m quite shocked with some of the CCZ Harmony’s technical performance.
In terms of resolution, it does fall behind the pack a little, with bass that does start to lean into bloated territory, but mostly remains thumpy and energetic for most music genres, and a treble that is simply just there, but smoothed out and inoffensive.
It didn’t wow me with micro-details or an airy spaciousness, but more importantly it was never piercing or forced the so-called dreaded ‘BA timbre’ down my ears.
The little bit of ear-gain that I heard only helped push vocals and guitars incrementally more forward in a tasteful way.
So, if we look at technicals, the detail retrieval potential fits this price category:
• The tuning is punching quite well above the price.
• Imaging is punching up with some of the better IEMs around.
• I was shocked how well these perform for FPS games, with positional cues being very accurate in all directions.
• The only category I would mark these down is the separation.
These tend to get congested with more complex music, especially things like bass heavy hardcore metal quickly becomes very fuzzy with fast ripping bass drums.
Also depending on the timbre of the bass drum or bass sound, it might either sound fine, or bloated.
They tow that line, but directly on the line. So you either have to listen at lower volumes for some tracks, or stick to mid-bass light music.
Comparisons
KZ HBB PR2
Almost tuned as opposites. The KZ is lean and too crispy up top, with a lean dry bass. The CCZ is thick and bassy and slightly dark with a lot of slam.
BLON BL02
For a little more money, these give an objectively better tuning with clearer bass and higher quality metal shells, but a worse cable and inferior imaging and positional accuracy.
As I mentioned previously, the KE4 and Supermix4 both have a tuning that is closer to Harman target.
If I was doing any kind of serious music-listening session, of course there wouldn’t be a single time I would pick up the Harmony over those two.
Everything suddenly becomes more agile and individual sounds become more distinctive and not blurred together.
But these IEMs cost many times more, so let’s keep things realistic.
Conclusions
I’m almost tempted to get some wireless Bluetooth adapters to use with these for the gym or for when going out for a run.
I think the combination of extra slamming bass and solid fit is exactly what it calls for.
Side by side, it’s clear that from the mid-bass up through most of the midrange, the sound is slightly blurred compared to the KE4 and SuperMix4, so I would also recommend using the Harmony with simpler music, or just keep them in your gym bag.
I’m more than happy to give these a recommendation.
If this is what CCZ can achieve under $30, I can’t wait to see what they can pull off in the future with a bigger budget.
I can especially recommend these for ultra-budget FPS gamers who need superior imaging and spacial cues, and moderate bassheads.
CCZ BC01 Pro Harmony - Solid budget-option for bass heavy seeker
Pros: + Good warm-ish "Vshape"
+ Calm non sharp treble
+ Bass heavy will enjoy this set
+ Comfortable and pretty nice design
+ Non fatigue uppermids
+ Easy to drive!
Cons: - Treble roll-off makes some instruments sound blurry
- Not best choice for intense, complex tracks
- Limited accessories and a cable quality could be better
CCZ, a sister company of Kbear, specializes in entry-level products with competitive quality. recently they released two model, Duet BC04 Pro, and BC01 Pro called "Harmony" which I review today, with Hybird 1DD+1BA configuration, let's find out how this entry iems sound like.
The package is very compact similar to any CCZ product,
inside you find.
>IEMs
>The cable
>Eartips
>Manual and warranty paper
The included accessories are minimal, consisting of 3 sizes of ear tips and the cable is also similar to other model DC02.
Design & fit
The design of this iems is pretty nice, with the faceplate features a crystal cut design, reflecting gemstone alike. to me the fit is comfortable and the isolation is also quite nice.
BC01 Pro uses a TFZ connector, which honestly i do like it more than qdc, so if considering replacing cable the 0.78mm 2Pin pretty much suitable, but the connection can be weaker, so be careful not to damage the pin.
In my opinion this IEMs easy to drive and can be directly plug to the phone.. i also recommend to replace the stock ear tips, with something like wide bore, or liquid one like epz m100 or softears uc is matching.
Sound quality
BC01 Pro, has a sound character with a deep low-end rather the typical bright piercing "Vshape"
Bass
For me the bass is a strong point, in comparison to some products within the price range that use a single DD, The low end is notably deep and full.. with the subbass quite felt, the midbass also have decent amount, in my opinion bass line and drum beats have sufficient attack and expansion. compared to DC02 the bass is notably tighter with minimal bleed..
Midrange
The low-mid has enough note weight that makes male vocals sound pleasant, however there are dip in the center area at 700hz to 1khz, making the midrange feel a recassed, which makes it slight muddiness in some tracks, yet for around 1khz above this iems showing its capabilities, especially for female vocals it has a more clear and open, without any disturbing peaks, so it's comfortable for long listening season.
Treble
The high frequency tune to be calm, but still present, and the result there's no sharpness that some BA drivers can produce, but resolution and resonance are somewhat moderate, which make it lacking when listening to classical and rock songs, particularly with distorted guitar effects, it can be overlapping and slightly blurry, but overall they're safe and has enough clarity when listening to many modern music.
Technicalities
For a budget offering, the soundstage is respectable; it projects outside the head clearly, The imaging also solid, I tested it for gaming like Valorent, CS2 it's still commendable, however the detection range feels a bit narrow, so I don't really actively recommend it, but it was usable for a basic level, When listening to many tracks, it maintains its sense and depth..
Pros:
+ Good warm-ish "Vshape"
+ Calm non sharp treble
+ Great bass performance
+ Comfortable and pretty nice design
+ Non fatigue uppermids
+ Easy to drive!
Cons:
- Treble roll-off makes some instruments sound blurry
- Not best choice for intense, complex tracks
- Limited accessories and a cable quality could be better
Conclusion
This iem is well-suited for genres like Electronic music, R&B or other bass-heavy tracks.. also for many band that don't overuse distortion, it does sounds good. however, they may not be ideal for classical or rock that requires intensity and extended high frequencies. For those who delve high resolution, this isn't main selling. but considering the price this great option if seek an entry iems with good bass performance..
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