General Information

1.Product Name:TRN TA Knowles Hybrid In Ear Earphone
4.Earphone type:In-ear
5.Impedance: 16Ω
6.Earphonesensitivity: 117dB/mW
7.Frequency range: 10-40000Hz
8.PlugType: 3.5mmStraight Plug
9.Cable Length: 1.25m
10.Color: Silver
11.Whether with cable: Yes
12.Earphone interface:MMCXInterface
13.Whether with mic:Optional
14.Whether can replacement cable: Yes
15.Driver unit:1BA+1DDhybrid driver unit (Super-sizedKnowles 33518,8mm Dynamic)


Latest reviews


New Head-Fier
The new TRN TA - a more Warm and Bassy TA1
Pros: Warm and Bassy Sound Signature
No sibilance noted, safe tuning for wide genre of music
Normal IEM shape, better fit and isolation preferred
Cons: Midbass bleeds causing nasal vocals
Early treble roll off, can be better if not the case
Plastic resin not as premium material from former metal alloy [TA1]
TRN TA - 1DD [8mm dynamic] + 1BA [knowles 33518]

Disclaimer: Thank you and kudos to TRN and Sir Larry Fulton for arranging this review unit, based on own observation with no affiliation nor obligation.

Packaging / Presentation

IEM is built in resin and similar to the MT1 shell , 0.78mm 2pin TFZ raised connector preferred, end with 3.5SE L shaped, accessories is minimum, normal slight improved stock black TRN cable, 3 pairs silicon tips.

Equipment used :
iMac - Linux - RPI4 8GB - Volumio Tidal Connect - Topping DX3PRO - L30
iMac - Linux - RPI4 8GB - Volumio Tidal Connect - ifi Zen Dac v2.0 - Xduoo TA05 Tube Amp
Sony walkman A55 3.5mm SE / Fiio M9 DAP 3.5mm SE, 2.5mm Bal
LG G7+ / Samsung Note8 [UAPP / Tidal] 3.5mm SE, Samsung Dongle, X1, CXpro

Music Tracks - variety of pop, jazz, country, instrumentals, audiophile male/female, chinese / cantonese favourites.
Some of tracks used -
Dire Straits - Tunnel of Love, Billie Ellish - Happier Than Ever, Aha - Hunting High and Low, Camomile - Fields of Gold, Chicago - You are the Inspiration, Depeche Mode - Strange Love, Eagles - Hotel California, Ed Sheeran - I Don't Care, Fleetwood Mac - Big Love, Glass Tiger - Thin Red Line, etc..

Sound Impression / Comparison with TA1 and TA2

Tonality is warm and bassy with good mid bass and little sub bass rumble. Bass Quantity over quality, ie. can be better, speed is normal, when especially play back a very Bassy and Busy instruments track, mid bass bleeds occur. Vocals can sound a bit nasal. Weight tone is good and forward sounding Imaging and instrument seperation is good average based on the performance of the knowles 33518 BA.

TA1 is more mid centric with more crisp clear and clean vocal [both male / female]. TA has more midbass, bass will sound more full and slam, but bleeds into vocal occurs. [similarily the case for TA2]. TA soundstage will sound wider and better extended than TA2.

Timbre is quite natural sounding with a tint of metallic, very slightly. Male / Female vocals presentation is acceptable in most tracks, except when tracks that are heavier in bass [bleeding can be heard, vocal sounds nasal].

TA1 timbre sounds more organic and natural as compared to both TA and TA2.

TA Soundstage is normal wide and acceptable. Width, height and depth performs better than TA2, treble roll off somehow affects the sparkle and airyness, just slightly. Both TA and TA1 soundstage sounds and appear wider than TA2.


TRN TA is positioned as the most budget wise set in the TRN TA series. For a warm and bassy sound signature with no sibiliance at this price point is a good consideration for a wide range of music genre as well. TA2 with 2 knowles BA is a better and pretty attractive IEM with focus in its weight tone and concentration in sounding but sacrifies a bit soundstage in return. Mid bass bleed and early treble roll off are both the traits found both in TA and TA2. For those more into mid centric vocals the TA1 is still the best choice IMHO.

Last edited: Nov 11, 2021


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New Head-Fier
TRN TA-1DD [8mm dynamic] + 1BA [knowles 33518]

it's my first time to use head-fi and I Don't know how to add images so let's start with my experiences in TRN TA

I bought the TRN TA in Shoppee 11.11 sale with my own money and honestly, I have mixed emotions about this IEM

It's a V-Shape type of sound signature

Bass in this pair is good. It’s punchy and has that decay that bass-heads consider
When it comes to this mid-bass region, I felt that TRN made the bass out of control because it’s bleeding in busy tracks which are noticeable. It’s just too prominent for me to deny.
The speed of this bass is average, neither fast nor slow. I think this is running at a normal pace.
I can tell that TA's bass is average. It should be suitable for casual listening or gaming and movie watching.

In terms of mid, the vocals are quite clear sounding. You can hear the vocals standing out fine in the mix, but in busy tracks they become nasal.
The instrument separation in this pair is okay-ish. You can hear the placements of the instruments in the mix.
If you are a mid-centric listener this is not what you would enjoy listening to. The fact that this tuning lacks emphasis and detail disappoints me, to say the least.
Instruments feel average. As a former unprofessional violinist, I feel the violin sounds artificial and not natural. It’s like the violin here is electrical.

The treble region of this pair is quite good, with no harshness or treble peak being spotted whatsoever. It's good for long listening sessions. Sometimes it has a noticeable roll-off but feels natural nonetheless.

The soundstage in this pair is wide. You can feel the whole band playing in your ears.
The imaging in this pair is okay. Clarity is okay. Data retrieval is fine.

To wrap this up, TRN TA is an all-rounder IEM that is safe for treble-sensitive people like me who casually listen to this in-ears. Were you to ask me whether I will keep it in my collection, my answer would be “Probably”. Honestly, there are better IEM in this price range, such as this pair’s predecessor, the TA1. In case you are not a picky consumer, this might be your option.

Warm, bassy signature
No sibilance, safe for treble sensitive ears
Typical IEM shape
Sound isolation is good



Mid-bass bleeds in busy tracks
Nasal vocals in busy tracks
Lacking color and imaging
Underachieving mid
Out of control bass which decreases the pair’s bass quality
Nasal mid
Cheap plastic resin
Stock ear tips
2-pin type connector