Trinity Delta Hi-end Headphones Reviewed

Can the Trinity Delta bridge the gap between budget and pro in-ear monitors?

Trinity Audio Delta
Trinity Audio Delta with tuning filters. Image © Trinity Audio Engineering

As you may already know, the majority of in-ear headphones come with dynamic drivers to generate sound. The main reasons being, they are relatively cheap to manufacture and cover a wide frequency range. However, the makers of the Delta, UK-based Trinity Audio Engineering, have opted for a hybrid system for delivering high-quality sound.

Not only have they used a dynamic driver, but also incorporated a Balanced Armature (BA) into their design. BA's are typically used in high-end gear like professional in-ear monitors. The advantage of using a BA is they can be very accurately tuned to specific frequency bands. This gives more precise audio detail, especially in the mid to highs.

As you might have gathered already, the Trinity Delta is targeted at music fans who want to go beyond budget ear gear, but don't want to spend a fortune doing it. The Delta's retail at around £90 which is approximately $137 at today's exchange rates. They also come with plug-in filters so you can shape the music you hear -- it's a bit like having multi-band graphic equalizers in your ears.

On the surface this makes the Trinity Delta's a very attractive option if you want to step up to BA-based in-ears without having to spend several hundred dollars in some cases.

But, the big question is, "does the hybrid design of the Trinity Delta's really deliver high-quality sound that can bridge the gap between budget and high-end ear gear?"

Features & Specifications

Main Features

  • Custom-tuned Balanced Armatures.
  • Interchangeable tuning filter system.
  • Precision machined aluminum driver housings.
  • Noise isolating construction.
  • 1.2M braided cable using oxygen-free copper.
  • 24 carat gold plated 3.5mm jack plug.

Technical Specifications

  • Frequency Range: 19 - 21,000 Hz.
  • Driver Type: Hybrid system (Balanced Armature / Dynamic Driver (8 mm diameter).
  • Magnet (Dynamic Driver): Neodymium.
  • Impedance: 16 Ohm.
  • Sensitivity 110 +/- 3dB.
  • Headphone type: In-ear.

What's in The Box?

The retail package that Trinity Audio kindly provided for the review contained the following:

  • 1 x Trinity Delta in-ear headphones.
  • 3 pairs of audio filters (Natural, enhanced bass, and treble).
  • 6 spare pairs of ear tips (different sizes including memory foam and silicone).
  • Gold-plated right-angled adapter for 3.5mm jack plug.
  • Cary case.
  • Lapel clip.

Style And Design

As you might expect, the driver housings of the Delta's are made from light-weight aluminum rather than the usual plastic found on budget earbuds. This use of metal gives them a nice solid feel, and the highly polished gun metal color adds to their great looks.

Inside this metal shell you'll find an audio system that takes two audio driver technologies and combines them to create a hybrid system. Removing one of the filter stems reveals a single Balanced Armature with an 8mm dynamic driver behind this. It's quite amazing to see a design that packs all this into a small metal casing.

The Trinity Delta's also come with a good selection of stylish ear tips. You get three different sizes of silicone ear tips (small, medium, and large), two sizes of memory foam tips (medium and large), and one pair of double flanged silicone tips. These are all well designed and finish off the look of the Delta's in a very fashionable way.


So far, we've looked at the driver end of the Delta's, but what about the cable?

Measuring 1.2 Meters in length, the cable has a double-twisted design which feels quite strong to the touch. The braiding used has a slight rubbery feel to it and flexes quite easily. According the company, oxygen-free copper (OFC) is used for the wiring (presumably to inhibit oxides forming).

Overall, the cable is well designed but tends to tangle. However, you get a handy carry case which should, in theory, keep tangles to a minimum during transport. As an added bonus, you also get a right-angled jack connector and a lapel clip. The latter item is a handy accessory to attach to your shirt for example when you need to keep the cable from snagging on things.  

The Tuning Filter System

With Trinity Audio's tuning filter system you can change the sound by swapping filters. This is probably one of the best design features about the Delta's. They simply screw into the main body of the headphone housings. It's a magnificent design that actually works incredibly well. It's easy to fit them. Removing the silicone ear tips is fiddly, but once they're off it's just a simple matter of swapping the filters over.

Trinity Audio provide three different tuning filters to cater for most listening wants. The filters you get are color coded for easy identification and are as follows:

  • Silver (Fun) These are useful to fit if you like more bass in your music. They shape sound in the classic V EQ formation. Bass is enhanced while retaining as much high-end detail as possible.
  • Gunmetal (Smooth) This filter is already fitted out of the box and provides a natural audio balance.
  • Purple (Vivid) If you want the maximum audio detail, then fitting these enhance the top-end mids to highs.

Audio Quality / Tuning Filter Comparisons

The Trinity Delta's look visually appealing and have great design, but how do they sound?

For this test, a mixture of genres were selected in order to see how the drivers responded to different sets of frequencies. The tuning filters were also compared in order to build up a profile of each. 

Visually all the filters look identical. But, that's where the similarities end. Once they are in place you can clearly hear the difference between them. The first filter to be tested was Gunmetal. This is fitted at the factory and gives a nice well-balanced sound with no particular frequency boost. There's plenty of audio detail using this natural sounding filter. The bass may be a little weak if you like Drum 'n' Bass for example, but overall there's a nice smoothness about the Gunmetal filter.

The Silver filters were tried next. These are designed to enhance bass and they do it quite well. The lows are nicely defined and feel punchy without drowning out detail further up. It's quite a subtle enhancement, but certainly a filter you'll want to use for bass-heavy music.

The Purple filters were the last ones to be tested. These were the most impressive out of the three. The level of detail really shines through -- the top end in particular is ridiculous. The treble sound isn't too harsh either. Obviously there isn't much in the way of bass, it's all enhancement in the upper mids to highs. So, if you like to pick out every instrument in an orchestral piece for instance, then these are the ones to go for.


The design of the Trinity Delta in-ear headphones has obviously been a labor of love for the folks at Trinity Audio. Not only do you get a quality hybrid audio system that delivers great sound, but also the level of craftsmanship throughout is mighty impressive. Considering the Delta's current price point, you get a great deal for your money. 

The Delta's comfortably sit between budget and professional in-ear monitors. The level of audio detail you get with these is excellent overall. And, with the tuning filters that are included, you get the option to add tweaks to the audio even further.

If you're looking for in-ear headphones that give great quality sound, then the Trinity Delta's offer a refined audio experience which won't disappoint.