Custom IEM Model Overview
A12t didn’t just inherit technology from other innovative models; it introduced the world to our LID™ technology. A12t, U12t, and Trio all released together and came with a solution to a real-world problem that has plagued audio systems for a long time.
In the real world a non-linear impedance manifests itself in differing frequency responses across devices. You could listen to a track through a wireless IEM pack one day, then listen to that same track on your laptop, phone, or through a quality sound-card and the track could sound different on all of those devices if the output impedance of the headphone amplifier differs in all of those devices. We developed a groundbreaking technology called LID to solve this problem. LID stands for Linear Impedance Design, and a few years after its release we received a patent for it.
LID has proven so effective that we’ve built it into every product release since 2017, following our trend of democratizing our technology within our product range.
This is one of our three CIEM models that finds itself in use by mixing engineers both live and in the studio, the others being A18t and A18s. It differs from A18t in its softer presentation of a mix. You can think of them similar to how our customer base has naturally segmented between these two. A12t leans more in the direction of a mixing engineer’s monitor while A18t leans more towards mastering.
A12t is balanced, accurate and extremely musical. What do we mean by musical? It’s our best way of articulating an IEM’s ability to present a mix in an engaging yet non-distracting way; getting enveloped into a song or performance while trusting that what you’re hearing is correct.
Lows are punchy, more than enough headroom to satisfy drummers and bass players. The low-end has enough amplitude to spare in case you want to use A12t with one of the other apex™ modules that will slightly reduce it.
Low-mids present just enough “body” without tipping the sound into being “warm,” unlike A18s which is on the slightly warmer end in this regard.
Mids and high-mids are articulate without being too detailed, this is where A12t and A18t differ the most. Highs are beautifully extended and airy because of the tia™ driver that resides in the very tip of the canal.
The sound-stage, which is the perceived width of the stereo field, is in-line with the rest of our reference-grade IEMs. Apex™ and tia™ both contribute to our IEMs’ impressively wide imaging compared to other IEMs and headphones. This distinctive feature surrounds the listener more naturally and improves instrument separation when monitoring live; like your pan nobs are able to rotate further to the left and right.
A12t has also dictated the sonic direction of some of our other models like A6t, A3t, and A3e. Although you’d see a significant reduction in fidelity and instrument separation, they follow a very similar frequency response pattern.
The A12t IEMs are incredibly well balanced, with excellent bass representation, and an ideal solution for those who are concerned about portability.Ryan McCambridge (Sound on Sound contributor, freelance engineer, producer and sound designer)
The sound across the spectrum (frequency response spec’d at 10 Hz to 20 kHz) is spacious, smooth, and not strident. When a mix is right, I can hear every single detail with the A12t, and all sounds are three-dimensional to my ears. There are elements in songs that I’ve heard all of my life that I was totally unaware of until I tried these IEMs.Lars Fox (Grammy nominated music editor)
I love the A12tMichael Brauer (Grammy winning mixing engineer)
Thanks again for the 12T’s. I absolutely love them.David Bottrill (Grammy winning record producer)
Gotta say, these are blowing me away. Thanks so much foe making it happen…. The only problem I’ve had is that when I started listening to a record I’m in the middle of, I was hearing all this stuff I had missed…. very humbling. Should have done this a long time ago!Justin Niebank (Grammy winning mixing engineer)
For me, I really dig them. I did some mixing with them…and I think they are outrageously good.Billy Bush (Grammy nominated record producer)
Joel, Luke (for KING & COUNTRY) and I were able to stand on common ground sonically checking mixes for this last record (burn the ships) while all being in different parts of the world. The 12t in ears made that possible.Tedd Tjornhom (Grammy winning record producer)
Duuuude, they are amazing. The molded units really improve the bass response and imaging. I mastered several songs in them this week without ever checking on our PMC speakers and all were approved with no notes.Alex Dobbert (Mastering Engineer)
I have had reason to finish some mixes just on my a12t’s with no access to my normal monitors. I felt really good about the mixes, and became unaware that I was wearing inears, just in the flow of mixing. Hearing everything I needed to hear.Ainslie Grosser (Grammy winning mixing engineer)
Custom-Fit, Custom-Look, & Custom-Made
Each 64 Audio CIEM is hand built in Vancouver Washington by highly specialized technicians.
Ear impressions are first trimmed and scanned into our 3D detailing software. Our patented 3Dfit technology is used to perfectly recreate the intricacies of your ear shape. We virtually accommodate for all of the internal components before 3D printing with hypoallergenic acrylic material.
Once the shell is printed our assemblers insert the pre-soldered driver packs associated with the model of the IEM.
The assembled CIEMs are later completed with a faceplate. Along with the 5 shell options, there are dozens of faceplate colors and materials which translates to hundreds of variations. On top of all of those options we’re also able to use custom artwork to make your IEMs truly one-of-a-kind.
- Transducer Type/Count: Twelve precision balanced armature drivers
- Transducer Configuration: 1 tia high, 1 high-mid, 6 mid, 4 low
- Bore Configuration: Single
- Freq. Response: 10Hz – 20kHz
- Sensitivity: 108 dB/mW
- Impedance: 12.6 +1/-2 Ω from 10Hz – 20kHz
- Crossover: Integrated 4-way passive crossover
- Isolation: -20dB w/ m20 module, -15dB w/ m15 module
Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal. In addition to relieving air pressure, it also maintains standard IEM levels of noise isolation. The attenuation of ambient noise and pressure relief enables musicians and music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage. Apex comes in three module variations available for A12t: mX, m15 and m20.
Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. A12t features two major elements of the tia system: the tia driver and the tia single-bore design.
3D-Fit preserves the detail of your ear impressions using a new process of digital rendering and 3D-printing. The patented process of incorporating acoustical tuning features within an IEM’s shell allows for designs that would otherwise be impossible to build using traditional methods. We incorporate these advanced and uniquely complex features into the shell in order to manipulate the audio produced by the IEM. This process also reduces distortion in the impression for the most precise and comfortable custom in-ear monitors available.
Linear Impedance Design (LID) is a patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets comprising this nine driver IEM. Varying source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically results in varying frequency response across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound.