Disclaimer: The A12t by 64 Audio was provided free of charge for this review. 64 Audio is not a site advertiser and is not affiliated to Headfonia. Many thanks for the opportunity and generosity.
About 64 Audio
64 Audio is a US based company that specializes in making custom and universal in ear monitors, but has recently dipped their toes into making studio/live belt packs. As you can find out in the interview we did with them a few months back, 64 Audio started out as 1964 Ears and has renamed themselves. Their core of employees are the Belonozhko brothers who all manage different departments. They have been around for almost eight years already, and have started out because of a project their CEO, Vitaliy, has been working on – an in ear monitor for his wife. This project later on became what we know today as 64 Audio.
They are also one of the few companies that bring out one technology after another. They have introduced TIA (Tubeless In-ear Audio), APEX (Air-Pressure Exchange) and LID (Linear Impedance Design),all of which can be found in this custom in ear.
You can consider TIA as some sort of hat-less balanced armature driver that fullfils its job in a special sound-chamber and doesn’t put out sound via a regular tube and dampener system. This way the treble frequency response is more extended and the resonances of the tube are eliminated, giving a more enjoyable listening experience.
APEX is an interchangeable system that drastically reduces the pneumatic pressure on the eardrum, which can be found on regular custom IEM designs, and therefore enhances the safety of your hearing.
LID is a new technology by 64 Audio that was introduced with the A/U12t and Tia Trió. It is responsible for an almost flat impedance curve of the IEM, enabling it to be completely uneffected by varying output impedances of sources. This comes in very handy for touring musicians, producers and audiophiles that connect their A12t to an array of different gear. LID and its impedance behaviour enable A12t to always sound the very best, no matter the source it is connected to. Vitaliy Belonozhko has also sent me some measurements to better visualize LID, you can find them at the end of this review.
64 Audio also is one of the few companies that 3D prints your custom IEMs. It works like this: you take your regular impressions at your trusted audiologist, send them to 64 Audio, they scan them with their hardware, edit the scan to make it printable as a custom in ear and then 3D print them. The entire process took close to three weeks for them to finalize my A12t.
64 Audio also closely works with many professional musicians, artist such as Alessia Cara, Seal, Bon Jovi or Beyoncé are known as their clientel. This definitely says a lot about their reputation.
The 64Audio A12t is the direct offspring to 64 Audio’s former flagship, the A12. It is a revamped version of said model and now features the incredible TIA high drivers. This TIA high driver sits in the nozzle of the monitor (see pictures).
The A12t uses twelve balanced armature drivers per side. The configuration is as follows: four low-drivers, six mid-drivers, one high-mid and one proprietary TIA high driver.
On tech specs the A12t is rated at 12.6 Ohms impedance with a sensitivity of 108 decibels per Milliwatt. It uses a passive four way crossover design and has a frequency response from 10 Hertz to 20 Kilohertz. Their center-driven balanced armature drivers are said to reproduce deeper and more dynamic bass. That’s something we will take into consideration for the Sound part of this review.
It also comes in the universal form of the U12t. This one has a generic aluminium shell that fits right about every ear out there. My personal preference goes straight to custom though, and I am very happy to review the custom fit 12t.
The current build time of a custom A12t is five to six weeks.
The review continues on Page 2