Revolutionize Your Audio Experience with the 64 Audio A4s
The 64 Audio A4s is your gateway to auditory bliss. Four groundbreaking drivers and a slew of cutting-edge 64 Audio technologies like Apex, tia, and LID combine to guarantee extraordinary fidelity for a sound experience you'll never forget.
What's In The Box?
Everything you need is included with the 64Audio A4s IEMs!
- A4s Custom In-Ear Monitors
- 64 Audio Personalized Protective Case
- Dehumidifier
- Cleaning Tool
- Shirt Clip
- 48" or 64" Detachable Professional Cable
- m20 apex Modules
- Round Sticker
- Product Manual
Experience Unbeatable Fit and Comfort with 3Dfit - 64Audio A4s
The A4s custom IEM features 64Audio's patented 3Dfit technology for guaranteed fit and comfort.
3Dfit is a revolutionary process that ensures your ear molds are reproduced with astonishing accuracy while integrating acoustical tuning features in the IEM shell for sound precision and comfort you just won't get with any other custom IEM.
Hear Every Note with Outstanding Naturality and Clarity
The A4s is only the second custom in-ear monitor in 64Audio's stable to feature a dynamic driver hybrid setup. Paired with 64Audio's patented tia system, the A4s delivers a complete high-quality sound experience that's perfect for both professional audio work or casual listening.
It is well-known that a dynamic driver delivers some of the most natural and visceral sounding low-end of any driver type. With a special dynamic driver driving the A4s' bass, you'll experience deep rumbles like never before and feel a powerful punch in your favorite music.
On the other hand, 64Audio's tia open drivers and open bore design deliver outstanding clarity and immaculate details for a truly immersive sound experience like no other.
Listen to Your Favorite Tunes Longer - A4s Apex Technology
IEMs can cause discomfort over time, caused by unavoidable pressure buildup typical of the air-tight seal created by in-ear monitors to ensure proper sound delivery.
You'll never have to worry about discomfort with the A4s. The glove-like fit created by the ultra-accurate 3Dfit shells is enhanced by 64Audio's revolutionary air-pressure release system called Apex.
Apex vents extra air from the sealed ear canal to ensure you don't suffer from discomfort caused by pressure buildup over time. The result is unbeatable comfort for distraction-free extended listening sessions and a more natural and immersive soundstage.
Pure Sound No Matter the Source - LID Tech
Your audio source affects the sound quality of your in-ear monitors due to varying electrical resistances in multi-driver in-ear monitors.
With Linear Impedance Design, you'll never have to worry about inconsistent sound quality on the A4s.
LID ensures the dynamic driver and Balanced Armatures in the A4s remain faithful to the original sound signature so you can experience only the purest sound - no matter your source. Whether you're using your smartphone, bodypack, DAC/Amp, or DAP, rest assured you'll hear every note with precision and accuracy on the 64Audio A4s.
64Audio A3t vs A4s
A3t:
Drivers: 3 Drivers
Impedance: 11Ω @ 1kHz
Frequency Response: 20Hz – 20kHz
Sensitivity: 109 dB/mW @ 1kHz (105mV)
A4s:
Drivers: 4 Drivers
Impedance: 11Ω Nominal
Frequency Response: 10Hz – 20kHz
Sensitivity: 107 dB/mW @ 1kHz @ 1mW (94mV)
Our Analysis:
- The A3t features a warm-neutral tuning with decent detail retrieval and a fun bassy sound, making it perfect for casual audio listening.
- The A4s is tuned to deliver some of the best bass response in its price range, making it the perfect in-ear monitor for listening to mainstream music music like Pop or Hip-hop.
64Audio A4s Price
The A4s is a premium custom IEM from 64Audio. Priced at $1,099, the A4s delivers a fantastic low-end response for listening to bass-heavy music.
64Audio A4s Specs
| Specification | Description |
| Driver Type/Count: | 1 dynamic low, 1 BA low-mid, 1 BA high-mid, 1 tia high |
| Frequency Response: | 10Hz – 20kHz |
| Sensitivity: | 107 dB/mW (94mV) @ 1kHz |
| Impedance: | 11Ω @ 1kHz |
| Crossover: | Integrated 4-way passive crossover |
| Isolation: | 20dB w/ m20 module, -15dB w/ m15 module. Ships with M20 Module standard |
