64 Audio Solo – Full-Range Sound from a Single Driver

At the heart of the Solo is a revolutionary 14.2mm planar driver that expertly delivers clear, balanced sound across the entire frequency spectrum. Whether it’s the deep bass, smooth mids, or crisp highs, you’ll hear every detail with stunning clarity and richness.

64 Audio has always been at the forefront of innovation, and with Solo, they’ve taken things to the next level. By being the first in the world to intergrate Helmholtz resonators into an IEM, 64 Audio has achieved something truly remarkable. This acoustic chamber, along with the use of two finely tuned Helmholtz resonators, sculpts the sound for deeper lows and cleaner highs, creating an experience unlike anything else currently on the market.

Innovation You Can Hear and Feel

Comfort and long-term listening enjoyment are essential for any high-end IEM, and Solo delivers on both fronts. Thanks to apex (Air Pressure Exchange) technology, pressure inside your ear is relieved, significantly reducing ear fatigue while also enhancing the sense of spaciousness in the sound. Whether you’re listening to music, watching a movie, or gaming, Solo feels as good as it sounds.

A New Look to Match the Performance

The Solo isn’t just an audio powerhouse—it’s also features striking design update. The most significant from 64 Audio since the launch of the Fourté. Its sleek, modern look is the perfect match for the cutting-edge tech inside. Making Solo not only a great-sounding product but also a stylish one.

One Driver, Limitless Possibilities

The 64 Audio Solo achieves what was once thought impossible in portable audio. By harnessing the potential of a single planar driver, 64 Audio has opened a new chapter in IEM technology. In the same way that Fourté set a new standard with its multi-driver configuration back in 2016, the Solo challenges conventional wisdom by proving that “less is more” when done right.

For audiophiles, musicians & professionals seeking uncompromised detail and a robust low-end response in a portable, comfortable design, Solo delivers an experience unlike any other IEM on the market. Avaliable October 2024

Experience the 64 Audio Solo and discover what’s possible when innovative design meets extraordinary sound.

Tech Specs

• Transducer type: 14.2 mm Planar Magnetic Driver
• Frequency response: 20 Hz – 20 kHz
• Sensitivity: 100 dB/mW @1kHz
• Impedance: 16 ? @1kHz
• Isolation: -12 dB
• Cables: 3.5MM + 4.4MM / OCC Copper / 25 AWG+ 23 Wires / 0.26 ?

Interested in 64 Audio? Read more news and reviews here!

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For many a year, we’ve had great fun at the expense of the music fan on the move; what about those roller skaters with half a coconut over each ear? Then of course there’s the Atlas figure with a ghetto blaster and curvature of the spine, and who can forget that legion of listeners with those white buds of mediocrity?

“Darn these Confederate batteries!”

For some however, no compromise is acceptable; great sound quality just has to be paramount. A lump in the trousers causes no embarrassment in such cases. So who exactly is trying to get these big things in our pants?

There’s a wide selection of portable bits and bobs as we all know; with the more static listener, there’s known to be an entry or ‘low’ end of the market and a high end. Portable devices, by the nature of who they’re generally aimed at, are mostly built around price and convenience; some of them only accepting MP3s or similarly lossy file formats.

Apple’s recent impact on the portable audio market is well known, and although their products have a fair reputation for out-of-the-box audio quality, it’s very difficult to satisfy all scrumpers. Due to the success of Apple’s fruits, other manufacturers deem it worthwhile designing ways to improve the sound quality of these devices.

It’s well known that a low-cost cable can be attached to a 30-pin connection which provides a line-out signal; a signal which bypasses the internal amp of the iDevice, to be fed into an external amplifier. This can give sound quality a boost, certainly where less sensitive headphones are involved. Line-out lightning connectors for newer devices are available via Apple, but they ain’t giving them away.

However, this cuts little ice with those who strive for their jive – Apple’s DAC is still doing the conversion to analogue. Perhaps understandably, Apple would not have such a marketable product if all components were as high-spec as possible, and the DAC is no exception. It’s to get the job done adequately.

Apple has been protective in the past when aftermarket manufacturers wanted to get in between their rind and pips; indeed a hefty royalty has been required should anyone want their product to truly interface with the iDevice’s software. This has affected the price of available gadgets greatly; hopefully this is changing.

Fostex’s HPP1 is one example of a DAC which will decode music on an iDevice, but here we will compare two high-end arrangements provided by Cypher Labs and Just Audio.

..The Theorem 720 with iPod Touch

On one side we have the new Theorem 720 from Cypher Labs; an all-in one solution providing both digital-to-analogue conversion and amplification. On the other, we have the Cypher Labs Solo -R, with separate amplification provided by Just Audio’s A-Class AHA-120. How do these compare, and is the extra bulk of a separate amp (and extra connections) worth it?

The headphones I used for this are at a similar level – the effortless Beyerdynamic T1. Being a semi-open headphone, these are not the first choice for portable use but are excellent for judging the subtle differences in sound quality between high-end rigs, and for  illustrating how powerful the amps are.

The Theorem 720 blew me away with its accuracy and power, but the latter depends on the mastering of the recording. For instance Aha’s ‘Take On Me’ (what better to test this against the AHA-120?) was blisteringly loud, but Queen’s ‘Another One Busts the Dust’ needed more headroom. Of course, the T1 headphones are rated at 600 Ohms with 102 dB sensitivity, so the bar’s unrealistically high for portable power requirements. It gives a good comparative impression though.

Bass was present and under good control. The mids had great detail and strength, and the highs were crisp and clean. Soundstage and separation were very immersive, and I was very impressed with what I heard. However, specialist interconnects such as those supplied by ALO Audio were not used, just the standard 30-pin to Micro-B USB connection provided with the Cypher Labs unit.

It’s not hard to imagine that a plethora of high quality interconnects will be available soon for the Theorem.

..Just Audio AHA-120 with the Solo –R and iPod Touch

So then I popped on the T1s with the same 30-pin iPod – now with a Cypherlabs Solo -R, and the Just Audio AHA-120 headphone amp. There was an ALO Audio interconnect between the iPod and Solo -R, and an iBasso 3.5mm to 3.5mm between
the Solo -R and AHA-120. This rig has a slight advantage here.

The bass was a little more present, but by no means excessive. Mids were more recessed than with the Theorem, and high frequencies not so clinically accurate. The soundstage was a little narrower too.

But for all that, I far prefer the Solo -R/AHA-120 combo as it sounds so effortless and natural. The difference is like that of spandex and silk. Spandex is functional, comfortable and easily cared for. Silk on the other hand reqiuires a little more TLC and is expensive. But all that trouble seems unimportant when hitting the town with my silk shirt on – the pleasure of wearing ultra-stylish, comfortable and cool fabrics makes all that seem unimportant.

And so it is with the Solo -R/AHA-120. Even the sound of fingernails scraping the surface of a blackboard would create a large smile across my face when heard through this rig.

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