Advanced Sound 747 Review: In The Dead of Night

Advanced Sound is a company that has consistently shown me a willingness to adopt trends when they work, and shuns them when they don’t. Furthermore, they’ve shown excellent judgment with the types of new concepts they choose to incorporate into their products; they never feel half-baked or unfinished. The 747 is no exception to this: while ANC earphones are still in their infancy, Advanced Sound has managed to incorporate very impressive technology and performance into their earphone with minimal (relative) intrusiveness.

You can find the 747 for sale, here, on Advanced Sound’s official website, for $60.

Disclaimer: This unit was provided to me free of charge for review purposes. I am not affiliated with Advanced Sound beyond this review. These words reflect my true, unaltered, opinion about the product.

Preference and Bias: Before reading a review, it is worth mentioning that there is no way for a reviewer to objectively pass judgment on the enjoyability of a product: such a thing is inherently subjective. Therefore, I find it necessary for you to read and understand what I take a natural liking to and how that might affect my rating of a product.

My ideal sound signature would be an extended sub-bass with a leveled, but textured, mid-bass. The mids should be slightly less pronounced than the treble, but still ahead of the bass. I prefer a more bright upper range.

Source: The 747 was powered like so:

HTC U11 -> USB-C adapter -> earphones


Hidizs AP100 3.5mm out -> FiiO A5 3.5mm out -> earphones


HiFiMAN SuperMini -> earphones


PC optical out -> HiFiMe SPDIF 9018 Sabre DAC 3.5mm out -> earphones

All music was served as MP3 @320Kbps or as FLAC.

Sound Signature

Initial Impressions:

The 747 has an easy-to-digest V-shaped sound signature aimed squarely at the music-listening mainstream. It sticks to the tried-and-true formula of heightened mid-bass, slightly relaxed sub-bass, emphasized treble, and increased the presence of vocals. And while this isn’t anything special, it is a very good implementation of a V-shaped sound signature.

Treble: Songs used: In One Ear, Midnight City, Outlands, Satisfy

Treble is boosted and has decent extension, but ultimately fails to reach that ethereal level of sparkle I’ve started to see from some cheaper IEMs like the Earnine EN120. It does still provide a pretty comprehensive sense of spatial placement and provides Outlands with a good amount of air.

In One Ear was a treat to listen to. Despite the fact that I’ve been listening to almost exclusively BA IEMs for a couple months now, I found that the 747, was still admirably quick. Cymbal crashes and high-hat hits all sounded quite good with a decent amount of distinctiveness to each individual slam.

Given that the 747 isn’t aiming to be a clarity king or a treble cannon it should be no surprise that it isn’t sibilant or harsh. It handled even my most poorly behaved songs well.

Mids: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams

While I wouldn’t say that the 747 has any real flaws, if I had to choose something it would be the mids. They aren’t a mushy mess like some ANC earphones I’ve reviewed in the past, they don’t stand out in any particular way, even when compared to other similarly priced IEMs.

Flagpole Sitta sounded decent, but lacked some separation and detail; an artifact of the V-shaped sound signature the 747 has. That being said, it does have a pretty good timbre which makes for a pleasing listen most of the time.

Bass: Songs used: Moth, Gold Dust, In For The Kill (Skream Remix), War Pigs (Celldweller Remix)

Bass is where I think the team at Advanced Sound wanted to focus. It’s emphasized a bit more than on your typical V-shaped IEM and has a good solidity. It’s got a medium attack and decay speed which lends it a very natural feeling.

The 747 was gifted with a very sub-woofer-esque bass signature that is really, really nice. It reminds me of the box I have in my speaker setup. While it doesn’t have crazy extension or a lot of rumble, the mid-bass timbre is excellent and firm.

War Pigs and In For The Kill both sounded pretty darn good. Rich and warm, the bass sort of just washes over you.

Packaging / Unboxing


Construction Quality

As always with Advanced Sound, the build quality on the 747 is excellent. The driver housings are milled from aluminum and look sandblasted.

The front inner face is made of a matte plastic, as is the nozzle. The nozzle has a sensibly sized lip and a good mesh on it to prevent any debris from getting stuck inside.

The cable is terminated with a 3.5mm jack. It is made of a rubberized plastic. It doesn’t have a lot of microphonics. Stress relief on the cable is good all around, from the Y-splitter to the microphone to driver housing. The microphone works well and has a single button for pause/play functionality that worked on both my Apple and Android devices (and works over USB-C to 3.5mm adapters as well).

Placed about two inches from the cable is the ANC module. It is also milled from aluminum. The sides are made from the same plastic as found on the microphone. On the bottom side of the module (left in the above picture) you can find the micro-USB charging port, and on the top (the right in the above picture) you can find the power switch and status light. The status light glows blue when ANC is active and does not glow when it is inactive.


The 747 was perfectly comfortable for me even over longer periods of time. Unfortunately, I do think that listeners with smaller ears may experience some discomfort.

ANC Performance/Battery Life

Battery life and retention is really good for the ANC module. I got to 9.6 hours of active listening time twice and 9.3 another time, falling slightly short of the estimated 10 hours estimated by Advanced Sound. As for performance, the 747 is reasonably good at removing constant white noise from the environment but doesn’t do well eliminating more inconsistent noises like my keyboard. Street noise and the drone of an airplane’s engines are easily removed, but screaming children may not be.


Please excuse the use of a stock image, I seem to have misplaced my accessories picture.

But anyways, inside the box you will find:

  • 1x semi-hard carrying case
  • 1x micro-USB charging cable
  • 1x airline adapter
  • 2x pairs of extra silicone eartips
  • 3x pairs of double-flange silicone eartips
  • 3x pairs of foam eartips

Advanced Sound has never skimped out on their accessories in the past and that hasn’t changed. The silicone eartips are of above-average quality and the foam, while certainly no Comply, does work well enough such that I have no complaints.

But as per usual, my favorite part of the accessory package is the case. It is large enough to fit literally all of the accessories but not so large that it becomes unreasonable to take on the go.


The 747 set out to be a consumer-friendly ANC earphone that anyone can pick up and enjoy. It incorporates an attractive aluminum build, a good V-shaped sound signature, and reasonable sonic performance all inside a $60 package. This is an excellent value for a consumer looking to buy a cheap pair of ANC earphones or headphones, but who doesn’t want to compromise on comfort or sound quality. And while it may not be the king of detail retrieval at $60, it certainly doesn’t need to be to be worth your consideration.

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