Bluetooth vs Wired Audio Sound Quality (2024)

On the 7th of September 2016, technology giant Apple® announced the iPhone 7, and along with it something seemingly inconceivable to music lovers and tech-heads alike: the removal of the 3.5mm headphone jack.

In a move that stunned the internet, people’s reactions to the news ranged from puzzled through to suspicious, and in some cases, just plain angry. For many music lovers, a world of great-sounding wireless Bluetooth audio seemed unimaginable.

Of course there are still plenty of wired options for your music, but today the real question remains: is Bluetooth audio as good as its wired counterpart?

Yes, it absolutely is – but certain factors need to be taken into account.

A matter of time

The first ever stereo Bluetooth headphones were released in 2004, and in a landscape dominated by Apple’s cool-affirming white wired earbuds, people may have dismissed the design, their eyebrows sceptically raised at the cans’ reliability and audio quality.

When it was first introduced, Bluetooth streamed music from your headphones to your device at 328kb/s – a rate that sits just under mp3 quality sound, and well below the standards of audio enthusiasts.

To enable this data to pass from one device to another, Bluetooth relies on SBC (low complexity subband coding) compression to ‘fit’ your music through the technology’s imaginary ‘thin pipes’ – once again, resulting in less detail heard in your music. This doesn’t sound great for true music lovers.

But as time progressed, so did Bluetooth.

In 2009, a technology called Qualcomm® aptX™ Bluetooth was introduced to consumer electronics. Using a different kind of compression, it allowed higher quality audio through the narrow Bluetooth bandwidth. aptX allows CD quality (16-bit/44.1kHz) audio streaming, a bitrate that fits more in line with the standards of us audio enthusiasts and music lovers.

However, numbers are just numbers. How do they ultimately convert to a meaningful listening experience?

The test

With the help of drum and bass duo Sigma, British TV journalist and technology expert Jon Bentley decided to compare the difference between wired connectivity, conventional Bluetooth and aptX.

Both Sigma members had differing conclusions: Joe preferred aptX audio but Cameron preferred standard Bluetooth over aptX or wired.

Inconclusive perhaps, but what can be deciphered from these results is that all three sounded very similar to each other, meaning Bluetooth doesn’t degrade sound quality as much as you think – and that most people wouldn’t actually know the difference.

For stern believers of wired audio, the result of this test is reaffirming: the luxury of a breathtaking home listening experience, often facilitated through a wired connection via a headphone amplifier, is objectively hard to beat.

But here’s where it gets interesting.

Recently, an alternative ground-breaking audio codec has surfaced. It allows much higher streaming capabilities, bridges the gap between wireless and wired audio quality, while eradicating the need for wires and supplementary devices to improve sound quality.

Is the love affair between audio enthusiasts and wires about to be derailed?

The game changer

Featured in Bowers & Wilkins PX,aptX HD enables 24-bit/48kHz resolution wireless sound that is indistinguishable from wired high resolution audio.

In a test comparing aptX HD audio to a pricey headphone amplifier, the new wireless technology was called a ‘revelation’ and ‘Bluetooth like you’ve never heard before’.

In addition to this discovery, Jon Bentley believes that the quality of the internal electronics of headphones are also to blame for the many years’ worth of poor perception of Bluetooth audio – not the wireless signal itself.

For it’s the combination of cutting edge components, such as the DSP chip and the digital-to-analogue converter, which elevate the quality of your music, not to mention the hours of research and fine tuning of the drivers – all of which we’ve built into PX.

As the Bowers & Wilkins founder John Bowers once said “The best speaker isn’t the one that adds the most, it’s the one that takes away the least.” and combining aptX HD audio and innovative engineering, this philosophy is embodied in PX.

Bluetooth vs Wired Audio Sound Quality (2024)

FAQs

Does wired sound better than Bluetooth? ›

In terms of sound quality, if your music is in MP3 format, you probably won't notice much difference between wireless and wired headphones, but if it is stored in ALAC/FLAC/WAV, sound differences may be more distinguishable. Generally speaking, most wired headphones provide better sound quality than wireless.

Does Bluetooth have better sound quality? ›

To enable this data to pass from one device to another, Bluetooth relies on SBC (low complexity subband coding) compression to 'fit' your music through the technology's imaginary 'thin pipes' – once again, resulting in less detail heard in your music. This doesn't sound great for true music lovers.

Does 3.5 mm sound better than Bluetooth? ›

Since Bluetooth requires no cables, you'll never need to worry about audio quality diminishing because of many uses. In short, aux cables are better at providing a superior sound quality when compared to Bluetooth. However, it's probably not very noticeable unless you are an audiophile yourself.

Does Bluetooth 5.0 improve audio quality? ›

A pair of wireless headphones that use Bluetooth 5.0 won't sound better than a pair that use Bluetooth 4.2 – or rather they might, but it won't be because of their Bluetooth version. But while the Bluetooth version doesn't affect sound quality, it does make a huge difference to the headphones' feature set.

Why do people still use wired headphones? ›

Headphones that you stick into a jack or charging port of your phone, computer and other devices typically cost less than comparable wireless models. Unlike wireless headphones, plug-in models don't have batteries that are destined to die. And they don't leave you stranded if you forget to charge them.

Why is wired audio better than wireless? ›

Wired headphones receive an analog signal, which can handle more data than Bluetooth®. Therefore, it offers better sound quality. Ubiquity: As long as there's a 3.5mm input, wired headphones can connect to any audio source, from your dad's Walkman to your brand-new laptop.

What is the highest quality audio over Bluetooth? ›

LDAC: Sony's LDAC offers the potential for the best possible Bluetooth sound quality. It runs at 330, 660, or 990 kbps; your phone may let you prioritize sound quality (990 kbps) or connection reliability (330 kbps). LDAC is available on many Android phones, but not in Apple devices.

Can you get CD-quality over Bluetooth? ›

Lossless Bluetooth is here.

While that might sound all doom and gloom for those of us who do the majority of listening through wireless headphones, the good news is that Qualcomm claims it has found a way to transmit CD-quality/lossless audio over Bluetooth… losslessly.

Can Bluetooth play lossless? ›

How does lossless audio work with Bluetooth? To experience lossless audio through Bluetooth, you will need a device that supports Qualcomm aptX Lossless. Your device must use Qualcomm's Snapdragon Sound technology to transmit true CD-quality audio to your Bluetooth Denon PerL Pro earbuds .

Why does USB sound better than Bluetooth? ›

USB doesn't limit the frequency response or signal-to-noise ratio of the music, so what you hear is exactly what your streaming music services or your stored music files are delivering. And besides being the best-sounding form of input, the USB input will often serve as a power source for your device too.

Do you lose audio quality with 3.5 mm jack? ›

The connector shouldn't affect the sound quality of a headset.

Does optical sound better than aux? ›

An optical connection will assure better audio performance and will accept Dolby Digital audio from an HDTV. However, there are times when TV apps may not transmit audio through the digital optical output on the TV. In cases such as these, it would be necessary to use the analog AUX connection.

Is Bluetooth 5.0 or 5.3 better? ›

Bluetooth 5.3 brings security improvements compared to Bluetooth 5.0. Bluetooth 5.3 introduces encryption key size control, allowing messages to be sent with a minimum amount of data to keep encryption costs low [3].

Does Bluetooth 5.2 sound better? ›

You will also be able to determine the direction a signal is coming from. Bluetooth 5.2, commonly referred to as Bluetooth LE Audio: It is a standard that was released at the beginning of 2020, and it enhances energy efficiency and sound quality in all connected devices used for audio tasks.

Does Bluetooth 5.3 support lossless audio? ›

AirPods Pro (2) use Bluetooth 5.3 wireless technology. It can't provide hi-res lossless audio. The 192 kHz lossless information is provided just to let the user know that the song is available in that format assuming a proper DAC is connected.

Is wired faster than Bluetooth? ›

The big question is, Can Bluetooth be fast enough to beat a wired connection? Well, the answer depends on the application, but in general, Bluetooth is not faster than a wired connection. In a work-from-home setting or office work, Bluetooth keyboards are fast enough to be undetectable by the user.

Is wired better than Bluetooth for gaming? ›

Technically, a wired audio connection can still offer better sound quality than a wireless connection since its signal can support a higher bandwidth with less interference.

Is wired better than wireless? ›

Wired connections usually offer faster, and more consistent internet speeds compared to wireless. This makes them ideal for activities that require high bandwidth, such as online gaming, streaming 4K videos, downloading large files or multiple video calls with family or work.

Are wired headphones louder than Bluetooth? ›

Wireless headphones will always have the volume range the manufacturer intended (safe listening volumes) while wired headphones will vary and can be overdriven if connected to a powerful source.

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