SBC vs AAC: Codec Efficiency and Battery Life

What are SBC and AAC?

SBC and AAC are Bluetooth audio codecs, which are methods for compressing audio so it can travel wirelessly from your phone to your headphones. SBC, or Low Complexity Subband Coding, is the mandatory codec for Bluetooth Classic audio streaming, so nearly every Bluetooth headphone and phone supports it. AAC, or Advanced Audio Coding, is a codec commonly used on Apple devices, though many Android phones and headphones also support it.

When you see a listing that mentions SBC or AAC, it is telling you which codecs the headphone can use. The codec affects how the audio is encoded, which can influence both the sound quality and the power used during playback. However, the exact effect on battery life is not something a listing usually states, so the guides on this site compare only the details a maker or platform page provides.

Codec efficiency and battery life

A codec that is more efficient can send the same audio with less data, which may reduce the power the headphones use for wireless streaming. SBC is a simpler codec, while AAC is designed to be more efficient at higher bitrates. In general terms, a more efficient codec can help a headphone's battery last longer, but the difference is often small compared to other factors like the battery size and active noise cancelling.

The battery figures printed on a listing, such as the hours with ANC on or off, are the numbers to trust when comparing wireless headphones. The codec is one part of the wireless system, but the maker's stated battery life already accounts for typical use. For a long flight or a full workday, look for a listing with a higher printed battery figure rather than choosing a codec alone.

Audio quality and codecs

The codec can affect audio quality because it determines how much detail is kept during compression. AAC is often considered better at preserving detail at lower bitrates, which is why it is common on Apple devices. SBC, as the default codec, can still sound good, but its quality depends on the bitrate the phone and headphones negotiate.

The guides on this site do not rank how a codec sounds, because that would require listening. Instead, they explain what the codec name on a listing means and what to read on the maker's page. If a listing mentions Hi-Res audio or a codec like LDAC or aptX, that is a stated detail you can compare, but the sound quality itself is not something the catalogue can confirm.

Device compatibility

The codec your headphones use depends on both the headphones and the source device. For example, an iPhone typically uses AAC, while many Android phones default to SBC unless a higher-quality codec is selected. Some headphones support multiple codecs, and the listing may name them, such as SBC, AAC, or aptX.

When choosing wireless headphones, check the listing for the codecs it supports and compare that with your phone. If you use an Apple device, AAC support is useful. If you use an Android phone, SBC is always available, and you may also see aptX or LDAC on some listings. The guides for best wireless headphones and best wireless earbuds can help you shortlist models that match your device.

What to read on a listing

When you read a headphone listing, look for the codec names in the specifications or the title. A title that says 'SBC, AAC' is stating which codecs the headphone supports. If a listing does not mention a codec, it likely supports SBC at minimum, since that is the Bluetooth standard.

For battery life, read the printed hour figures, such as 'up to 24 hours with ANC on.' These figures are the maker's stated details, and the guides quote them exactly. The codec is not a number you can compare across listings, so focus on the battery figures and the fit, such as over-ear or earbuds, to match your listening situation.

Choosing for your situation

For a daily commute, the codec matters less than the battery life and noise cancelling. A long flight calls for a headphone with a high printed battery figure, such as 30 hours, and a comfortable over-ear fit. For a home desk, you might prefer a wired connection for simplicity, which avoids codecs entirely.

The guides on this site compare headphones on stated details, not on sound quality. Use the best long battery life headphones guide to find models with high printed battery figures, and the best noise cancelling headphones guide for commute-friendly options. The codec is one detail among many, and the right choice depends on your phone and your listening habits.

What to pick for your situation

Questions

Does SBC or AAC use more battery?

AAC is generally more efficient than SBC at higher bitrates, but the exact battery impact is not stated on listings. The printed battery figures on a headphone listing are the reliable numbers to compare.

Which codec sounds better, SBC or AAC?

AAC is often considered better at preserving detail, but sound quality is not something the guides can compare without listening. The codec is one factor; the headphone's design and driver also matter.

Do all Bluetooth headphones support SBC?

SBC is the mandatory codec for Bluetooth Classic audio, so nearly all Bluetooth headphones support it. AAC support is common but not universal, especially on Android-focused models.

Can I change the codec on my headphones?

The codec is negotiated between the phone and the headphones, and some phones let you select a preferred codec in the Bluetooth settings. The headphones must support the codec for it to be used.

Is AAC better for battery life than SBC?

AAC's efficiency can help battery life, but the difference is usually small. The headphone's battery size and features like ANC have a larger effect on runtime.