Last updated: August 6, 2021

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Welcome to our big Bluetooth transmitter test 2021. Here we present all Bluetooth transmitters that we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the internet.

We would like to make your purchase decision easier and help you find the best Bluetooth transmitter for you.

You will also find answers to frequently asked questions in our guide. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy a Bluetooth transmitter.




Summary

  • A Bluetooth transmitter is an interface extension for a non-Bluetooth audio device. It makes it possible to pair older devices such as a stereo system or a TV with Bluetooth-enabled devices such as headphones or speakers.
  • Bluetooth transmitters are responsible for sending data from one audio source to another audio device. Bluetooth receivers, on the other hand, receive audio signals. Bluetooth transmitters and receivers can often be purchased as dual adapters (2 in 1).
  • The modern audio codec aptX and the Bluetooth version determine sound quality, range and the avoidance of a time delay in the transmission of audio signals.

The Best Bluetooth Transmitter: Our Choices

Guide: Questions you should ask yourself before buying a Bluetooth transmitter

What is a Bluetooth transmitter used for?

A Bluetooth transmitter allows you to upgrade older sound devices such as your Ipod or your old stereo with the latest Bluetooth technology. The transmitter can transfer audio signals between two devices.

The Bluetooth transmitter allows you to pair your old stereo with your modern Bluetooth headphones or mobile speaker. Tedious wiring across several rooms is a thing of the past. (Image source: unsplash.com / Gabriel)

With the help of the Bluetooth transmitter, your TV, for example, can also send the audio sound to your headphones via Bluetooth. In the future, you can watch TV while your partner works undisturbed in the living room.

How does a Bluetooth transmitter work?

  1. The Bluetooth transmitter is connected to the audio source either with a 2.5 mm or 3.5 mm jack plug (e.g. AUX) or with a digital optical connection (e.g. Toslink) using an audio cable.
  2. The input enables data transmission. The Bluetooth transmitter finally encodes the data. In the process, the data size is reduced so that the data can be transmitted via Bluetooth.
  3. These are finally transmitted loss-free to the receiver device and decoded in turn. After the conversion into an analogue signal, the end device can play the audio signal.

You can find out all the important facts about how Bluetooth works in general in the following video.

What do I need to consider when buying a Bluetooth transmitter?

Before buying, you should ask yourself what you need the Bluetooth transmitter for. It is important to know which device the Bluetooth transmitter will be used for. For example, if it will be used in the living room for the TV or the stereo system, a stationary application with a power supply unit is advantageous.

Furthermore, it is possible to buy a dual adapter. This is both a Bluetooth transmitter and a Bluetooth receiver. The application can send as well as receive audio signals and thus offers a more comprehensive function.

What brands of Bluetooth transmitters are available?

Bluetooth transmitters are available in a variety of different brands. These include well-known brands such as Philips, Sony or Hama.

You can find more brands and manufacturers of Bluetooth transmitters in the following list:

  • Aukey
  • Elegiant
  • Logitech
  • Sonos
  • Sennheiser
  • TaoTronics
  • Ugreen
  • Xiaomi
  • Yetor

Bluetooth transmitters are for everyday use and thus represent a mass product on the market. This is the reason for the countless manufacturers and brands.

What does a Bluetooth transmitter cost?

A Bluetooth transmitter is often the cheaper alternative to a device with integrated Bluetooth function. You can get Bluetooth transmitters for as little as 15 euros. The price range is between 15 and 200 euros. The average price is around 30 euros.

Expensive does not mean good quality. Look for comparisons and tests of products to find the Bluetooth transmitter with the best price-performance ratio.

What alternatives are there?

To clarify in advance whether a Bluetooth transmitter is right for your desired application, we would like to show you below which alternatives there are for the Bluetooth transmitter.

Audio cable

For short distances between the devices, the conventional audio cable is still recommended. Problems such as noise usually do not occur here, so that good sound quality can be guaranteed. However, if you want to put an end to cable clutter, the audio cable is probably not a suitable alternative for you.

Audio devices with Bluetooth function

Stereo systems, televisions, notebooks, smartphones, etc. on the market today already have the Bluetooth function integrated into the device. However, devices with integrated Bluetooth function are usually more expensive and who wants to replace their classic stereo system with record player, which has already served them well for years, with a modern system?

WLAN adapter

The WLAN adapter is a good alternative to the Bluetooth transmitter. It allows higher data volumes to be sent without loss. The range of a WLAN adapter is also much greater than that of the Bluetooth transmitter. The big advantage for the Bluetooth transmitter is that it can be used anytime and anywhere and does not require a WLAN connection.

Decision: What types of Bluetooth transmitters are there and which one is right for you?

The different types of Bluetooth transmitters can be categorised according to their usage scenarios. Essentially, a distinction is made between the following three types:

  • Bluetooth Transmitter for TV or PC
  • Bluetooth Transmitter for Stereo
  • Bluetooth transmitter for MP3 player

The structure of the various Bluetooth transmitters and their functions do not differ. However, depending on the area of application, the focus should be on certain characteristics of the Bluetooth transmitter.

What distinguishes a Bluetooth transmitter for the TV or PC and what are its important features?

With a Bluetooth transmitter for the TV or PC, the focus is on the sound quality and the avoidance of interfering noises. It is important that there is no time delay in the transmission of the audio signal so that lip synchronicity can be guaranteed.

To meet these requirements, the Bluetooth transmitter should be equipped with the latest Bluetooth version and support the modern audio codec aptX.

Advantages
  • Latest Bluetooth version
  • support of the modern audio codec atpX

The range, on the other hand, does not play an important role for this application, as you are usually only a few metres away from the TV or PC. Most televisions or computers have an audio connection for headphones, which is why the analogue connection is sufficient for the transmitter.

What distinguishes a Bluetooth transmitter for a stereo system and what are its important features?

The Bluetooth transmitter for a stereo system usually has a long range. For example, if you pair your headphones with the Bluetooth transmitter, a connection should be guaranteed over several metres so that you can also listen to the music in other rooms.

It is also advantageous if the Bluetooth transmitter can be paired with several devices so that, for example, audio signals can be sent to several speakers in different locations. In most cases, an AUX connection is sufficient.

Advantages
  • Long range
  • Multipairing
  • RCA cinch connection

Support of modern audio codecs is less important in this application, as a time delay is usually not noticeable. An integrated rechargeable battery or batteries are not necessary, as the power supply can be ensured by the USB connection to the stereo system.

What distinguishes a Bluetooth transmitter for the MP3 player and what are its important features?

Mobility is the most important feature of a Bluetooth transmitter for MP3 players. The transmitter should have an integrated rechargeable battery or batteries and in the best case also have a USB connection.

A long battery life is an advantage if you often use your MP3 player on the road. In addition, the Bluetooth transmitter should guarantee a long range so that the MP3 player can also be used at home with Bluetooth-enabled headphones.

Advantages
  • Integrated rechargeable battery or batteries
  • Long battery life
  • Long range

Again, the audio codec aptX does not necessarily have to be built into the transmitter, as the time delay does not have a disruptive effect on the audio sound. A conventional audio connection such as AUX is sufficient for this application.

Buying criteria: Use these factors to compare and evaluate Bluetooth transmitters

In the following, we will show you which aspects you can use to decide between the many possible Bluetooth transmitters.

The criteria you can use to compare Bluetooth transmitters include:

  • Connections
  • Maximum range
  • Bluetooth version
  • Support of modern audio codecs
  • Multipairing
  • Battery life

In the following paragraphs, we will explain what is important for each criterion.

Connections

Most Bluetooth transmitters have an analogue audio connection such as the 3.5 mm AUX jack or the RCA cinch plug. The aux input corresponds to the standard of today's speakers and headphones.

The RCA cinch plug is often found on older players. When buying a Bluetooth transmitter for your old stereo system, be sure to check the available connections. (Image source: unsplash.com / Vincent Botta)

In addition to analogue audio connections, many Bluetooth transmitters also offer a digital-optical connection such as the Toslink jack (S/PDIF jack) or a coaxial input.

Maximum range

The range of a Bluetooth transmitter is a decisive quality criterion. High-quality Bluetooth transmitters have a range of up to 50 metres and more.

There are three different classes of Bluetooth transmitters, which differ in their range and transmission power. A longer range also means more power consumption.

The maximum range is also reflected in the prices of the transmitters. The required range depends on the desired application. For example, if you want to connect the Bluetooth transmitter to your headphones, a range of more than 15 metres is appropriate.

Class Transmitting power Range
Class 1 100 mW up to 100 m
Class 2 2.5 mW up to 10 m
Class 3 1 mW up to 1 m

Bluetooth version

The version of the Bluetooth protocol determines sound quality, range and connection continuity. Bluetooth 5.0 is the latest version.

Version 4.0 already offers a much greater range than previous versions, can send larger amounts of data in a shorter time and is also less susceptible to interference. Older versions are therefore not recommended.

Support of modern audio codecs

Modern audio codecs include aptx Low Latency or aptx HD. They ensure that the audio signals are transmitted to the receiving device with a high-quality sound and without delay.

The bandwidth determines the sound quality of the audio signals. A bandwidth of 320 kBit/s or more is considered high quality.

It is important that the playback devices also support the aptX codec. IPhones, for example, only support the AAC codec with a lower bandwidth, whereas smartphones with Android 8.0 are equipped with the aptX codec.

Codec Bandwidth
AAC 250 kBit/s
SBC 345 kBit/s
aptX 354 kBit/s
aptX HD 576 kBit/s

Multipairing

If you want to connect the Bluetooth transmitter to several speakers at the same time, for example, be sure to check before buying whether the Bluetooth transmitter allows simultaneous connection to several devices.

In most cases, the Bluetooth transmitter can only be connected to a maximum of two devices. Low-priced transmitters usually do not have this function.

Battery life

For mobile use of the Bluetooth transmitter, the battery life plays a decisive role. High-quality Bluetooth transmitters have a battery life of up to eight hours. The charging time can take several hours.

In most cases, a USB interface is integrated into the Bluetooth transmitter, so that it can be conveniently charged on the go using a USB cable and a power bank.

Most Bluetooth transmitters can also be used during the charging time.

Facts worth knowing about Bluetooth transmitters

How do I charge a Bluetooth transmitter?

Most Bluetooth transmitters have a power bank or a USB port that connects to the audio source. In these cases, you do not need to charge the Bluetooth transmitter.

If, on the other hand, the Bluetooth transmitter has an integrated rechargeable battery or batteries, charging is necessary. Charging the battery is usually possible with a micro-USB cable or a power supply cable. Batteries can be replaced.

How do I connect a Bluetooth transmitter to the TV?

To connect two devices such as the TV and Bluetooth-enabled headphones, the Bluetooth transmitter must first be connected to the TV using a jack cable at the AUX input. In addition, the power supply can be ensured by a USB cable or a power supply cable.

After the Bluetooth transmitter has been switched on and the Bluetooth function has been activated on the headphones, the connection is usually automatic. The headphones now play back the audio signal from the television.

How do I avoid noise and improve the sound quality?

There are many causes of background noise. Below are our four essential tips for avoiding noise.

  1. First and foremost, you should make sure that other Bluetooth-enabled devices in the room or in the near vicinity are switched off.
  2. You should always place the Bluetooth transmitter as freely as possible in the room so that no obstacles can interfere with the transmission of the audio signal. Reinforced concrete and metal objects, for example, dampen the radio waves.
  3. In addition, you should reduce the distance to the Bluetooth transmitter if noise and interference occur. The permissible distance depends on the characteristics of your Bluetooth transmitter.
  4. When adjusting the volume, make sure that the volume on the audio source is always set as high as possible. The volume should only be adjusted on the playback device to guarantee good sound quality.

Are there Bluetooth transmitters for the car?

A Bluetooth transmitter for the car is called a Bluetooth FM transmitter. These are small FM transmitters with a short transmission range. The Bluetooth FM transmitters often have a plug for the cigarette lighter to ensure the power supply.

The transmitter searches for a free radio frequency that allows music from your smartphone or tablet to be played on the car radio. (Image source: unsplash.com / Humberto Arellano)

Image source: 123rf.com / Allenden I.

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