Contents
- Sound and Speaker Technology
- Enclosures and Speaker Design
- Connections, Streaming, and Connectivity
- Home Theater and Audio Formats
- Radio and Reception
- Battery, Power Supply, and Energy
- Protection Ratings and Durability
Sound and Speaker Technology
These details help assess how a speaker sounds and what applications it is suitable for. Among other things, they describe which frequencies can be reproduced, how sound is distributed among the different speaker drivers, and how speakers work together with an amplifier.
Frequency Range
The frequency range describes which low and high tones a speaker can reproduce.
What does the frequency range say about the sound?
It shows which low and high tones a speaker can reproduce.
Does a wider frequency range automatically mean better sound?
No. Speaker design, tuning, and room acoustics also influence the sound.
How important is the lower cutoff frequency?
The lower the value, the deeper a speaker can reproduce bass.
Do I need a subwoofer?
A subwoofer can be useful for particularly deep and powerful bass.
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Sensitivity (dB)
Sensitivity describes how loudly a speaker plays at the same amplifier power.
What does “87 dB (2.83 V / 1 m)” mean?
The speaker reaches a sound pressure level of 87 dB at an input voltage of 2.83 volts and a distance of 1 meter. This specification is used to compare different speakers.
Is 87 dB good for a speaker?
87 dB is a typical value for many hi-fi speakers. Whether the achievable volume is sufficient also depends on amplifier power, listening distance, and room size.
Does more dB mean better sound?
No. Sensitivity describes how efficiently a speaker converts electrical power into sound. Sound quality depends on many other factors.
Maximum Sound Pressure Level (dB)
The maximum sound pressure level indicates how loudly a speaker can play.
What does “Maximum Sound Pressure Level (dB)” mean?
It describes the highest volume a speaker can reach. The value is given in decibels (dB).
Is a higher value better?
A higher maximum sound pressure level allows for higher volume. This can be beneficial in large rooms or at high levels. However, the value alone is not decisive for sound quality.
Is 100 dB a lot for a speaker?
A maximum sound pressure level of 100 dB already allows for very high volume and is sufficient for many applications in the home.
Can I directly compare the dB values of different speakers?
Not always. With passive speakers, the achievable sound pressure level also depends on the amplifier used. For subwoofers, the value refers to the bass range and is therefore only comparable to other speakers to a limited extent.
Impedance
Impedance describes the electrical resistance of a speaker and is specified in ohms (Ω).
What does “4 ohms” mean?
It describes the electrical load that a speaker presents to the amplifier.
What does “4 to 8 ohms” mean?
A speaker’s electrical impedance changes depending on the frequency. The specification “4 to 8 ohms” therefore describes a typical operating range rather than a fixed resistance value.
Are 4-ohm speakers compatible with my amplifier?
In most cases, yes. To be safe, check your amplifier’s technical specifications or owner’s manual. It will state which speaker impedances it supports.
Is 4 ohms better than 8 ohms?
No. Impedance is not a quality characteristic and does not indicate sound quality or volume.
Do I need to consider impedance when choosing an amplifier?
Yes. Speakers and amplifiers should be compatible with each other. You can find the supported impedance in the amplifier’s technical specifications.
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Continuous Power Handling (RMS)
Continuous power handling describes the power a speaker can process continuously.
What does “Continuous Power Handling (RMS)” mean?
It indicates the amplifier power a speaker can process over an extended period without being damaged.
Do more watts mean more volume?
Not necessarily. The wattage primarily describes power handling. Other factors, such as speaker sensitivity, are also important for the achievable volume.
That depends on room size, listening distance, and the desired volume. Most living rooms do not require particularly high wattage.
Can I directly compare the wattage of different speakers?
Only to a limited extent. Wattage describes a speaker’s power handling, not its maximum volume or sound quality.
Is continuous power handling (RMS) important when choosing an amplifier?
Continuous power handling (RMS) is one point of reference when choosing an amplifier. Impedance, sensitivity, and the desired volume should also be considered.
Learn more
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- Home Theater: Which AV Receiver/Amplifier Is Compatible with Which Teufel Home Theater System?
Peak Power Handling
What does “Peak Power Handling” mean?
It indicates the short-term power peaks a speaker can process.
Is higher peak power handling better?
Higher peak power handling can be beneficial if strong volume peaks occur frequently, for example with movies or dynamic music.
Is peak power handling more important than continuous power handling?
No. Continuous power handling is generally more meaningful for normal operation. Both values complement each other.
Can I directly compare the peak power handling of different speakers?
Only to a limited extent. Peak power handling describes short-term power peaks and, on its own, says little about volume or sound quality.
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Enclosures and Speaker Design
These details describe a speaker’s construction. They can affect sound, bass reproduction, placement, and everyday use.
Bass Reflex
What does bass reflex mean?
An opening in the enclosure supports the reproduction of low frequencies and is part of the speaker’s tuning.
Does a bass-reflex speaker have more bass?
Often, yes. Compared with similarly sized sealed speakers, it can reproduce more deep bass.
Do I need to consider anything when positioning it?
For speakers with a rear-facing bass-reflex port, leaving some space between the speaker and the wall can improve sound quality.
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Materials & Enclosure Design
These details describe the materials used and the structural design of a speaker. They can affect stability, resonances, and the speaker’s tuning.
Why are enclosures made of MDF?
MDF is a stable wood-based material that is often used in speaker construction and can help reduce enclosure vibrations.
What does Kevlar mean in speakers?
Kevlar is a lightweight, strong diaphragm material that is often used for speaker drivers.
Why are different diaphragm materials used?
Diaphragm materials differ, for example, in terms of weight, strength, and damping, and are selected according to the speaker concept.
Do the materials used affect the sound?
Yes. The materials used are part of the speaker’s construction and can influence its characteristics.
Does a larger enclosure have more bass?
Larger enclosures can often support the reproduction of lower frequencies. However, the speaker’s tuning is decisive.
Is one particular material fundamentally better?
No. Each material has different characteristics. What matters is how it is used in the respective speaker concept.
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Connections, Streaming, and Connectivity
These details show which devices can be connected to a product and which signal types are supported. They help determine whether speakers, soundbars, TVs, amplifiers, or source devices are compatible with one another.
Bluetooth
Bluetooth enables wireless transmission of audio signals between compatible devices.
What does Bluetooth mean for speakers?
Bluetooth allows music, podcasts, or other audio signals to be transmitted wirelessly from a smartphone, tablet, or computer to the speaker.
Which Bluetooth version do I need?
In general, different Bluetooth versions work together. However, newer versions can offer advantages in range, stability, and energy consumption.
Does Bluetooth affect sound quality?
Bluetooth compresses audio data for transmission. Modern Bluetooth codecs such as AAC or aptX provide high sound quality that is more than sufficient for most applications.
How far does a Bluetooth connection reach?
The range depends, among other things, on the Bluetooth version, the devices, and possible obstacles. Indoors, ranges of several meters are common.
Can I connect multiple devices at the same time?
That depends on the product. You can find information about this in the technical specifications or owner’s manual.
What are Bluetooth codecs such as aptX or AAC?
Bluetooth codecs determine how audio data is transmitted. Depending on the supported codec, sound quality, latency, and energy consumption may differ.
Wi-Fi / Network / Streaming
Wi-Fi connects a device to the home network and enables streaming services, multi-room functions, and other network features.
What is the difference between Wi-Fi and Bluetooth?
Bluetooth connects devices directly to each other. Wi-Fi uses the home network and enables additional functions such as streaming services, multi-room, or app control.
Do I need an internet connection?
For many streaming services, yes. Some functions can also be used without the internet.
Is Wi-Fi better than Bluetooth?
That depends on the intended use. Wi-Fi often offers additional functions, while Bluetooth is particularly easy to set up.
What advantages does Wi-Fi streaming offer?
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HDMI (ARC/eARC)
HDMI enables audio and video signals to be transmitted over a single cable.
What does HDMI ARC mean?
HDMI ARC (Audio Return Channel) enables sound to be transmitted from the TV to the audio system over the same HDMI cable. This eliminates the need for an additional audio cable.
What is the difference between ARC and eARC?
ARC (Audio Return Channel) and eARC (Enhanced Audio Return Channel) transmit sound from the TV to a soundbar or AV receiver via an HDMI cable. eARC offers significantly more bandwidth and therefore supports high-resolution audio formats such as Dolby TrueHD, DTS-HD Master Audio, and Dolby Atmos at full quality. ARC is generally sufficient for regular TV and most streaming services. However, anyone who values the best possible home theater sound benefits from eARC.
Do I need a special HDMI cable?
A High-Speed HDMI cable is usually sufficient for ARC. You can find the applicable cable requirements in the technical specifications or owner’s manual for your devices.
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Optical Input (TOSLINK)
What is an optical input?
An optical input transmits digital audio signals using light pulses.
When is an optical input used?
It is often used to connect TVs, game consoles, or CD players to soundbars, amplifiers, or AV receivers.
Is HDMI better than an optical input?
Depending on the device, HDMI offers additional options such as ARC or eARC for audio transmission, as well as CEC for controlling compatible devices with one remote. HDMI can also transmit more and higher-quality audio formats in some cases. However, an optical input (TOSLINK) remains a proven and reliable connection for digital audio signals and is completely sufficient for many applications.
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Analog Audio Inputs
Analog audio inputs enable audio signals to be transmitted as electrical signals, for example through RCA or 3.5 mm connections.
What are analog audio inputs?
Analog audio inputs are used to connect devices such as CD players, TVs, or smartphones. Turntables often require a phono preamp before they can be connected to an analog audio input.
What is the difference between RCA and 3.5 mm?
Both connections can transmit analog audio signals. RCA is often used with hi-fi equipment, while 3.5 mm connections are primarily used with mobile devices, computers, and headphones.
Does an analog connection provide lower sound quality than a digital connection?
Not necessarily. Sound quality depends on the entire audio system and the components used. However, digital connections are less susceptible to interference during signal transmission.
Can I connect my smartphone or laptop via an analog input?
Yes. Many devices can be connected to an analog audio input via a 3.5 mm output or a suitable adapter.
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Home Theater and Audio Formats
Stereo, 2.1, 5.1, 7.1, etc.
These details describe how many speakers and subwoofers are used to reproduce an audio signal.
What does stereo mean?
Stereo reproduces sound through two separate audio channels. This creates a spatial sound image between the left and right speakers.
What do 2.1, 5.1, 5.1.2, 7.1, 7.1.2, or 7.1.4, etc. mean?
These details describe how many speakers, subwoofers, and, where applicable, height speakers are used to reproduce an audio signal. The first number indicates the number of speakers. The second number indicates the number of additional subwoofers used to reproduce low frequencies and powerful bass. The third number describes additional height speakers. For example, a 5.1.2 system has five speakers, one subwoofer, and two height speakers. A 2.1 system consists of two speakers and one subwoofer.
Are 7.1 or 7.1.4 better than 5.1 or 5.1.2?
Not necessarily. The right speaker configuration depends on room size, placement, and use. Additional speakers and height channels can improve spatial reproduction, but they require sufficient space and suitable content
Do I need multiple speakers for surround sound?
True multichannel surround sound uses multiple speakers. Some soundbars can also create spatial sound effects virtually.
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Surround Sound
What is surround sound?
Surround sound is multichannel audio reproduction in which sounds are played from different directions.
Is surround sound only suitable for movies?
No. Games and some music recordings can also benefit from spatial sound reproduction.
Do I need a special audio source for surround sound?
True surround sound requires the source material to contain corresponding multichannel audio signals.
What is the difference between true and virtual surround sound?
True surround sound uses multiple speakers in the room. Virtual surround sound creates spatial effects through signal processing and can sometimes be implemented with a soundbar.
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Dolby Atmos & DTS:X
Dolby Atmos and DTS:X are audio formats for three-dimensional spatial sound. Compared with conventional surround sound, they can also reproduce height information, allowing sounds to be perceived above the listener.
What are Dolby Atmos and DTS:X?
Dolby Atmos and DTS:X are audio formats for three-dimensional spatial sound. They enable particularly immersive reproduction of movies, shows, games, and other audio content.
What is the difference between Dolby Atmos and DTS:X?
Both formats pursue the same goal: creating the most realistic spatial sound possible. Which technology is used depends on the supported devices and available content.
Do I need Dolby Atmos or DTS:X?
Not necessarily. With supported content, both formats can provide an even more immersive listening experience.
Do Dolby Atmos and DTS:X work with every device?
No. The playback device and audio source must support the respective audio format.
Do I need special content for Dolby Atmos or DTS:X?
Yes. The movie, show, game, or streaming service must support the respective audio format.
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Radio and Reception
DAB+
DAB+ (Digital Audio Broadcasting Plus) is the digital standard for radio reception over the air. Compared with FM, DAB+ enables reception of many radio stations in digital quality without requiring an internet connection.
What is DAB+?
DAB+ is a digital transmission standard for radio and is considered the successor to traditional FM radio. Radio stations are broadcast digitally over the air and received with a DAB+-enabled device.
Do I need the internet for DAB+?
No. DAB+ receives radio stations via digital radio signals and works without Wi-Fi or an internet connection.
Is DAB+ better than FM?
DAB+ offers digital signal transmission and often a greater selection of stations. However, actual reception quality depends on the location and regional network coverage.
Why can’t I find any DAB+ stations?
Possible causes include an unfavorable antenna position, a missing station scan, or limited DAB+ coverage at your location.
Can I add DAB+ to an existing system?
Yes. Many hi-fi systems and radios can be expanded with an external DAB+ receiver if a free audio input is available.
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Internet Radio
What is internet radio?
Internet radio transmits radio stations as audio streams over the internet. This provides a much greater selection of stations than traditional radio reception.
Do I need Wi-Fi for internet radio?
Yes. Internet radio requires an active internet connection, for example via Wi-Fi or a network cable.
What advantages does internet radio offer?
Internet radio provides access to thousands of local, national, and international radio stations, as well as numerous music and specialty stations.
Why does playback sometimes stop?
The cause is often an unstable or slow internet connection. Network problems can also affect playback.
Can I listen to local radio stations with internet radio?
Yes. Many local and national radio stations also offer their programs as internet streams.
FM
What does FM mean?
FM is an analog transmission standard for radio stations. Reception takes place via an antenna.
What is RDS?
RDS (Radio Data System) adds additional information to FM reception. Depending on the radio station and device, station names or program information may be displayed, for example.
Do I need the internet for FM radio?
No. FM radio is received over the air and does not require an internet connection.
Why is my radio reception noisy?
An unfavorable antenna position, a great distance from the transmitter, or structural conditions can impair reception quality.
Can I continue to use FM radio?
Yes. FM is still available. At the same time, DAB+ is continuously being expanded as a digital radio standard.
How can I improve radio reception?
Simply changing the position of the antenna or device often helps. Running another station scan can also improve reception quality.
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Battery, Power Supply, and Energy
Battery, Battery Life & Charging
These details describe how long a device can be used on battery power, how the battery is charged, and which options are available for operation using battery or AC power.
What does battery life mean?
Battery life describes how long a device can be used on a single battery charge.
Why doesn’t battery life always match the specified value?
Actual battery life depends on factors such as volume, signal source, ambient temperature, and usage habits. The specified values are therefore intended as a guide.
Does high volume use more battery power?
Yes. High volume and intensive bass reproduction generally increase energy consumption and can shorten battery life.
How is the battery charged?
Depending on the product, charging takes place via USB-C or a power adapter. You can find the supported charging methods in the technical specifications for the respective product.
What does fast charging mean?
A fast-charging function allows the battery to be charged in less time than with conventional charging methods.
What does USB-C Power Delivery (PD) mean?
USB-C Power Delivery is a charging standard that enables higher charging power via USB-C. This allows compatible devices to be charged faster and more efficiently.
Can I use any USB-C charger?
For many current devices, yes. However, for optimal charging performance, we recommend using a charger with sufficient power.
Why isn’t a power adapter always included?
Some products are delivered without a power adapter because existing USB-C chargers can be used. This reduces packaging materials and unnecessary electronics.
What does battery and AC operation mean?
The device can be operated both on the go using its built-in battery and while stationary using an external power supply.
Does the battery charge while operating on AC power?
Many devices automatically charge the battery as long as a power supply is connected.
Can I use the device while it is charging?
Many devices support simultaneous use while charging. Whether this is possible depends on the product.
Is AC operation suitable for continuous use?
Yes. Devices with a power connection can generally be operated continuously on AC power.
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Energy Saving & Standby
These functions help reduce power consumption during operation and when the device is not in use.
What does auto power-off mean?
The device automatically switches off after a certain period without playback or operation to save energy.
What does standby mean?
In standby mode, the device remains ready for use while consuming very little energy.
Is there an automatic standby function?
Some products automatically switch to standby mode after a certain period without a signal or operation. Availability depends on the model.
Power Bank Function
Devices with a power bank function can use part of their battery capacity to provide power to other devices while on the go.
What is a power bank function?
Devices with a power bank function can charge smartphones or other mobile devices via a USB port, for example.
Does the power bank function use battery power?
Yes. The required energy is drawn from the device’s battery and accordingly reduces the remaining battery life.
When is a power bank function useful?
It is especially convenient on the go when no outlet is available and mobile devices need to be charged.
Protection Ratings and Durability
IP Protection Ratings (IPX4, IPX5, IPX7, IP67)
What does an IP protection rating mean?
An IP protection rating describes how well a device is protected against the ingress of dust and water. The first digit represents protection against solid foreign objects such as dust, while the second digit represents protection against water. If the first digit is missing and replaced by an “X” (e.g., IPX7), dust protection has not been tested or specified.
| Protection Rating | Meaning | Typical Applications |
|---|---|---|
| IPX4 | Protection against splashing water from all directions | Kitchen, light rain showers |
| IPX5 | Protection against water jets, such as rain or streams of water | Balcony, patio, garden, camping |
| IPX7 | Protection against temporary immersion in water | Beach, pool, lake |
| IP67 | Complete protection against dust and protection against temporary immersion in water | Beach, camping, outdoors, dusty environments |
What is the difference between splashproof, water-resistant, and waterproof?
Splashproof devices can withstand splashes of water or light rain. Water-resistant or waterproof devices offer a higher level of protection. The respective IP protection rating indicates how resistant a product actually is.
That depends on the protection rating. Devices with IPX4 are protected against splashing water and are suitable for light rain showers. Models with IPX5 can also withstand heavier rain or water jets. Speakers with IPX7 or IP67 may even be briefly submerged in water, provided the conditions of the respective protection rating are met.
Look for a sufficiently high protection rating. For use in the bathroom, a splashproof device rated IPX4 or higher is often sufficient. If the speaker is used in the immediate vicinity of a shower, bathtub, or sink, it is better to choose a speaker with an IPX5, IPX7, or IP67 protection rating.
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Outdoor Suitability & Durability
What does outdoor-ready mean?
Outdoor-ready products are designed for use outside the home. They often feature a battery, a sturdy construction, and protection against environmental influences such as rain or dust.
What does a sturdy enclosure mean?
A sturdy enclosure better protects the internal technology against everyday stresses, such as during transportation or outdoor use.
Is a sturdy enclosure automatically impact-resistant?
No. A sturdy enclosure may be more resistant to impacts and vibrations, but it does not replace special certification for drop or impact resistance.
Are outdoor speakers suitable for camping, the beach, or the garden?
Yes. Many outdoor speakers were specifically developed for mobile use and are suitable for activities such as camping, garden parties, excursions, or use at the beach. The exact possible applications depend on the product’s specific features and protection ratings.
Do I need to close connections and covers?
Yes. For many water- or dust-protected devices, the protection rating only applies when all covers and connections are properly closed.
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