B-Fly ACCESSORIES FOR SOUND AND IMAGE OPTIMIZATION B-Fly 4Tube2 Decoupler 4er package for devices up to 50kg
B-Fly ACCESSORIES FOR SOUND AND IMAGE OPTIMIZATION B-Fly 4Tube2 Decoupler 4er package for devices up to 50kg B-Fly ACCESSORIES FOR SOUND AND IMAGE OPTIMIZATION B-Fly 4Tube2 Decoupler 4er package for devices up to 50kg B-Fly ACCESSORIES FOR SOUND AND IMAGE OPTIMIZATION B-Fly 4Tube2 Decoupler 4er package for devices up to 50kg

B-Fly 4Tube2 decoupler 4er package for devices up to 50kg


€ 99.00 € 122.00

Click here if you want to be informed as soon as this article is available.

Bly 4Tube-2 to 50 kg:

14mm height

All quotes Bfly Audio:

The absorbers are our reasonably priced successful model for devices and Speaker,

but also perfect for tube devices up to 50 kg!

The complex structure of the MASTER consists of 4 different materials, which according to our own MLA technology, according to a special arrangement distributed on 5 levels. This achieves a very broadband filtering of vibrations.


  • Under the feet or the speaker base.
    if necessary, remove spikes

  • Directly under the bottom plate of the hi-fi device.
    There are variants of the MASTER in a high design for this
    (see photo below)

Our new MKII version has received an additional HS-plugin made of extremely strong aluminum.

The physical effect is an improved horizontal stabilization in the area of ​​space sound. Lateral vibrations, mostly caused by the speakers, are eliminated even better. Especially in the case of turntables and CD players, ie mechanical components, we achieve a further increased peace in the sound.

The height of the absorber has no sonic effect.

The Sorbothane material, which is well-known in the HIGHEND segment, contributes significantly to improving the sound quality.

Several well-coordinated layers of high-quality absorber materials such as Sorbothane®, Cork, rubber, separated by a non-absorbent metal insert. Each absorber plane provides either different material or thickness for filtering different frequency spectra. This addition of filter levels results in an improved overall effect compared to single materials.

The music seems more relaxed, spatial and thus more natural.

MASTER absorber top


The complex structure of the MASTER series

The layers from top to bottom
- Cork with natural rubber
- Solid aluminum corpus as a separating layer
- Cork with natural rubber
- Sorbothane with plugin (Details)
- natural rubber

Master sketch gray

Structure of the MASTER (MPS)

a customer
You Tube logo

Bernhard V. from Sulzbach writes to us:
... Finally, then preamp and amplifier: here was my skepticism greatest, especially since the amplifier is massive and compact. But also here: respect for the audible effect. Even clearer, more detailed and more musical than before.
Overall, it was fun and I will even more often sit in front of the nicely tuned system and just enjoy it!
Stay on the ball and draw attention to yourself. The products are absolute class and I am so grateful to have come across bfly.

Technical background

The loudspeakers cause your system to vibrate. This negatively affects the signals in the tracks, components or cables. Therefore, good absorbers not only improve the sound of mechanical devices such as turntables and CD players, but also amplifiers and even power supplies

In the following we explain

1. Vibrations and their negative consequences: Microphony and mechanics

2. Vibration modes: Room sound and structure-borne sound

3. tuning measures based on your situation
shallow water waves 250px

1. Vibrations and their negative consequences


Microphone is the scientifically proven effect of disturbing the currents and signals caused by vibrations
be offset, negatively affected. This is a Law of physics.
You can learn more about it Wikipedia under "Microphone" nachlesen.
The result is an audibly more nervous and spatially unstable sound.
Affected are: turntables, CD players, power supplies and amplifiers of any kind

Mechanical components
Vibrations that hit mechanical devices like turntables and CD players degrade the sound,
because here the scanning capacity of the needle and also a CD laser is adversely affected.
Because the effect of microphony also works here, we have the best optimization potential for mechanical source devices.
We therefore recommend that you start with absorber tuning on your source devices.
Read more below - Why does a CD player sound "hard" and "unnatural"?

2. modes of vibration

In the following we show, between which types of disturbances we have to distinguish
room sound
By this one understands, the vibrations, which over the Air to hit the devices.
The cause of this is your loudspeakers whose sound waves disturb your devices.
To neglect is the often quoted kick. Who walks through the room during the attentive listening to music ....

structure-borne sound
By this one understands the vibrations, which over solid matter be transmitted.
In our case, it is the vibrations that act on the surface of the equipment, ie the rack and its bottoms.
The cause of this is again the loudspeakers, which redirect the sound waves across the floor to their rack.
Do you have unstable ground conditions such as laminate, floorboards or floating parquets (do not stick with screed),
you should decouple by means of absorbers instead of spikes.

3. Tuning measures related to your situation

What is the best way to do absorber tuning?

source devices
First, we recommend that you shut down your source devices such as CD players and turntables using absorbers.
Even if we do not have any structure-borne noise due to unstable ground conditions, we achieve this by reducing the noise in the room
an optimization of the scanning components and at the same time a reduction of the microphonic effect.
If you have laminate, floorboards or floating parquet flooring, we strongly advise against spikes.
Replace them with absorbers and thus reduce structure-borne noise.
Amplifier / tube amplifier
Here we achieve an even more stable and natural sound by reducing the body and the room sound.
We offer suitable absorbers for every weight class.
Especially for tube amplifiers and their weak points, we have the series 4TUBE developed.
Power Supplies
Since very high currents flow in power supplies, the effect of absorbers is often clearly audible here. Be sure to try.

Why does a CD player sound "hard" and "unnatural"?

For CD players, the common but unfortunately wrong opinion that 0-en and 1-en are unique and therefore not falsified. This is true for computers where protocols (TCP / IP etc.) ensure the correct transmission by re-reading in case of error. A CD player of conventional design but has only one read. A re-reading is not feasible, since it would lead to dropouts in music playback. The correction bit on the CD only allows the subsequent correction of certain types of errors and density. If a CD player is disturbed by the sound from its speakers, massive read errors are produced depending on the intensity of the vibrations and are only partially corrected by the correction bit. This often leads to an "unnatural" to "harsh" sound.

With our absorbers according to our own MLA technology, they eliminate the vibrations and thus the read errors by approx. 90%. The result is a natural sound that you would not expect from a CD.