What is the DREi All Inside module?


It is a 100% analog module designed to combat intermodulation and the physical limitations of the speakers and other factors that should not be in a music signal or amplified. Internally is composed of 2 x DREi tech processor and 6 buffers operating in parallel. The goal is to work with as pure a signal as possible and neutralize what is harmful.


What does DREi mean?


Dynamic Reduction  of Electronic Interaction.


What does it do and what do I gain by adding one to my systems?


You will notice some major and obvious improvements:

· Increases in the overall performance of the speakers and filters and optimization of the power amplification, offering greater volume for less energy.

· Crossover is more accurate when working with pure signals.

· The relationship between music  and "other things" increases dramatically, resulting in cleaner sound details.

· It particularly stresses the bass sounds making them clearer, more consistent and powerful.

· Each instrument sounds more individual. The instruments and voices sound more “present” and the different sound levels can be heard better.

· and much more. We invite you to discover all its facets.


How does DREi do it?


                  DREi achieves this using several techniques together, some of them are:

· It attenuates the intermodulation produced by the frequencies and the  electronics.

· It reinterprets waveforms which are difficult to play through the speakers, thus increasing their performance.

· It reinterprets distortion caused by saturation  and recovers lost “energy”.

· Controls the power in the lower frequencies to give a strong bass response and prevent it from subtracting “energy” from other frequencies.


Does DREi function well in all audio systems?


Yes, its effect is the same. No matter the quality or level, there is always improvement. The greater the complexity of the equipment or music, much better in the case of multitrack systems. For modest systems it is a great investment.


In what situations is it more advisable to use it?


No doubt in live concerts, there are many elements and tracks that add problems to the audio signals. It is also being used with remarkable results in recording studios, for monitoring and mastering, in discos and night clubs, sound systems, broadcasting, etc.. In fact any place where people work with audio signals. We especially highly recommended for High End systems.


Are there digital processes in this device?


No, the audio signal never leaves the analog domain.


Why does the volume go up when DREi is connected?


In fact the volume does not increase much, although it seems too. It improves the performance of the amplifier and speakers. There seems to be a higher sound level but in reality there is a higher ratio of pure sound in the amplified signal and our ears hear all the sounds more clearly, hence creating an illusion of greater volume at the same input levels.


To check this you can measure the decibels with pink noise and sound level metres in hand, (with 1K37Ω R_SCENE), and check that the difference is only + - 1 dB. The way that the total energy is distributed makes the electronic measurements inaccurate, even more so if single frequencies are being measured. Note that each system is different and the effect can differ from one to another.


Another simple test you can do is to turn up the volume with DREi on “bypass” mode until you hear distortion  coming from amplification saturation. Now turn the DREi on. You will note now that it sounds louder but without distortion (it should distort even more due to the apparent volume increase and does not). This is obvious evidence of the increased performance discussed above. Try to raise the volume even higher, you can probably get more audio level before saturation is reached and without forcing the speakers.


I already have a good sound, is the improvement great enough to make it worth buying?


Without a doubt. This is one of those rare occasions when a new device with new technology is clearly, instantly and undoubtably noticeable. Not small or subtle, doubtful changes for better or worse. It is very difficult to define but the fact that a large number of artists and engineers have already built it into their systems is strong evidence our claims are justified. No one inserts a new device unless it is really worth it. The audio professional is always working to improve each day, if there is a new and powerful tool in the audio shed you should be using it.


Does it affect the frequencies and my mix?


It depends on your audio system and the RESISTOR RESPONSE CONTROL (RRC) Ω value.  In the low value of this resistor, there is no effect on the scene and therefore it does not affect the frequency response at all. Changing values from 1K1Ω to 2K2Ω slightly alters the relationship between the bass and the high frequencies. With a simple frequency the difference can be +-2dB, but is much lower with music that has a more dynamic DREi effect. There is a graph in the datasheet or  click here.


Does it affect the phase or polarity?


Not at all. Proof of this is that ,if you want, you can interchange the LR channels and use them interchangeably, for example in multi-channel systems such as monitors or movie theatres.


What is meant by reinterpretation of waveforms?


This is another of the internal functions of DREi, which is able to reinterpret the types of waves which should not be amplified as they waste unnecessary power sources as they can not be easily reproduced by the speakers. The electromagnetic behavior and physical limitations of the speakers do not let you reproduce a triangular wave efficiently and much less so a square wave (eg.a sine wave cut caused by saturation), and prevents them from behaving optimally with the rest of the sound if there are these types of waves. DREi corrects these problems but does not eliminate them, as you would lose some of the sound, but uses the part that must be reproduced and reinterprets the rest. So no nuances are lost in any of the instruments, or even the electronics. Try to imagine a speaker playing a slow square wave and you'll understand this better.


I have a question


Do not hesitate, send an e-mail to info@neutralaudio.com.  If of interest the question will be added to this FAQ.                                                                                                                                                                                                        -

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