With the Multi-preamplifier, just remove the cover with the included screwdriver and replace the factory fitted RED element with another coloured element supplied.


Remember to always disconnect the power supply before opening.

soundstage DREi Neutral Audio


· FULL position (red) is the normal setting, without modification, the Synergy control is off. The DREi process is operating 100%.


· Position B (blue) places you in the front row.


· Position D and E (green) puts you in the position of conductor.



Note: These situations are merely informative, and depend on the type of room and speakers in use.

change soundstage multipreamps DREi Neutral Audiochange soundstage  DREi Neutral Audio

The X-DREi HighEnd Synergy Control is an exterior switch located on the back of the device.

Soundstage by Neutral Audio

It produces clear differences in the three-dimensional sound and response of the strength and intensity of the lower and upper zone.

This is not a tone control or EQ, it is nothing seen before. This is a function of the DREI tech. and works in the analogue domain without any kind digital circuits.


Now we can adapt perfectly the overall sound of your audio system by increasing the synergy between the components. The immediate result is greater dimensionality and naturalness.


The stereo sound is three-dimensional, with depth, height and openness. The effective dynamic control (SYNERGY) establishes priorities for the impulse response of each of the different preamps or parallel buffers for each channel allowing perfect synergy within your complete system, optimizing the performance of the room and the speakers so that the result is neutral and real as possible.

Video “The sound that came from the future”

Chap. 5: Changing the soundstage

The DREi Micro LEDs are used to indicate the synergy position.

It is controlled by the cental button and remote control.

Topology DREi by Neutral Audio



DREi dynamically controls a number of buffers or preamps to mix in a monophonic signal. With an external control this allows the user to adjust the Synergy of the system by controlling the priorities of the DREi on these buffers and so getting the best performance for all amplification and speakers.


The frequency response is affected by the chosen position. The "NORMAL" position disables the control and a linear curve is obtained in the response. This is an interesting added feature on some models.


DREi´s internal processes always operate fully and is indifferent to this setting.


Neutral Audio, Now possible









Neutral Audio