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What is Deeflexx?

The Deeflexx is a high-end sound-deflection system for guitar and bass amps or cabinets. 

The diffuser deflects the beam of a speaker and converts it into a homogenous sound area.


  • Absolutely NO BEAM
  • Homogeneous sound-environment for both musicians and audience
  • Sound radius 0,5 – 7 meters, 180 °
  • Enhanced area for musicians
  • Warms up the amp sound
  • Fast and easy setup – no installation


„ Deeflexx improves the sound better than any other guitar or amp tuning I know. It’s like a two or three class upgrade of every part in the signal chain – you just have to play it once …“


H. Weber





How does Deeflexx work?



The sound is radiated by the loudspeaker and makes impact with the Deeflexx. Deep bass and mid frequencies pass unhindered through the Deeflexx due to their wave lengths, the higher frequencies are being dealt with specifically. 


The beam is divided in the smallest of portions and the missing parts are then diverted specifically in the mentioned directions, so that an almost spherical and homogeneous sound field is created. 

Dull sounding zones are brightened up, the shrill zones are dampened and the BEAM does not occur anymore.


The guitarist experiences the intimate contact with his amplifier everywhere, it sounds equally full whether near or far away.





Why use Deeflexx?


In the Sixties the invention of the electric guitar shuffled pop music revolutionarily upside down. 

For more than 5 decades guitar speakers have been built in the same traditional way and we are still in love with their sound. 

But there has been one problem that to the very day no one could solve sustainably: Guitar speakers beam. Acute, annoying, painful to the musician’s ear!


In the immediate nearness to the loudspeaker the sound is dull, whereas when farer away from the loudspeaker it sounds very shrill and thin. In clubs and on smaller stages your audience can scarcely hear your true sound.







What is beaming?

Loudspeakers don’t distribute sound evenly in all directions. Deep bass frequencies expand in a ball shape, while high frequencies are focussed together (into a „BEAM”) and are heard as a less pleasant, shrill sound. The most commonly used guitar and bass speakers are 10’’, 12’’ and 15’’ loudspeakers, and the larger the speaker the worse the disturbing effects are.


Pattern of sound emission from an amp:

Red = shrill sound = beam | Orange = top quality sound | Grey = dull sound

Schallabstrahlung ohne Deeflexx

Pattern of sound emission with DEEFLEXX: <= Top quality, even sound throughout the entire room. =>

Schallabstrahlung mit Deeflexx







The DEEFLEXX is the world’s first SOUND DEFLECTION SYSTEM for:

  • GUITAR amps
    Examples > FAQ & > Galerie




It diffuses the beam of shrill sounds into tiny parts, producing an even sound distribution through the gentle DEflection and reFLEXion of the sound.  The musical imprint is as good as the sound distribution of a high-quality HiFi loudspeaker.

With a punchy, present sound throughout the whole room and without shrill or dull sounding areas.


The Deeflexx does stop the beam effect, but this is only a part of its many functions and uses.

However, this is not a kind of product like a beam blocker device or a sound shield or anything similar.


  • it does not work by phase cancellation or isolating the high-frequency sounds
    >>> producing an indirect, sterile sound
  • it does not change the sound through physical interference
    >>> affects the bass / lower mids
  • it does not influence the miking by a comb filter effect
    >>> good sounding miking  positions are lost


  • No BEAM effect, even at high volumes – its function doesn’t depend on the volume level
  • shrill sounds are effectively distributed, without the indirect sound caused by blocking or isolating these sound waves
  • warm and clear, more transparent sounds are produced – every amp is upgraded
  • ‘enhanced zones’ of high-quality sound are generated close to the amp
  • exactly the same sound is heard by players and the audience
  • the set-up is extremely simple – there is no technical installation



The Deeflexx Systems are not mass-produced, but rather are manufactured in limited series by a small business in Germany. The high-quality material is extremely elastic and robust at the same time, and is also used for window panes in aeroplanes and armoured vehicles. Deeflexx was designed for long-term use and engineered without any wearing parts and each System carries a serial number on the type label.


Deeflexx H!1 EDITION V2.0


EDITION DESIGN: Meridian guiding lines for microphone placement

FIELD OF APPLICATION LIVE – at home/rehearsal room/stage

  • Balanced sound around the System
  • Shrill sound is eliminated by splitting up the beam
  • Fat and clear sound even on axis
  • no change of the sound with increasing distance to the cab
  • no dull or shrill sounding areas
  • harsh sounding frequencies are reduced – it’s sounding pleasant even at high volume
  • ADDITIONAL DIFFUSER: Adjust the “enhanced zones” by clicking on the diffuser
  • - without diffuser: Radiation of higher frequencies mainly directed vertically upwards
  • - with diffuser: Radiation of higher frequencies at a flat angle; silky, transparent sound vertically upwards
  • “Warm” or “neutral” sound character by changing the distance to the cab – scale in footplate
  • Better visibility by slanted edges on the sides and milled lines on top
Deeflexx H!1 EDITION V2.0 front
Deeflexx H!1 EDITION V2.0 back
Deeflexx H!1 EDITION V2.0 up


Deeflexx H!1 EDITION

  • The superior model for THE TOP PLAYERS and SOUND ENGINEERS with an additional diffuser for rehearsal rooms, stage and studio; "Swiss Knife" for every situation on stage
  • Adjusting the  “enhanced zones” by clicking on the red diffuser element
  • Without red diffuser: Sound radiation of high frequencies mainly upwards
  • With red diffuser: Sound radiation of high frequencies mainly to the side; gentle sound upwards
  • With red diffuser: Even more sweetpots for microphones near and on the surface of the diffuser
  • "Warm" or "Neutral" sound character by varying the distance to the cab; scale on base plate
  • EDITION Design: a reflective surface for great colour reproduction under stage lights
  • Weight: approx. 1.3 kg
Deeflexx H!1 Gesamtansicht
Deeflexx H!1 Ansicht von oben
Deeflexx H!1 Detail
Deeflexx H!1 Lichteffekt


Deeflexx H!1 AURA

  • The basic model for AMBITIOUS PLAYERS who demand the best sound at home, rehearsal room and stage
  • Without additional diffuser - simplest setup - plug&play
  • "Warm" or "Neutral" sound character by varying the distance to the cab; scale on base plate
  • AURA design: a transparent, barely visible surface allows the amps to be seen, but the Deeflexx can still be felt and heard
  • Weight: approx. 1.1kg

Deeflexx H!1 CORA


The Deeflexx H!1 CORA System is the small and slim sister. Because of the special design the directivity of a conventional cab is retained. The shrill beam is not blocked so much, but is is reduced to a musical level. In contrary to disc- or callot shaped beam blocker devices the function is not based on phase cancellations. The sound remains completely as it is.

  • Audibility is improved significantly in the surrounding range up to 3 meters
  • No changes of the basic sound by sonic interference
  • Biting highs are deflected effectively
  • Extended, narrow cone-shaped output of the softened beam
  • Cabinet keeps its frontal directivity
  • Detailed deception of the sound in the close-up area of the cab
  • Transparent product design
  • For standard amps and cabs up to 12” speakers (no oversized cabs)
  • Weight: approx. 0,55 kg; small dimensions, handy and easily portable


Cora von vorne
Cora von hinten
Cora Detailansicht
Cora von oben


Characteristic sound deflection

Schallabstrahlung 1





Schallabstrahlung 2




 Surround Effekt using 1 amp  *** *****  ***** 
 Stereo / Wall-Of-Sound effect using 2 amps  *** *****  ***** 
 Warming effect *****  ***** 
 Fat sound on axis > 4 meters ****  ***** 
 Spherical sound radiation in the room ***  ****  ***** 
 Cudgel-shaped radiation near the floor ***** 
 Intensity of Enhanced Zone sidewards **  *****  ***** 
 Intensity of Enhanced Zone upwards *****  *****  ***** 
 Variation Enhanced Zones – additional diffuser ***** 
 Dampening the beam ***** 
 Eliminating the beam ***  *****  ***** 
 Small stages – audibility in the close range *****  *****  ***** 
 Disturbing source „Beam“ for live sound engineer ***  *****  ***** 
 Sound for the audience in a club situation ***  ****  ***** 
 Sound exposure for fellow musicians **  ***  ***** 
 Difference of the sound by directivity of the cab ***  ****  ***** 
 Contact micing on the surface of the Deeflexx ***  ***** 
 Speaker micing – sound variations ****  ***** 
 Off–axis sounds ***  ***** 
 Variation in sound design ***  ***** 
Transport friendliness – size *****  ****  **** 
Very small stages *****  ****  **** 
Optical effects by external light **  ***  ***** 

Deeflexx is protected internationally as EC design model and patent.

The words HooVi and Deeflexx are registered as EC trademarks.

EC design model: 001864398 / PCT patent application: WO2011076298A1

EC trademark: 008979759 / EC trademark: 008978884

Note: Commercial manufacture, distribution, sale and use of a so-called copy is not allowed.

(See FAQ)




Technical data


Type description  H!1 CORA  H!1 AURA  H!1 EDITION
Dimensions mm  570 x 260 x 100  650 x 280 x 120  650 x 280 x 120
Height mm (standing) 410 450 450
Weight kg 0,55 1,1 1,3
Temperature °C -20 to +40 -20 to +40 -20 to +40