Deeflexx is an Austrian sound-deflection system designed for guitar and bass amplifiers, invented by Hubert "HooVi" Hochleitner and produced under his Hoovi brand. The product line addresses speaker beaming — the narrow on-axis frequency response typical of guitar cabinets — by placing a shaped acrylic panel in front of the amp to redirect sound upward and outward, broadening the listening sweet spot for the player, the rest of the band, and the front rows of an audience.

The range centers on the H!1 EDITION and H!1 AURA models, free-standing diffusers built from shatter-resistant Perspex with a distinctive curved geometry. Variants exist for combo amps, stacks, and bass cabinets, and the company has produced revisions such as the H!1 EDITION V2.0 with adjusted contours aimed at studio and recording use. The systems are sold direct through Hoovi as well as through retailers including Thomann, Music Store, and Reverb.

Deeflexx occupies a niche between acoustic-treatment and stage-monitoring gear, and is most associated with blues and rock players who prefer to hear their backline rather than rely solely on in-ear or wedge monitors. Endorsers and users documented by the company include Aynsley Lister, Eamonn McCormack, Marcus Deml, and Goran Mikulec, among others on the European blues-rock circuit.

DeeFlexx has 2 products cataloged on Equipboard, including Guitar Amp Speakers. Their gear is featured by 2 artists, with the strongest followings in Rock and Blues. Notable users include Aynsley Lister and Marcus Deml.