Loud Professional

VH Sub121H



The VH Sub121H is a special Sub-Bass unit expressly designed and engineered for the lower frequencies response a the maximum SPL output. 
The hybrid system configuration (both Reflex & Horn loaded) houses a single 21in. transducer of a 4.5in. voice coil woofer tuned in a bass reflex enclosure to extend the LF output to below the natural horn cut-off point.
This particular system combines the efficiency and impact of a bass horn with the low frequency extension of a bass-reflex enclosure.
Two extra-large Bass-reflex ports allow to further extend the system frequency response down to 35Hz.
The benefits of this ideal combination ensure a greater sound impact along the most accurate lower reproduction. 
The Bass-punch is unrivaled and the incredible high SPL output makes the system extremely effective when providing sound to spacious outdoor environments.
Smaller, compared to the VH Sub218H, the 121H can be also used in indoor environments of great dimensions. 
The use is strongly recommended whenever a great impact, accuracy and transients fast response become mandatory.
Significant construction criteria, combined with the latest technologies and the innovative materials, ensure a great reliability. 
The VH Sub121H cabinet is constructed from marine plywood and has an impact and weather protected PCP (Polyurea Cabinet Protection) finish. 
It can be as well matched with all the most challenging Full-Range and Line Array Loud Professional systems significantly boosting their LF extension.
Applications: Large Open Air Venues, Arenas, Stadiums, Theaters, Conference Halls, Concert Halls and Large Scale Discos



VH Subwoofer: VH Sub118R || VH Sub218R || VH Infra218 || VH Sub218H


Products || VH Full-Range || VH Monitor || VH Line-Array || VH Subwoofer || VH Micro || Smart Series || FocusEight



21in. Long excursion


Folded Horn/Reflex loaded


Frequency range: 35Hz-150kHz +/4dB
Crossover points:


Power handling: LF: 4.000 Watts Program
Sensitivity: 106.5dB 1W@1mt
Nominal coverage: Omni
Nominal impedance: 8 ohms
Input connections: Two Neutrik NL4MPR Speakon

connectors paralleled

Enclosure Construction  
Shell: 18mm 13 Ply birch
Finish: Black or white Polyurea coated paint
Grille: Powder coated Steel
Height front: 1215mm(47.83")
Height back: 1215mm(47.83")
Width front: 685mm(26.96")
Width back: 685mm(26.96")
Depth: 900mm(35.43")
Net weight: 118Kg(260lbs)

Lab Gruppen

Preferred Amplifier PLM Series 20.000Q

PLM 10.000Q




Preferred Amplifier FP+ Series 14.000



VH Sub121H




MLS - Frequency Response



Frequency Response VH Sub218H




Loud Professional VH Sub121H Rear

Loud Professional VH Sub121H Angled



Loud Professional VH121H Horizzontal