From Woodstock in 1969 to the world's largest modern touring festivals, JBL Professional has been a cornerstone of American sound reinforcement. With the launch of the VTX A-Series (A12, A8, A6), JBL re-engineered its acoustic architecture from the ground up, pairing world-class transducer physics with one of the fastest, safest rigging systems on the road.
1. Core Proprietary Technologies
A. Radiation Boundary Integrator (RBI)
The patented **RBI (Radiation Boundary Integrator)** waveguide mounts the high-frequency compression drivers directly within the mid-range horn acoustic boundary. It uses tuned acoustic perforations to let mid-frequency energy pass through smoothly while acting as a seamless waveguide for the high frequencies. This completely eliminates horn-edge diffraction artifacts and provides rock-solid horizontal directivity ($90^circ$ or $120^circ$).
B. Dual-Voice-Coil Differential Drive Transducers
JBL's proprietary **Differential Drive** technology utilizes two separate voice coils and magnetic gaps per driver. This delivers dramatically increased thermal heat dissipation, ultra-low power compression, and cuts magnet weight in half compared to conventional ceramic drivers.
C. Auto-Locking Quick Rigging
Touring crew fatigue is a major factor on multi-city runs. The VTX A-Series features an automatic locking suspension mechanism: you preset your splay angles on the ground cart, lift the array with a single motor, and the pins automatically lock into place at the precise target degree.
2. The JBL VTX Product Catalog & Lineup
| System / Model | Acoustic Specs & Drivers | Max Output & Weight | Recommended Deployment | Official Product Link |
|---|---|---|---|---|
| JBL VTX A12 | Large-Format Flagship (2x 12" LF, 4x 5.5" MF, 3x 2" HF) | 146 dB SPL | 60.8 kg (134 lbs) | Stadiums, Arenas, Major Festivals | JBL VTX A12 Official Page ↗ |
| JBL VTX A8 | Compact Touring Workhorse (2x 8" LF, 4x 3.5" MF, 2x 2" HF) | 139 dB SPL | 29.5 kg (65 lbs) | Theatres, Arenas, High-End Corporate | JBL VTX A8 Official Page ↗ |
| JBL VTX A6 | Sub-Compact Line Array (2x 6.5" LF, 1x 3" HF) | 134 dB SPL | 18.4 kg (40 lbs) | Under-Balcony, Front-Fills, Small Clubs | JBL VTX A6 Official Page ↗ |
| JBL VTX B28 | Arrayable Subwoofer (2x 18" 2288H Differential Drive) | 141 dB SPL | Down to 25 Hz | Ground / Flown Cardioid Sub Arrays | JBL VTX B28 Official Page ↗ |
3. Amplification & Processing: Crown I-Tech HD & Performance Manager
- Crown I-Tech 4x3500HD / 12000HD: Touring-grade multi-channel Class-I amplifiers with BSS Omnidrive HD DSP processing and LevelMAX limiters.
- JBL LAC-3 (Line Array Calculator 3): Fast acoustic and mechanical prediction software with direct rigging safety verification.
- Performance Manager: Real-time networked control suite for configuring arrays, monitoring loads, and testing transducer health over HiQnet.
(System Tech Tip: Calculate line array delay offsets with our interactive Speaker Delay Calculator).
