JBL VTX B28

TECHNICAL SPECIFICATIONS
SYSTEM
Frequency Range (-10 dB): 25 Hz – 80 Hz (Preset: VTX B28 80)
Coverage Pattern Options 1: Omnidirectional or Cardioid
System Input Power Rating2: 2600W Continuous (IEC/100 hour)
Maximum Peak Output3 : 141 dB (Preset: VTX B28 80)
System Amplification: Crown I-Tech 12000HD
Crown I-Tech 4x3500HD
Required Amplifier Channels: (1) channel (SUB)
Number of Cabinets per Amplifier
IT-12000HD :
IT-4x3500HD4 :
(2) VTX B28
(2) VTX B28
System Impedance5 : 4 ohms
TRANSDUCERS
Low Frequency : (2) JBL 2288H-M, 18 in diameter, dual 4 in diameter voice coil, Neodymium Differential Drive
ENCLOSURE
Construction: 18 mm 13-ply and 12 mm 9-ply Finnish birch plywood, Black DuraFlexTM finish, four integral recessed handles
IP Rating6
: IP55 (IEC 60529)
Suspension: High-grade steel with anti-corrosion coating, captive suspension plates, captive pins, spring-loaded mechanism, two-step safety lock
Grill: Powder-coated 1.8 mm (14-gauge) hex-perforated stainless steel with acoustically transparent black cloth
backing
Connectors
Type :
Pin Assignments :
Neutrik® speakON® NL4 (one at the rear and one at the front)
Pins 1 ± active | Pins 2 ± not connected
Dimensions (H x W x D) : 508 mm x 1324 mm x 750 mm
20 in x 52.1 in x 29.5 in
Net Weight: 87 kg (191.8 lbs)
Footnotes:
1: Based on speaker preset selection and cabinet orientation/configuration.
2: IEC Standard: IEC shaped noise with 6 dB crest factor based on nominal impedance and a duration of 100 hours. Continuous is defined as 2x RMS.
3: Peak, unweighted SPL, measured under half-space conditions at 1 meter using broadband pink noise with a 12 dB crest factor and specified preset.
4: For more information on how to power B28 subwoofers using I-Tech 4x3500HD amplifiers, refer to the VTX B28 User Manual.
5: Nominal impedance within the stated frequency range of the product. The minimum impedance is 5.6 Ω at 150 Hz.
6: Front face at 0 degrees or greater down angle to allow the cabinet to drain water. Suspension components are fully weather-rated for indoor or covered outdoor conditions where humidity is nominally under 50% and not local
to bodies of corrosive materials. Unused speakON connectors must be sealed using silicone to protect against water and moisture.
JBL continually engages in research related to product improvement. Some materials, production methods, and design refinements are introduced into existing products without notice as a routine expression of that
philosophy. For this reason, any current JBL product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated.