STM B112 Bass Module

Injection-moulded bass cabinet featuring a Neodymium high excursion 3000W 12″ bass driver with 4″ voice coil. It has the same format – dimensions, weight, gravity centre – as the M46. The hybrid horn-loaded design maximizes the efficiency of the driver, delivering 6dB more than a standard front-loaded driver in this frequency range.

B112 features innovative PistonRigTM and REDLockTM rigging, enabling any size of system to be flown safely by one person. REDLockTM handle locks front rigging points from rear of cabinet. All adjustments made from one position at rear of cluster.

Key Features

  • 1 x 3000W +/- 3cm excursion 12 inch LF Driver
  • 141dB peak SPL
  • Frequency response: 63Hz-200Hz
  • H350mm/W575mm/D715mm
  • 59Kg/130lb


Frequency Response [a]63Hz – 200Hz ±3dB
Usable Range @-6dB [a]55Hz – 250Hz
Sensitivity 1W @ 1m [b]107dB SPL Nominal
Nominal Peak SPL @ 1m [b]141dB Peak
Nominal Impedance16Ω (12 Ω min)
Amplified ControllerNXAMP4x4 - 3xSTM B112 in parallel on 2 NXAMP4x4 bridged channels - 8000W/4Ω


ComponentsLF: 1 x 12” (30cm) 3000W high excursion Neodymium 16 Ohms driver
Height x Width x Depth350 x 575 x 715 mm – 13.78” x 22.64” x 28.15”
Weight : Net59kg – 130lbs
Connectors2 x NLT4-MDV Speakon 4 poles (in/out)
ConstructionPU Composite Low Density – Polyurethane water based black coating
Handles3 handles (2 sides and 1 rear)
FrontPerforated Dark Grey Metal Grille
RiggingIntegral 3 points flying system. Inter cabinet angle adjustments from 0.2° to 10° in logarithmic steps


STM Brochure