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For high output speaker systems, PRV Audio’s 12MB1000FT mid bass is an excellent option capable of amazing performance. A great new addition to the Forte Series, where more power handling and less distortion on mid low mid bass frequencies is the key.

All this attention to detail in the 12MB1000FT makes it one impressive driver. With 97.5 dB efficiency and 1000 watts of continuous program power (RMS), this mid bass is ideally suited to be used as a stage monitor, or in auditorium, touring and outdoor systems. Also, its smooth response from 70 to 3,200 Hz makes it perfect for 2 or 3-way designs.


  • 3″ Inside/Out aluminum voice coil wound on fiberglass former for hi-temp performance, 4 ohms
  • Ventilated voice coil gap reduces power compression
  • High Xmax for more Mid bass output
  • 1,000 watts continuous program power rating makes high acoustical output
  • Excellent performance in 2-way or 3-way systems
  • Weather-resistant paper cone and dust cap

A rigid cast aluminum frame with narrow spokes to minimize reflections back into the cone. In addition, the frame includes force cooling system openings which allows airflow to cool the voice coil.

To drive the voice coil, a large ferrite magnet with a very precise machined top and bottom plate has been used. The additional dual forced vent in the back plate of the coil allows this driver to handle up to 1000 watts RMS without issue.

Features a special high strength pulp composition paper cone designed to achieve the best possible linearity within the middle frequency range, which, together with a protective cone treatment dedicated to enhancing the dampening properties of the moving assembly, considerably improves its smooth frequency response.

The voice coil is wound on a 3″ glass fiber with aluminum wire, keeping weight to a minimum for an incredibly quick transient response. Engineered with 19 mm of winding depth, this inside/outside voice coil provides excellent thermal and mechanical durability.


Nominal Diameter 12″ (310 mm)
Nominal impedance 4 Ohm
Nominal Power Handling* 500 Watts
Continuous Program Power (RMS)** 1000 Watts
Max Peak Power*** 2000 Watts
Sensitivity 2.83V at 1m 97.5 dB
Recommended Hi Pass Crossover
For Full Power Handling
110 Hz
12db Per Octave Crossover
Frequency Response 70 – 3,200 Hz
Voice Coil Diameter 3″ (76 mm)
Voice Coil Wire Aluminum
Voice Coil Winding Depth 19.0 mm
Former Material Glass Fiber
Magnetic Gap Depth 10.5 mm
Frame Material Die Cast Aluminum

*Nominal power handling is defined as the maximum RMS power that the speaker can handle in a 2-hour test with a pink noise with 6dB of crest factor and a bandpass filter with 12db/oct tuned in its usable frequency range.
**Continuous Program Power (RMS) is the maximum power that the speaker can handle considering a regular musical program using our recommended filters, this power can be used to define the optimum amplifier power to avoid a clean signal without clipping or saturation.
***Max Peak Power is the maximum power operation for the speaker, this power is allowed just for a few fractions of a second, usually found just on the peaks of the music. Keeping this power for a little longer timer will damage the speaker.


Equivalent Volume Vas 74.57 l
Excursion (mathematical)*** Xmax 6.87 mm
Free Air Resonance Fs 52.72 Hz
Mechanical Factor Qms 13.35
Electrical Factor Qes 0.38
Total Factor Qts 0.37
Cone Area Sd 573 cm²
Mechanical Mass Mms 55.94 g
Bl Factor Bl 16.54 Tm
Dc Resistance Re 5.7 Ohms
Inductance Le 1.00 mH at 1 kHz
Mechanical Mass Without Air Mmd 48.19 g
Mechanical Compliance Cms 0.162 mm/N

***Xmax=(Voice coil winding depth-Magnetic Gap depth)/2+ Magnetic Gap Depth/4


Overall Diameter 12.40” (315 mm)
Front Mount Baffle Cutout 11.10” (282 mm)
Mounting Depth 5.20”(132 mm)
Overall Depth 5.76”(146.5 mm)
Net Weight 16.8 Lbs (7.62 kg)
Shipping Weight 18.51 Lbs (8.40 kg)
Carton Dimensions W x L x H 13.79”x 13.79” x 7.09”
(350 x 350 x 180mm)