• 113820_RCF-12_-Mid-Bass-Woofer-High-Efficiency-Replacement-Driver-_-MB12X351_ALT01sqr
  • 113820_RCF-12_-Mid-Bass-Woofer-High-Efficiency-Replacement-Driver-_-MB12X351_ALT02sqr
1 2

RCF 12" Mid-Bass Woofer High Efficiency Replacement Driver | MB12X351

RCF 12" Mid-Bass Woofer High Efficiency Replacement Driver | MB12X351

SoundPro Item: 113820 | Part Number: MB12X351

$369.00
$529.00 $369.00
Your Price Sold out
MSRP: $529.00 | MAP: $369.00

Usually ships in 5-7 business days

  • Fiberglass Inside/Outside Voice Coil Construction For Efficient Power Transfer
  • Curved Exponential Cone Geometry Maintains Linearity Across The Passband
  • Polycotton M-Roll Surround Delivers Controlled Excursion And Low Distortion
  • 8 Ohm Rated Impedance Compatible With Standard Professional Amplifier Loads
  • CE Compliant Construction Meets Regulatory Requirements For Pro AV Installs
  • Published Thiele-Small Parameters Support Accurate Enclosure Modeling
Log in or register for YOUR best price

The RCF 12" mid-bass woofer series is engineered for professional loudspeaker builders, cabinet designers, and system integrators who need a reliable, high-efficiency driver for mid-bass duties in touring and installed sound applications. Each driver in the range delivers a curved exponential cone geometry paired with polycotton surround construction to maintain precise linearity across the operating bandwidth. The fiberglass former and inside/outside layered voice coil design allow the cone assembly to manage demanding power loads while keeping moving mass in check, preserving the transient accuracy required in full-range and bi-amped system configurations.

These drivers are well suited for replacement work in existing RCF-based enclosures as well as new custom cabinet builds where engineers need verified Thiele-Small parameters to model alignment accurately. The consistent 12" nominal diameter and shared overall form factor across the family simplify integration into standard baffle configurations, while the range of available power handling and magnetic structure options lets integrators select the specific headroom and efficiency profile their system demands. CE compliance confirms the series meets regulatory requirements for professional installation across applicable markets.

View full details

Specifications

Certifications
Safety Agency
CE compliant
General Specifications
Nominal Diameter
12 inch / 305 mm
Rated Impedance
8 ohm
Minimum Impedance
7.1 ohm
Program Power
1400 W
Power Handling Capacity
700 W
Sensitivity
98.5 dB
Frequency Range
45 - 2500 Hz
Effective Piston Diameter
260 mm / 10.24 inch
Max. Excursion Before Damage
40 mm / 1.57 inch
Voice Coil Diameter
3.5 inch / 89 mm
Voice Coil Winding Material
Copper
Voice Coil Length
19 mm / 0.75 inch
Number Of Layers
2
Kind Of Layers
inside/outside
Top Plate Thickness
10 mm / 0.39 inch
Cone Design
Curved
Surround Material
Polycotton
Surround Design
M-roll
Magnets
Ceramic
Dual-Force Air Ventilation
Yes
Spider
03
Thiele-Small Parameters
Resonance Frequency (Fs)
55 Hz
DC Resistance (Re)
5.40 ohm
Mechanical Factor (Qms)
5.90 Qms
Electrical Factor (Qes)
0.27 Qes
Total Factor (Qts)
0.26 Qts
Bl Factor (Bl)
22.50 T x m
Effective Moving Mass (Mms)
72.0 g
Equivalent Air Load (Vas)
46.0 liters
Effective Piston Area (Sd)
0.050 m2
Max. Linear Excursion (Xmax)
7 mm
Voice Coil Inductance @ 1kHz (Le1k)
0.90 mH
Half-Space Efficiency (Eff)
3.00%
Dimensions
Height
143 mm / 5.63 inch
Diameter
320 mm / 12.6 inch
Overall Diameter
320 mm / 12.6 inch
Bolt Circle Diameter
293-304 mm / 11.54-11.97 inch
Bolt Hole Diameter
7 mm / 0.28 inch
Front Mount Baffle Cut-Out
282 mm / 11.1 inch
Rear Mount Baffle Cut-Out
284 mm / 11.18 inch
Volume Occupied By Driver
2.2 liters / 0.09 ft3
Weight
Weight
7.6 kg / 16.76 lbs
Shipping
Package Height
194 mm / 7.64 inch
Package Width
354 mm / 13.94 inch
Package Depth
364 mm / 14.33 inch
Package Weight
8.4 kg / 18.52 lbs

Why Choose SoundPro?

Since 1972, SoundPro has been the trusted source for audio, video, and lighting gear. Whether you're starting your AVL journey or are a seasoned professional, we're here to help you every step of the way.

Start Shopping

  • Certified Account Managers

    Our Account Managers, with 16+ industry certifications, are ready to find your solution.

  • Personalized Pricing

    We know every project is unique. Get a personalized quote anytime you need it

  • Fast Shipping & Local Pickup

    In stock items ship same day if ordered by 4pm CST. Pickup offered in Irving, TX.

  • Accountability from Real People

    We aim for a smooth, transparent experience by setting and sticking to clear expectations.

  • Easy Payments & Financing

    We accept all major credit cards and also offer financing through our partners.

1 2